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Wikipedia

Raspberry Pi

May 01, 2023

"RPi" redirects here. For other uses, see RPI. For the dessert, see Raspberry pie.

Raspberry Pi (/paɪ/) is a series of small single-board computers (SBCs) developed in the United Kingdom by the Raspberry Pi Foundation in association with Broadcom.[14] The Raspberry Pi project originally leaned towards the promotion of teaching basic computer science in schools.[15][16][17] The original model became more popular than anticipated,[18] selling outside its target market for uses such as robotics. It is widely used in many areas, such as for weather monitoring,[19] because of its low cost, modularity, and open design. It is typically used by computer and electronic hobbyists, due to its adoption of the HDMI and USB standards.

Raspberry Pi
Raspberry Pi 4 Model B
Also known asRPi, Raspi
Release date
  • 29 February 2012; 11 years ago (2012-02-29) (Project)
  • 24 June 2019; 3 years ago (2019-06-24) (Current gen)
Introductory price
  • US$4.00 (Pi Pico)
  • US$35.00 (Pi 4 1GB RAM)
  • US$45.00 (Pi 4 2GB RAM)
  • US$55.00 (Pi 4 4GB RAM)[1]
  • US$75.00 (Pi 4 8GB RAM)[2]
  • US$70.00 (Pi 400 4 GB)[3]
Operating systemLinux (incl Raspberry Pi OS)
FreeBSD
NetBSD
OpenBSD
Plan 9
RISC OS
Windows 10 ARM64
Windows 10 IoT Core[4]
and OS-less Embedded RTL's[clarification needed].
System on a chip
CPU
Memory
StorageMicroSDXC slot, USB Mass Storage device for booting[9]
Graphics
Power5 V; 3 A (for full power delivery to USB devices)[13]
Websitewww.raspberrypi.com

After the release of the second board type, the Raspberry Pi Foundation set up a new entity, named Raspberry Pi Trading, and installed Eben Upton as CEO, with the responsibility of developing technology.[20] The Foundation was rededicated as an educational charity for promoting the teaching of basic computer science in schools and developing countries. Most Pis are made in a Sony factory in Pencoed, Wales,[21] while others are made in China and Japan.[22][23]

In 2015 the Raspberry Pi surpassed the ZX Spectrum in unit sales, becoming the best selling British computer.[24]

Series and generations

 
The Raspberry Pi Zero, introduced in 2015
 
The Raspberry Pi 3 B+, introduced in 2018
 
The Raspberry Pi 4 B, introduced in 2019
 
The Raspberry Pi Pico, introduced in 2021
 
The Raspberry Pi Zero 2 W, introduced in 2021

There are three series of Raspberry Pi, and several generations of each have been released. Raspberry Pi SBCs feature a Broadcom system on a chip (SoC) with an integrated ARM-compatible central processing unit (CPU) and on-chip graphics processing unit (GPU), while Raspberry Pi Pico has a RP2040 system on chip with an integrated ARM-compatible central processing unit (CPU).

Raspberry Pi

  • The first-generation Raspberry Pi Model B was released in February 2012, followed by the simpler and cheaper Model A.
  • In 2014, the Foundation released a board with an improved design, Raspberry Pi Model B+. These first-generation boards feature ARM11 processors, are approximately credit-card sized, and represent the standard mainline form factor. Improved A+ and B models were released within a year. A "Compute Module" was released in April 2014 for embedded applications.
  • The Raspberry Pi 2 was released in February 2015 and initially featured a 900 MHz 32-bit quad-core ARM Cortex-A7 processor with 1 GB RAM. Revision 1.2 featured a 900 MHz 64-bit quad-core ARM Cortex-A53 processor (the same as that in the Raspberry Pi 3 Model B, but underclocked to 900 MHz).[25]
  • The Raspberry Pi 3 Model B was released in February 2016 with a 1.2 GHz 64-bit quad core ARM Cortex-A53 processor, on-board 802.11n Wi-Fi, Bluetooth and USB boot capabilities.[26]
  • On Pi Day 2018, the Raspberry Pi 3 Model B+ was launched with a faster 1.4 GHz processor, a three-times faster Gigabit Ethernet (throughput limited to ca. 300 Mbit/s by the internal USB 2.0 connection), and 2.4 / 5 GHz dual-band 802.11ac Wi-Fi (100 Mbit/s).[27] Other features are Power over Ethernet (PoE) (with the add-on PoE HAT), USB boot and network boot (an SD card is no longer required).
  • The Raspberry Pi 4 Model B was released in June 2019[1] with a 1.5 GHz 64-bit quad core ARM Cortex-A72 processor, on-board 802.11ac Wi-Fi, Bluetooth 5, full gigabit Ethernet (throughput not limited), two USB 2.0 ports, two USB 3.0 ports, 1–8 GB of RAM, and dual-monitor support via a pair of micro HDMI (HDMI Type D) ports for up to 4K resolution. The version with 1 GB RAM has been abandoned and the prices of the 2 GB version have been reduced. The 8 GB version has a revised circuit board. The Pi 4 is also powered via a USB-C port, enabling additional power to be provided to downstream peripherals, when used with an appropriate PSU. But the Pi can only be operated with 5 volts and not 9 or 12 volts like other mini computers of this class. The initial Raspberry Pi 4 board has a design flaw where third-party e-marked USB cables, such as those used on Apple MacBooks, incorrectly identify it and refuse to provide power.[28][29] Tom's Hardware tested 14 different cables and found that 11 of them turned on and powered the Pi without issue.[30] The design flaw was fixed in revision 1.2 of the board, released in late 2019.[31] In mid-2021, Pi 4 B models appeared with the improved Broadcom BCM2711C0. The manufacturer is now using this chip for the Pi 4 B and Pi 400. However, the clock frequency of the Pi 4 B was not increased in the factory.
 
Raspberry Pi 400 Kit
  • The Raspberry Pi 400 was released in November 2020. A modern example of a keyboard computer, it features 4 GB of LPDDR4 RAM on a custom board derived from the existing Raspberry Pi 4 combined with a keyboard in a single case. The case was derived from that of the Raspberry Pi Keyboard.[32] A robust cooling solution (i.e. a broad metal plate) and an upgraded switched-mode power supply[33] allow the Raspberry Pi 400's Broadcom BCM2711C0 processor to be clocked at 1.8 GHz, which is 20% faster than the Raspberry Pi 4 upon which it is based.[34]

Raspberry Pi Zero

  • A Raspberry Pi Zero with smaller size and reduced input/output (I/O) and general-purpose input/output (GPIO) capabilities was released in November 2015 for US$5.
  • On 16 May 2016, the Raspberry Pi Zero v1.3 was released, which added a camera connector.[35]
  • On 28 February 2017, the Raspberry Pi Zero W was launched, a version of the Zero with Wi-Fi and Bluetooth capabilities, for US$10.[36][37]
  • On 12 January 2018, the Raspberry Pi Zero WH was launched, a version of the Zero W with pre-soldered GPIO headers.[38]
  • On 28 October 2021, the Raspberry Pi Zero 2 W was launched, a version of the Zero W with a system in a package (SiP) designed by Raspberry Pi and based on the Raspberry Pi 3.[39] In contrast to the older Zero models, the Pi Zero 2 W is 64-bit capable. The price is around US$15.

Raspberry Pi Pico

  • Raspberry Pi Pico was released in January 2021 with a retail price of $4.[40] It was Raspberry Pi's first board based upon a single microcontroller chip; the RP2040, which was designed by Raspberry Pi in the UK.[41] The Pico has 264 KB of RAM and 2 MB of flash memory. It is programmable in C, C++, Assembly, MicroPython, CircuitPython and Rust. The Raspberry Pi Foundation has partnered with Adafruit, Pimoroni, Arduino and SparkFun to build accessories for Raspberry Pi Pico and variety of other boards using RP2040 Silicon Platform.[42] Rather than perform the role of general purpose computer (like the others in the range) it is designed for physical computing, similar in concept to an Arduino.[43]
  • On 30 June 2022, the Raspberry Pi Pico W was launched, a version of the Pico with 802.11n Wi-Fi capability, for US$6. The CYW43439 wireless chip in the Pico W also supports Bluetooth, but the capability was not enabled at launch.[44]

Model comparison

Family Model SoC Memory Form Factor Ethernet Wireless GPIO Released Discontinued
Raspberry Pi B BCM2835 256 MB Standard[a] Yes No 26-pin 2012 Yes (????)
512 MB 2012[45]
A 256 MB No 2013 No
B+ 512 MB Yes 40-pin 2014
A+ Compact[b] No
Raspberry Pi 2 B BCM2836 / 7 1 GB Standard[a] Yes No 2015
Raspberry Pi Zero Zero BCM2835 512 MB Ultra-compact[c] No No
W / WH Yes 2017
2 W BCM2710A1[d][46] 2021
Raspberry Pi 3 B BCM2837A0 / B0 1 GB Standard[a] Yes Yes 2016
A+ BCM2837B0 512 MB Compact[b] No Yes[e] 2018
B+ 1 GB Standard[a] Yes[f] 2018
Raspberry Pi 4 B BCM2711 1 GB Standard[a] Yes[g] Yes[e] 2019[47] Yes (2020)[48]
2021[49] No
2 GB 2019[47]
4 GB
8 GB 2020
400 4 GB Keyboard
Raspberry Pi Pico Pico RP2040 264 KB Pico[h] No No 2021
W Yes[i] 2022
  1. ^ a b c d e 85.6 mm × 56.5 mm (3.37 in × 2.22 in)
  2. ^ a b 65 mm × 56.5 mm (2.56 in × 2.22 in)
  3. ^ 65 mm × 30 mm (2.6 in × 1.2 in)
  4. ^ Custom Raspberry Pi SiP RP3A0
  5. ^ a b Dual band
  6. ^ Gigabit Ethernet; Throughput limited to ca. 300 Mbit/s by the internal USB 2.0 connection
  7. ^ Gigabit Ethernet
  8. ^ 21 mm × 51 mm (0.83 in × 2.01 in)
  9. ^ 2.4 GHz band

As of 4 May 2021, the Foundation is committed to manufacture most Pi models until at least January 2026. Even the 1 GB Pi 4B can still be specially-ordered.[50]

Hardware

The Raspberry Pi hardware has evolved through several versions that feature variations in the type of the central processing unit, amount of memory capacity, networking support, and peripheral-device support.

 
Block diagram describing models B, B+, A and A+

This block diagram describes models B, B+, A and A+. The Pi Zero models are similar, but lack the Ethernet and USB hub components. The Ethernet adapter is internally connected to an additional USB port. In Model A, A+, and the Pi Zero, the USB port is connected directly to the system on a chip (SoC). On the Pi 1 Model B+ and later models the USB/Ethernet chip contains a five-port USB hub, of which four ports are available, while the Pi 1 Model B only provides two. On the Pi Zero, the USB port is also connected directly to the SoC, but it uses a micro USB (OTG) port. Unlike all other Pi models, the 40 pin GPIO connector is omitted on the Pi Zero, with solderable through-holes only in the pin locations. The Pi Zero WH remedies this.

Processor speed ranges from 700 MHz to 1.4 GHz for the Pi 3 Model B+ or 1.5 GHz for the Pi 4; on-board memory ranges from 256 MB to 8 GB random-access memory (RAM), with only the Raspberry Pi 4 having more than 1 GB. Secure Digital (SD) cards in MicroSDHC form factor (SDHC on early models) are used to store the operating system and program memory, however some models also come with onboard eMMC storage[51] and the Raspberry Pi 4 can also make use of USB-attached SSD storage for its operating system.[52] The boards have one to five USB ports. For video output, HDMI and composite video are supported, with a standard 3.5 mm tip-ring-sleeve jack carrying mono audio together with composite video. Lower-level output is provided by a number of GPIO pins, which support common protocols like I²C. The B-models have an 8P8C Ethernet port and the Pi 3, Pi 4 and Pi Zero W have on-board Wi-Fi 802.11n and Bluetooth.[53]

Processor

 
The Raspberry Pi 2B uses a 32-bit 900 MHz quad-core ARM Cortex-A7 processor.

The Broadcom BCM2835 SoC used in the first generation Raspberry Pi[54] includes a 700 MHz 32-bit ARM1176JZF-S processor, VideoCore IV graphics processing unit (GPU),[55] and RAM. It has a level 1 (L1) cache of 16 KB and a level 2 (L2) cache of 128 KB. The level 2 cache is used primarily by the GPU. The SoC is stacked underneath the RAM chip, so only its edge is visible. The ARM1176JZ(F)-S is the same CPU used in the original iPhone,[56] although at a higher clock rate, and mated with a much faster GPU.

The earlier V1.1 model of the Raspberry Pi 2 used a Broadcom BCM2836 SoC with a 900 MHz 32-bit, quad-core ARM Cortex-A7 processor, with 256 KB shared L2 cache.[57] The Raspberry Pi 2 V1.2 was upgraded to a Broadcom BCM2837 SoC with a 1.2 GHz 64-bit quad-core ARM Cortex-A53 processor,[25] the same one which is used on the Raspberry Pi 3, but underclocked (by default) to the same 900 MHz CPU clock speed as the V1.1. The BCM2836 SoC is no longer in production as of late 2016.

The Raspberry Pi 3 Model B uses a Broadcom BCM2837 SoC with a 1.2 GHz 64-bit quad-core ARM Cortex-A53 processor, with 512 KB shared L2 cache. The Model A+ and B+ are 1.4 GHz[58][59][60]

The Raspberry Pi 4 uses a Broadcom BCM2711 SoC with a 1.5 GHz (later models: 1.8 GHz) 64-bit quad-core ARM Cortex-A72 processor, with 1 MB shared L2 cache.[61][62] Unlike previous models, which all used a custom interrupt controller poorly suited for virtualisation, the interrupt controller on this SoC is compatible with the ARM Generic Interrupt Controller (GIC) architecture 2.0, providing hardware support for interrupt distribution when using ARM virtualisation capabilities.[63][64]

The Raspberry Pi Zero and Zero W use the same Broadcom BCM2835 SoC as the first generation Raspberry Pi, although now running at 1 GHz CPU clock speed.[65]

The Raspberry Pi Zero W 2 uses the RP3A0-AU CPU, a 1 GHz 64 bit ARM Cortex A53, on 512MB of SDRAM. Documentation states this "system-on-package" is a Broadcom BCM2710A1 package, using a BCM2837 Broadcom chip as core, which is an ARM v8 quad-core. The Raspberry Pi 3 also uses the BCM2837, but clocked at 1.2 GHz.

The Raspberry Pi Pico uses the RP2040 running at 133 MHz.

Performance

While operating at 700 MHz by default, the first generation Raspberry Pi provided a real-world performance roughly equivalent to 0.041 GFLOPS.[66][67] On the CPU level the performance is similar to a 300 MHz Pentium II of 1997–99. The GPU provides 1 Gpixel/s or 1.5 Gtexel/s of graphics processing or 24 GFLOPS of general purpose computing performance. The graphical capabilities of the Raspberry Pi are roughly equivalent to the performance of the Xbox of 2001.

Raspberry Pi 2 V1.1 included a quad-core Cortex-A7 CPU running at 900 MHz and 1 GB RAM. It was described as 4–6 times more powerful than its predecessor. The GPU was identical to the original.[57] In parallelised benchmarks, the Raspberry Pi 2 V1.1 could be up to 14 times faster than a Raspberry Pi 1 Model B+.[68]

The Raspberry Pi 3, with a quad-core Cortex-A53 processor, is described as having ten times the performance of a Raspberry Pi 1.[69] Benchmarks showed the Raspberry Pi 3 to be approximately 80% faster than the Raspberry Pi 2 in parallelised tasks.[70]

The Raspberry Pi 4, with a quad-core Cortex-A72 processor, is described as having three times the performance of a Raspberry Pi 3.[1]

Overclocking

Most Raspberry Pi systems-on-chip could be overclocked to 800 MHz, and some to 1000 MHz. There are reports the Raspberry Pi 2 can be similarly overclocked, in extreme cases, even to 1500 MHz (discarding all safety features and over-voltage limitations). In Raspberry Pi OS the overclocking options on boot can be made by a software command running "sudo raspi-config" without voiding the warranty.[71] In those cases the Pi automatically shuts the overclocking down if the chip temperature reaches 85 °C (185 °F), but it is possible to override automatic over-voltage and overclocking settings (voiding the warranty); an appropriately sized heat sink is needed to protect the chip from serious overheating.

Newer versions of the firmware contain the option to choose between five overclock ("turbo") presets that, when used, attempt to maximise the performance of the SoC without impairing the lifetime of the board. This is done by monitoring the core temperature of the chip and the CPU load, and dynamically adjusting clock speeds and the core voltage. When the demand is low on the CPU or it is running too hot, the performance is throttled, but if the CPU has much to do and the chip's temperature is acceptable, performance is temporarily increased with clock speeds of up to 1 GHz, depending on the board version and on which of the turbo settings is used.

The overclocking modes are:

none 700 MHz ARM 250 MHz core 400 MHz SDRAM 0 overvolting
modest 800 MHz ARM 250 MHz core 400 MHz SDRAM 0 overvolting
medium 900 MHz ARM 250 MHz core 450 MHz SDRAM 2 overvolting
high 950 MHz ARM 250 MHz core 450 MHz SDRAM 6 overvolting
turbo 1000 MHz ARM 500 MHz core 600 MHz SDRAM 6 overvolting
Pi 2 1000 MHz ARM 500 MHz core 500 MHz SDRAM 2 overvolting
Pi 3 1100 MHz ARM 550 MHz core 500 MHz SDRAM 6 overvolting. In system information the CPU speed appears as 1200 MHz. When idling, speed lowers to 600 MHz.[71][72]

In the highest (turbo) mode the SDRAM clock speed was originally 500 MHz, but this was later changed to 600 MHz because of occasional SD card corruption. Simultaneously, in high mode the core clock speed was lowered from 450 to 250 MHz, and in medium mode from 333 to 250 MHz.

The CPU of the first and second generation Raspberry Pi board did not require cooling with a heat sink or fan, even when overclocked, but the Raspberry Pi 3 may generate more heat when overclocked.[73]

RAM

The early designs of the Raspberry Pi Model A and B boards included only 256 MB of random access memory (RAM). Of this, the early beta Model B boards allocated 128 MB to the GPU by default, leaving only 128 MB for the CPU.[74] On the early 256 MB releases of models A and B, three different splits were possible. The default split was 192 MB for the CPU, which should be sufficient for standalone 1080p video decoding, or for simple 3D processing. 224 MB was for Linux processing only, with only a 1080p framebuffer, and was likely to fail for any video or 3D. 128 MB was for heavy 3D processing, possibly also with video decoding.[75] In comparison, the Nokia 701 uses 128 MB for the Broadcom VideoCore IV.[76]

The later Model B with 512 MB RAM, was released on 15 October 2012 and was initially released with new standard memory split files (arm256_start.elf, arm384_start.elf, arm496_start.elf) with 256 MB, 384 MB, and 496 MB CPU RAM, and with 256 MB, 128 MB, and 16 MB video RAM, respectively. But about one week later, the foundation released a new version of start.elf that could read a new entry in config.txt (gpu_mem=xx) and could dynamically assign an amount of RAM (from 16 to 256 MB in 8 MB steps) to the GPU, obsoleting the older method of splitting memory, and a single start.elf worked the same for 256 MB and 512 MB Raspberry Pis.[77]

The Raspberry Pi 2 has 1 GB of RAM.

The Raspberry Pi 3 has 1 GB of RAM in the B and B+ models, and 512 MB of RAM in the A+ model.[78][79][80] The Raspberry Pi Zero and Zero W have 512 MB of RAM.

The Raspberry Pi 4 is available with 1, 2, 4 or 8 GB of RAM.[81] A 1 GB model was originally available at launch in June 2019 but was discontinued in March 2020,[48] and the 8 GB model was introduced in May 2020.[2] The 1 GB model returned in October 2021.[82]

Networking

The Model A, A+ and Pi Zero have no Ethernet circuitry and are commonly connected to a network using an external user-supplied USB Ethernet or Wi-Fi adapter. On the Model B and B+ the Ethernet port is provided by a built-in USB Ethernet adapter using the SMSC LAN9514 chip.[83] The Raspberry Pi 3 and Pi Zero W (wireless) are equipped with 2.4 GHz WiFi 802.11n (150 Mbit/s) and Bluetooth 4.1 (24 Mbit/s) based on the Broadcom BCM43438 FullMAC chip with no official support for monitor mode (though it was implemented through unofficial firmware patching[84]) and the Pi 3 also has a 10/100 Mbit/s Ethernet port. The Raspberry Pi 3B+ features dual-band IEEE 802.11b/g/n/ac WiFi, Bluetooth 4.2, and Gigabit Ethernet (limited to approximately 300 Mbit/s by the USB 2.0 bus between it and the SoC). The Raspberry Pi 4 has full gigabit Ethernet (throughput is not limited as it is not funnelled via the USB chip.)

Special-purpose features

The RPi Zero, RPi1A, RPi3A+[85] and RPi4 can be used as a USB device or "USB gadget", plugged into another computer via a USB port on another machine. It can be configured in multiple ways, such as functioning as a serial or Ethernet device.[86] Although originally requiring software patches, this was added into the mainline Raspbian distribution in May 2016.[86]

Raspberry Pi models with a newer chipset can boot from USB mass storage, such as from a flash drive. Booting from USB mass storage is not available in the original Raspberry Pi models, the Raspberry Pi Zero, the Raspberry Pi Pico, the Raspberry Pi 2 A models, and the Raspberry Pi 2 B models with versions lower than 1.2.[87]

Peripherals

 
The Model 2B boards incorporate four USB ports for connecting peripherals

Although often pre-configured to operate as a headless computer, the Raspberry Pi may also optionally be operated with any generic USB computer keyboard and mouse.[88] It may also be used with USB storage, USB to MIDI converters, and virtually any other device/component with USB capabilities, depending on the installed device drivers in the underlying operating system (many of which are included by default).

Other peripherals can be attached through the various pins and connectors on the surface of the Raspberry Pi.[89]

Video

 
An early Raspberry Pi 1 Model A, with an HDMI port and a standard RCA composite video port for older displays

The video controller can generate standard modern TV resolutions, such as HD and Full HD, and higher or lower monitor resolutions as well as older NTSC or PAL standard CRT TV resolutions. As shipped (i.e., without custom overclocking) it can support the following resolutions: 640×350 EGA; 640×480 VGA; 800×600 SVGA; 1024×768 XGA; 1280×720 720p HDTV; 1280×768 WXGA variant; 1280×800 WXGA variant; 1280×1024 SXGA; 1366×768 WXGA variant; 1400×1050 SXGA+; 1600×1200 UXGA; 1680×1050 WXGA+; 1920×1080 1080p HDTV; 1920×1200 WUXGA.[90]

Higher resolutions, up to 2048×1152, may work[91][92] or even 3840×2160 at 15 Hz (too low a frame rate for convincing video).[93] Allowing the highest resolutions does not imply that the GPU can decode video formats at these resolutions; in fact, the Raspberry Pis are known to not work reliably for H.265 (at those high resolutions),[94] commonly used for very high resolutions (however, most common formats up to Full HD do work).

Although the Raspberry Pi 3 does not have H.265 decoding hardware, the CPU is more powerful than its predecessors, potentially fast enough to allow the decoding of H.265-encoded videos in software.[95] The GPU in the Raspberry Pi 3 runs at higher clock frequencies of 300 MHz or 400 MHz, compared to previous versions which ran at 250 MHz.[96]

The Raspberry Pis can also generate 576i and 480i composite video signals, as used on old-style (CRT) TV screens and less-expensive monitors through standard connectors – either RCA or 3.5 mm phono connector depending on model. The television signal standards supported are PAL-B/G/H/I/D, PAL-M, PAL-N, NTSC and NTSC-J.[97]

Real-time clock

When booting, the time defaults to being set over the network using the Network Time Protocol (NTP). The source of time information can be another computer on the local network that does have a real-time clock, or to a NTP server on the internet. If no network connection is available, the time may be set manually or configured to assume that no time passed during the shutdown. In the latter case, the time is monotonic (files saved later in time always have later timestamps) but may be considerably earlier than the actual time. For systems that require a built-in real-time clock, a number of small, low-cost add-on boards with real-time clocks are available.[98][99]

The RP2040 microcontroller has a built-in real-time clock but this can not be set automatically without some form of user entry or network facility being added.

Connectors

J8 header and general purpose input-output (GPIO)

Raspberry Pi 1 Models A+ and B+, Pi 2 Model B, Pi 3 Models A+, B and B+, Pi 4, and Pi Zero, Zero W, Zero WH and Zero W 2 have the same 40-pin pinout called J8 header.[100][101] Raspberry Pi 1 Models A and B have only the first 26 pins.[102][103][104] The J8 header is commonly referred to as GPIO connector as a whole even though only a subset of the pins are GPIO pins. In the Pi Zero and Zero W, the 40 GPIO pins are unpopulated, having the through-holes exposed for soldering instead. The Zero WH (Wireless + Header) has the header pins preinstalled.

GPIO# 2nd func. Pin# Pin# 2nd func. GPIO#
+3.3 V 1 2 +5 V
2 SDA1 (I2C) 3 4 +5 V
3 SCL1 (I2C) 5 6 GND
4 GCLK 7 8 TXD0 (UART) 14
GND 9 10 RXD0 (UART) 15
17 GEN0 11 12 GEN1 18
27 GEN2 13 14 GND
22 GEN3 15 16 GEN4 23
+3.3 V 17 18 GEN5 24
10 MOSI (SPI) 19 20 GND
9 MISO (SPI) 21 22 GEN6 25
11 SCLK (SPI) 23 24 CE0_N (SPI) 8
GND 25 26 CE1_N (SPI) 7
(Pi 1 Models A and B stop here)
0 ID_SD (I2C) 27 28 ID_SC (I2C) 1
5 N/A 29 30 GND
6 N/A 31 32 N/A 12
13 N/A 33 34 GND
19 N/A 35 36 N/A 16
26 N/A 37 38 Digital IN 20
GND 39 40 Digital OUT 21

Model B rev. 2 also has a pad (called P5 on the board and P6 on the schematics) of 8 pins offering access to an additional 4 GPIO connections.[105] These GPIO pins were freed when the four board version identification links present in revision 1.0 were removed.[106]

GPIO# 2nd func. Pin# Pin# 2nd func. GPIO#
+5 V 1 2 +3.3 V
28 GPIO_GEN7 3 4 GPIO_GEN8 29
30 GPIO_GEN9 5 6 GPIO_GEN10 31
GND 7 8 GND

Models A and B provide GPIO access to the ACT status LED using GPIO 16. Models A+ and B+ provide GPIO access to the ACT status LED using GPIO 47, and the power status LED using GPIO 35.

Specifications

Version Pico Model A (no Ethernet) Model B (with Ethernet) Compute Module[a] Zero Keyboard
Raspberry Pi Pico Raspberry Pi Pico W RPi 1 Model A RPi 1 Model A+ RPi 3 Model A+ RPi 1 Model B RPi 1 Model B+ RPi 2 Model B RPi 2 Model B v1.2 RPi 3 Model B RPi 3 Model B+ RPi 4 Model B Compute Module 1 Compute Module 3 Compute Module 3 Lite Compute Module 3+ Compute Module 3+ Lite Compute Module 4 Compute Module 4 Lite RPi Zero PCB v1.2 RPi Zero PCB v1.3 RPi Zero W RPi Zero 2 W RPi 400
Release date Jan 2021 Jun 2022 Feb 2013​[107] Nov 2014​[108] Nov 2018 Apr–Jun 2012 Jul 2014​[109] Feb 2015​[57] Oct 2016​[110] Feb 2016​[69] 14 Mar 2018​[27] 24 June 2019​[111]
28 May 2020 (8GB)[2]		 Apr 2014​[112][113] Jan 2017​[114] Jan 2019​[115] Oct 2020 Nov 2015​[8] May 2016 28 Feb 2017 28 Oct 2021​[39] 2 Nov 2020
Target price (USD) $4 $6 $25[107] $20[108] $25 $35[116] $25[117] $35 $35/55/75​[111][48][2] $30 (in batches of 100)[118] $30 $25 $30/35/40 $25 $30-$90 (in $5 increments) $25-$75 (in $5 increments) $5[8] $10 $15 $70
Instruction set Armv6-M ARMv6Z (32-bit) ARMv8-A (64/32-bit) ARMv6Z (32-bit) ARMv7-A (32-bit) ARMv8-A (64/32-bit) ARMv6Z (32-bit) ARMv8-A (64/32-bit) ARMv6Z (32-bit) ARMv8-A (64/32-bit) ARMv8-A (64/32-bit)
SoC Raspberry Pi RP2040 Broadcom BCM2835[54] Broadcom BCM2837B0​[27] Broadcom BCM2835[54] Broadcom BCM2836 Broadcom BCM2837 Broadcom BCM2837B0​[27] Broadcom BCM2711​[111] Broadcom BCM2835[118] Broadcom BCM2837 Broadcom BCM2837B0 Broadcom BCM2711 Broadcom BCM2835 Broadcom BCM2710A1 Broadcom BCM2711C0
FPU None VFPv2; NEON not supported VFPv4 + NEON VFPv2; NEON not supported VFPv4 + NEON VFPv2; NEON not supported VFPv4 + NEON VFPv2; NEON not supported VFPv4 + NEON VFPv4 + NEON
CPU Dual-core Arm Cortex-M0+ 1× ARM1176JZF-S 700 MHz 4× Cortex-A53 1.4 GHz 1× ARM1176JZF-S 700 MHz 4× Cortex-A7 900 MHz 4× Cortex-A53 900 MHz 4× Cortex-A53 1.2 GHz 4× Cortex-A53 1.4 GHz 4× Cortex-A72 1.5 GHz or 1.8 GHz[33] 1× ARM1176JZF-S 700 MHz 4× Cortex-A53 1.2 GHz 4× Cortex-A72 1.5 GHz 1× ARM1176JZF-S 1 GHz 4× Cortex-A53 1 GHz 4× Cortex-A72 1.8 GHz
GPU None Broadcom VideoCore IV @ 250 MHz[b] Broadcom VideoCore IV @ 400 MHz (Core) / 300 MHz (V3D) Broadcom VideoCore VI @ 500 MHz[119] Broadcom VideoCore IV @ 250 MHz[b] Broadcom VideoCore VI @ 500 MHz[119] Broadcom VideoCore IV @ 400 MHz (Core) / 300 MHz (V3D) Broadcom VideoCore VI @ 500 MHz
Memory (SDRAM)[120] 264 kB 256 MB[c] 256 or 512 MB[c]
Changed to 512 MB on 10 August 2016[121]		 512 MB[c] 256 or 512 MB[c]
Changed to 512 MB on 15 October 2012[45]		 512 MB[c] 1 GB[c] 1, 2, 4 or 8 GB[c] 512 MB[c] 1 GB[c] 1, 2, 4 or 8 GB[c] 512 MB[c] 4 GB
USB 2.0 ports[88] None 1[d] 1[e] 2[f][122] 4[g][83][109] 2[111] 1[d][a] 1[d][a] 1[e][a] 1 1 Micro-USB[d] 1
USB 3.0 ports 0 2[111] 0 2
USB OTG ports 0 1 (Power USB-C)​[123] 0 ? 1 Micro-USB[d] 0
PCIe interface 0 PCIe Gen 2 x1 0 0
Video input 15-pin MIPI camera interface (CSI) connector, used with the Raspberry Pi camera or Raspberry Pi NoIR camera[124] 2× MIPI camera interface (CSI)[a][118][125][126] 2-lane MIPI CSI camera interface, 4-lane MIPI CSI camera interface None MIPI camera interface (CSI)[127] None
HDMI 1× HDMI (rev 1.3) 2× HDMI (rev 2.0) via Micro-HDMI[47] 1× HDMI[a] 2x HDMI 1× Mini-HDMI 2× HDMI (rev 2.0) via Micro-HDMI
Composite video via RCA jack via 3.5 mm CTIA style TRRS jack via RCA jack via 3.5 mm CTIA style TRRS jack Yes[a][125][128] ? via marked points on PCB for optional header pins[129] ?
MIPI display interface (DSI)[h] Yes Yes[a][118][126][130][131] Yes No ?
Audio inputs As of revision 2 boards via I²S[132] ?
Audio outputs Analog via 3.5 mm phone jack; digital via HDMI and, as of revision 2 boards, I²S Analog, HDMI, I²S[a] Mini-HDMI, stereo audio through PWM on GPIO Micro-HDMI
On-board storage[88] 2 MB Flash memory SD, MMC, SDIO card slot (3.3 V with card power only) MicroSDHC slot[109] SD, MMC, SDIO card slot MicroSDHC slot MicroSDHC slot, USB Boot Mode[133] 4 GB eMMC flash memory chip[118] MicroSDHC slot 8/16/32 GB eMMC flash memory chip[118] MicroSDHC slot 8/16/32 GB eMMC flash memory chip[118] MicroSDHC slot MicroSDHC slot MicroSDHC slot
Ethernet (8P8C)[88] None None[134] None 10/100 Mbit/s
USB adapter on the USB hub[122]		 10/100 Mbit/s 10/100/1000 Mbit/s (real max speed 300 Mbit/s)[135] 10/100/1000 Mbit/s[111] None 10/100/1000 Mbit/s None None 10/100/1000 Mbit/s
WiFi IEEE 802.11 wireless None b/g/n single band 2.4 GHz b/g/n/ac dual band 2.4/5 GHz None b/g/n single band 2.4 GHz b/g/n/ac dual band 2.4/5 GHz b/g/n/ac dual band 2.4/5 GHz (optional) b/g/n single band 2.4 GHz b/g/n/ac dual band 2.4/5 GHz
Bluetooth None 5.2 BLE 4.2 BLE 4.1 BLE 4.2 LS BLE 5.0[111] 5.0, BLE (optional) 4.1 BLE 4.2 BLE 5.0
Low-level peripherals UART 8× GPIO[136] plus the following, which can also be used as GPIO: UART, I²C bus, SPI bus with two chip selects, I²S audio[137] +3.3 V, +5 V, ground[138][139] 17× GPIO plus the same specific functions, and HAT ID bus 8× GPIO plus the following, which can also be used as GPIO: UART, I²C bus, SPI bus with two chip selects, I²S audio +3.3 V, +5 V, ground. 17× GPIO plus the same specific functions, and HAT ID bus 17× GPIO plus the same specific functions, HAT, and an additional 4× UART, 4× SPI, and 4× I2C connectors.​[140] 46× GPIO, some of which can be used for specific functions including I²C, SPI, UART, PCM, PWM[a][141] 28 × GPIO supporting either 1.8v or 3.3v signalling and peripheral options 17× GPIO plus the same specific functions, and HAT ID bus[8] ?
Power ratings ? ? 300 mA (1.5 W)[142] 200 mA (1 W)[143] ? 700 mA (3.5 W) 200 mA (1 W) average when idle, 350 mA (1.75 W) maximum under stress (monitor, keyboard and mouse connected)​[144] 220 mA (1.1 W) average when idle, 820 mA (4.1 W) maximum under stress (monitor, keyboard and mouse connected)​[144] 300 mA (1.5 W) average when idle, 1.34 A (6.7 W) maximum under stress (monitor, keyboard, mouse and WiFi connected)​[144] 459 mA (2.295 W) average when idle, 1.13 A (5.661 W) maximum under stress (monitor, keyboard, mouse and WiFi connected)​[145] 600 mA (3 W) average when idle, 1.25 A (6.25 W) maximum under stress (monitor, keyboard, mouse and Ethernet connected),​[144] 3 A (15 W) power supply recommended.​[1] 200 mA (1 W) 700 mA (3.5 W) ? ? ? 100 mA (0.5 W) average when idle, 350 mA (1.75 W) maximum under stress (monitor, keyboard and mouse connected)​[144] 120 mA (0.6 W) average when idle[146] ?
Power source MicroUSB or GPIO Header 1.8 V to 5 V 5 V via MicroUSB or GPIO header 5 V via MicroUSB, GPIO header, or PoE (with the PoE HAT) 5 V via USB-C, GPIO header, or PoE (with the PoE HAT) 2.5–5 V, 3.3 V, 2.5–3.3 V, and 1.8 V[a] 5 V 5 V via MicroUSB or GPIO header ?
Size 51 x 21mm 85.6 mm × 56.5 mm
(3.37 in × 2.22 in)[i]		 65 mm × 56.5 mm × 10 mm
(2.56 in × 2.22 in × 0.39 in)[j]		 65 mm × 56.5 mm
(2.56 in × 2.22 in) 		85.60 mm × 56.5 mm
(3.370 in × 2.224 in)[i]		 85.60 mm × 56.5 mm × 17 mm
(3.370 in × 2.224 in × 0.669 in)[147]		 67.6 mm × 30 mm
(2.66 in × 1.18 in) 		67.6 mm × 31 mm
(2.66 in × 1.22 in) 		55 mm × 40 mm 65 mm × 30 mm × 5 mm
(2.56 in × 1.18 in × 0.20 in) 		286 mm × 113 mm × 23 mm
Weight ? ? 31 g
(1.1 oz) 		23 g
(0.81 oz) 		45 g
(1.6 oz) 		46 g
(1.6 oz)[148]		 7 g
(0.25 oz)[149]		 9 g
(0.32 oz)[150]		 10.8 g
(0.38 oz)
Console ? ? Adding a USB network interface via tethering[134] or a serial cable with optional GPIO power connector[151] ? ? ?
Generation ? ? 1 1+ 3+ 1 1+ 2 2 ver 1.2 3 3+ 4 1 3 3 Lite 3+ 3+ Lite 4 4 Lite PCB ver 1.2 PCB ver 1.3 W (wireless) 2 W (wireless) 4
Obsolescence
Statement 		in production until at least January 2028 in production until at least January 2026 in production until at least January 2026 — in production until at least January 2026 — see PCB ver 1.2 — see ver 1.2 in production until at least January 2026​[152] in production until at least January 2026 in production until at least January 2026 in production until at least January 2026 in production until at least January 2026 in production until at least January 2026 in production until at least January 2026 in production until at least January 2028 — or see PCB ver 1.3 in production until at least January 2026​[153] in production until at least January 2026 in production until at least January 2026 in production until at least January 2028 ?
Type Pico Model A (no Ethernet) Model B (with Ethernet) Compute Module[a] Zero Keyboard
  1. ^ a b c d e f g h i j k l 200-pin DDR2 SO-DIMM interface till CM3+,
  2. ^ a b BCM2837: 3D part of GPU at 300 MHz, video part of GPU at 400 MHz,[138][154] OpenGL ES 2.0 (BCM2835, BCM2836: 24 GFLOPS / BCM2837: 28.8 GFLOPS). MPEG-2 and VC-1 (with licence),[155] 1080p30 H.264/MPEG-4 AVC high-profile decoder and encoder[54] (BCM2837: 1080p60)
  3. ^ a b c d e f g h i j k Shared with GPU
  4. ^ a b c d e Direct from the BCM2835 chip
  5. ^ a b Direct from the BCM2837B0 chip
  6. ^ via on-board 3-port USB hub; one USB port internally connected to the Ethernet port.
  7. ^ via on-board 5-port USB hub; one USB port internally connected to the Ethernet port.
  8. ^ for raw LCD panels
  9. ^ a b Excluding protruding connectors
  10. ^ Same as HAT board.

Simplified Model B changelog

Model Gen Variant Year SoC Clockspeed Cores /
Threads 		64-bit GFLOPS RAM
(GB) 		Video
Output 		4K
Ready 		USB Alt
Boot 		Ethernet
(Max. Gbit/s) 		Wi-Fi BT Power Source MSRP
(USD)
1b1
RPi 1 Model B 		1B (256 MB)
1b1
2012 		BCM2835 0.7 GHz 1/1 0.213
00256
0.25 		HDMI1.3
Composite 		2 × USB2.0 0.1 Micro-USB $35
1b2
RPi 1 Model B 		1B (512 MB) 1/1 0.213
00512
0.5
1b3
RPi 1 Model B+ 		1B+
1b3
2014 		1/1 0.213 4 × USB2.0 $25
2b1
RPi 2 Model B 		2B
2b1
2015 		BCM2836 0.9 GHz 4/4 1.47
01024
1 		HDMI1.3 $35
2b2
RPi 2 Model B v1.2 		2B v1.2
2b2
2016 		BCM2837 ✔ 4.43
3b1
RPi 3 Model B 		3B 1.2 GHz ✔ 3.62 USB
Network
(through OTP bit setting) 		b/g/n
single-band
(2.4 GHz only)
 4.1 BLE
3b2
RPi 3 Model B+ 		3B+
3b2
2018 		BCM2837B0 1.4 GHz ✔ 5.3 USB
Network 		0.35 b/g/n/ac
dual-band
 4.2 LS BLE
4b1
RPi 4 Model B 		4B (1 GB)
4b1
2019 		BCM2711 1.5 GHz/1.8 GHz ✔ 9.92 2 × Micro-HDMI2.0 ✔ 2 × USB2.0
2 × USB3.0		 1.0 5.0 USB-C
4b2
RPi 4 Model B 		4B (2 GB) ✔
02048
2 		✔ $35
from $45
4b3
RPi 4 Model B 		4B (4 GB) ✔ 13.5
04096
4 		✔ $55
4b4
RPi 4 Model B 		4B (8 GB)
4b4
2020 		✔
08192
8 		✔ $75

Software

Operating systems

 
Various operating systems for the Raspberry Pi can be installed on a MicroSD or SD card, depending on the board and available adapters; seen here is the MicroSD slot located on the bottom of a Raspberry Pi 2 board.

The Raspberry Pi Foundation provides Raspberry Pi OS (formerly called Raspbian), a Debian-based Linux distribution for download, as well as third-party Ubuntu, Windows 10 IoT Core, RISC OS, LibreELEC (specialised media centre distribution)[156] and specialised distributions for the Kodi media centre and classroom management.[157] It promotes Python and Scratch as the main programming languages, with support for many other languages.[158] The default firmware is closed source, while unofficial open source is available.[159][160][161] Many other operating systems can also run on the Raspberry Pi. The formally verified microkernel seL4 is also supported.[162] There are several ways of installing multiple operating systems on one SD card.[163]

Other operating systems (not Linux- nor BSD-based)
  • Broadcom VCOS – Proprietary operating system which includes an abstraction layer designed to integrate with existing kernels, such as ThreadX (which is used on the VideoCore4 processor), providing drivers and middleware for application development. In the case of the Raspberry Pi, this includes an application to start the ARM processor(s) and provide the publicly documented API over a mailbox interface, serving as its firmware. An incomplete source of a Linux port of VCOS is available as part of the reference graphics driver published by Broadcom.[164]
  • Haiku – an open source BeOS clone that has been compiled for the Raspberry Pi and several other ARM boards.[165] Work on Pi 1 began in 2011, but only the Pi 2 will be supported.[166]
  • HelenOS – a portable microkernel-based multiserver operating system; has basic Raspberry Pi support since version 0.6.0[167]
  • Plan 9 from Bell Labs[168][169] and Inferno[170] (in beta)
  • QNX
  • RISC OS Pi (a special cut down version RISC OS Pico, for 16 MB cards and larger for all models of Pi 1 & 2, has also been made available.)
  • Ultibo Core – OS-less unikerel Run Time Library based on Free Pascal. Lazarus IDE (Windows with 3rd party ports to Linux and MacOS). Most Pi models supported.[171]
  • Windows 10 IoT Core – a zero-price edition of Windows 10 offered by Microsoft that runs natively on the Raspberry Pi 2.[172]
Other operating systems (Linux-based)
Other operating systems (BSD-based)

Driver APIs

See also: VideoCore § Linux support
 
Scheme of the implemented APIs: OpenMAX IL, OpenGL ES and OpenVG

Raspberry Pi can use a VideoCore IV GPU via a binary blob, which is loaded into the GPU at boot time from the SD-card, and additional software, that initially was closed source.[194] This part of the driver code was later released.[195] However, much of the actual driver work is done using the closed source GPU code. Application software makes calls to closed source run-time libraries (OpenMAX IL, OpenGL ES or OpenVG), which in turn call an open source driver inside the Linux kernel, which then calls the closed source VideoCore IV GPU driver code. The API of the kernel driver is specific for these closed libraries. Video applications use OpenMAX IL, 3D applications use OpenGL ES and 2D applications use OpenVG, which both in turn use EGL. OpenMAX IL and EGL use the open source kernel driver in turn.[196]

Vulkan driver

The Raspberry Pi Foundation first announced it was working on a Vulkan driver in February 2020.[197] A working Vulkan driver running Quake 3 at 100 frames per second on a 3B+ was revealed by a graphics engineer who had been working on it as a hobby project on 20 June.[198] On 24 November 2020 Raspberry Pi Foundation announced that their driver for the Raspberry Pi 4 is Vulkan 1.0 conformant.[199] Raspberry Pi Trading announced further driver conformance for Vulkan 1.1 and 1.2 on 26 October 2021[200] and 1 August 2022.[201]

Firmware

The official firmware is a freely redistributable[202] binary blob, that is proprietary software.[165] A minimal proof-of-concept open source firmware is also available, mainly aimed at initialising and starting the ARM cores as well as performing minimal startup that is required on the ARM side. It is also capable of booting a very minimal Linux kernel, with patches to remove the dependency on the mailbox interface being responsive. It is known to work on Raspberry Pi 1, 2 and 3, as well as some variants of Raspberry Pi Zero.[203]

Third-party application software

  • AstroPrint – AstroPrint's wireless 3D printing software can be run on the Pi 2.[204]
  • C/C++ Interpreter Ch – Released 3 January 2017, C/C++ interpreter Ch and Embedded Ch are released free for non-commercial use for Raspberry Pi, ChIDE is also included for the beginners to learn C/C++.[205]
  • Minecraft – Released 11 February 2013, a modified version that allows players to directly alter the world with computer code.[206]
  • RealVNC – Since 28 September 2016, Raspbian includes RealVNC's remote access server and viewer software.[207][208][209] This includes a new capture technology which allows directly rendered content (e.g. Minecraft, camera preview and omxplayer) as well as non-X11 applications to be viewed and controlled remotely.[210][211]
  • UserGate Web Filter – On 20 September 2013, Florida-based security vendor Entensys announced porting UserGate Web Filter to Raspberry Pi platform.[212]
  • Steam Link – On 13 December 2018, Valve released official Steam Link game streaming client for the Raspberry Pi 3 and 3 B+.[213][214]

Software development tools

  • Arduino IDE – for programming an Arduino.
  • Algoid – for teaching programming to children and beginners.
  • BlueJ – for teaching Java to beginners.
  • Greenfoot – Greenfoot teaches object orientation with Java. Create 'actors' which live in 'worlds' to build games, simulations, and other graphical programs.
  • Julia – an interactive and cross-platform programming language/environment, that runs on the Pi 1 and later.[215] IDEs for Julia, such as Visual Studio Code, are available. See also Pi-specific GitHub repository JuliaBerry.
  • Lazarus[216] – a Free Pascal RAD IDE
  • LiveCode – an educational RAD IDE descended from HyperCard using English-like language to write event-handlers for WYSIWYG widgets runnable on desktop, mobile and Raspberry Pi platforms.
  • Ninja-IDE – a cross-platform integrated development environment (IDE) for Python.
  • Processing – an IDE built for the electronic arts, new media art, and visual design communities with the purpose of teaching the fundamentals of computer programming in a visual context.
  • Scratch – a cross-platform teaching IDE using visual blocks that stack like Lego, originally developed by MIT's Life Long Kindergarten group. The Pi version is very heavily optimised[217] for the limited computer resources available and is implemented in the Squeak Smalltalk system. The latest version compatible with the 2B is 1.6.
  • Squeak Smalltalk – a full-scale open Smalltalk.
  • TensorFlow – an artificial intelligence framework developed by Google. The Raspberry Pi Foundation worked with Google to simplify the installation process through pre-built binaries.[218]
  • Thonny – a Python IDE for beginners.
  • V-Play Game Engine – a cross-platform development framework that supports mobile game and app development with the V-Play Game Engine, V-Play apps, and V-Play plugins.
  • Xojo – a cross-platform RAD tool that can create desktop, web and console apps for Pi 2 and Pi 3.
  • C-STEM Studio – a platform for hands-on integrated learning of computing, science, technology, engineering, and mathematics (C-STEM) with robotics.
  • Erlang – a functional language for building concurrent systems with light-weight processes and message passing.
  • LabVIEW Community Edition – a system-design platform and development environment for a visual programming language from National Instruments.

Accessories

 
Raspberry Pi 5 megapixel camera
 
Version 2 of the Pi Camera
 
Raspberry Pi High Quality Camera Module
 
Raspberry Pi 4 Model B with a "TV Hat" card (for DVB-T/T2 television reception) attached
  • Gertboard – A Raspberry Pi Foundation sanctioned device, designed for educational purposes, that expands the Raspberry Pi's GPIO pins to allow interface with and control of LEDs, switches, analogue signals, sensors and other devices. It also includes an optional Arduino compatible controller to interface with the Pi.[219]
  • Camera – On 14 May 2013, the foundation and the distributors RS Components & Premier Farnell/Element 14 launched the Raspberry Pi camera board alongside a firmware update to accommodate it.[220] The camera board is shipped with a flexible flat cable that plugs into the CSI connector which is located between the Ethernet and HDMI ports. In Raspbian, the user must enable the use of the camera board by running Raspi-config and selecting the camera option. The camera module costs €20 in Europe (9 September 2013).[221] It uses the OmniVision OV5647 image sensor and can produce 1080p, 720p and 640x480p video. The dimensions are 25 mm × 20 mm × 9 mm.[221] In May 2016, v2 of the camera was launched: it is an 8 megapixel camera using a Sony IMX219.[222] In January 2023, v3 of the camera was launched: it is an 12 megapixel camera using a Sony IMX708.[223]
  • Infrared Camera – In October 2013, the foundation announced that they would begin producing a camera module without an infrared filter, called the Pi NoIR.[224]
  • Official Display – On 8 September 2015, The foundation and the distributors RS Components & Premier Farnell/Element 14 launched the Raspberry Pi Touch Display[225]
  • HAT (Hardware Attached on Top) expansion boards – Together with the Model B+, inspired by the Arduino shield boards, the interface for HAT boards was devised by the Raspberry Pi Foundation. Each HAT board carries a small EEPROM (typically a CAT24C32WI-GT3)[226] containing the relevant details of the board,[227] so that the Raspberry Pi's OS is informed of the HAT, and the technical details of it, relevant to the OS using the HAT.[228] Mechanical details of a HAT board, which uses the four mounting holes in their rectangular formation, are available online.[229][230]
  • High Quality Camera – In May 2020, the 12.3 megapixel Sony IMX477 Exmor sensor camera module was released with support for C- and CS-mount lenses.[231] The unit initially retailed for US$50 with interchangeable lenses starting at US$25.

Vulnerability to flashes of light

In February 2015, a switched-mode power supply chip, designated U16, of the Raspberry Pi 2 Model B version 1.1 (the initially released version) was found to be vulnerable to flashes of light,[232] particularly the light from xenon camera flashes and green[233] and red laser pointers. The U16 chip has WL-CSP packaging, which exposes the bare silicon die. The Raspberry Pi Foundation blog recommended covering U16 with opaque material (such as Sugru or Blu-Tak) or putting the Raspberry Pi 2 in a case.[234][233] This issue was not discovered before the release of the Raspberry Pi 2 because it is not standard or common practice to test susceptibility to optical interference,[232] while commercial electronic devices are routinely subjected to tests of susceptibility to radio interference.

Reception and use

 
NASA's Open Source Rover powered by a Raspberry Pi 3

Technology writer Glyn Moody described the project in May 2011 as a "potential BBC Micro 2.0", not by replacing PC compatible machines but by supplementing them.[235] In March 2012 Stephen Pritchard echoed the BBC Micro successor sentiment in ITPRO.[236] Alex Hope, co-author of the Next Gen report, is hopeful that the computer will engage children with the excitement of programming.[237] Co-author Ian Livingstone suggested that the BBC could be involved in building support for the device, possibly branding it as the BBC Nano.[238] The Centre for Computing History strongly supports the Raspberry Pi project, feeling that it could "usher in a new era".[239] Before release, the board was showcased by ARM's CEO Warren East at an event in Cambridge outlining Google's ideas to improve UK science and technology education.[240]

Harry Fairhead, however, suggests that more emphasis should be put on improving the educational software available on existing hardware, using tools such as Google App Inventor to return programming to schools, rather than adding new hardware choices.[241] Simon Rockman, writing in a ZDNet blog, was of the opinion that teens will have "better things to do", despite what happened in the 1980s.[242]

In October 2012, the Raspberry Pi won T3's Innovation of the Year award,[243] and futurist Mark Pesce cited a (borrowed) Raspberry Pi as the inspiration for his ambient device project MooresCloud.[244] In October 2012, the British Computer Society reacted to the announcement of enhanced specifications by stating, "it's definitely something we'll want to sink our teeth into."[245]

In June 2017, Raspberry Pi won the Royal Academy of Engineering MacRobert Award.[246] The citation for the award to the Raspberry Pi said it was "for its inexpensive credit card-sized microcomputers, which are redefining how people engage with computing, inspiring students to learn coding and computer science and providing innovative control solutions for industry."[247]

Clusters of hundreds of Raspberry Pis have been used for testing programs destined for supercomputers.[248]

Community

The Raspberry Pi community was described by Jamie Ayre of FOSS software company AdaCore as one of the most exciting parts of the project.[249] Community blogger Russell Davis said that the community strength allows the Foundation to concentrate on documentation and teaching.[249] The community developed a fanzine around the platform called The MagPi[250] which in 2015, was handed over to the Raspberry Pi Foundation by its volunteers to be continued in-house.[251] A series of community Raspberry Jam events have been held across the UK and around the world.[252]

Education

As of January 2012, enquiries about the board in the United Kingdom have been received from schools in both the state and private sectors, with around five times as much interest from the latter. It is hoped that businesses will sponsor purchases for less advantaged schools.[253] The CEO of Premier Farnell said that the government of a country in the Middle East has expressed interest in providing a board to every schoolgirl, to enhance her employment prospects.[254][255]

In 2014, the Raspberry Pi Foundation hired a number of its community members including ex-teachers and software developers to launch a set of free learning resources for its website.[256] The Foundation also started a teacher training course called Picademy with the aim of helping teachers prepare for teaching the new computing curriculum using the Raspberry Pi in the classroom.[257]

In 2018, NASA launched the JPL Open Source Rover Project, which is a scaled down version of Curiosity rover and uses a Raspberry Pi as the control module, to encourage students and hobbyists to get involved in mechanical, software, electronics, and robotics engineering.[258]

Home automation

There are a number of developers and applications that are using the Raspberry Pi for home automation. These programmers are making an effort to modify the Raspberry Pi into a cost-affordable solution in energy monitoring and power consumption. Because of the relatively low cost of the Raspberry Pi, this has become a popular and economical alternative to the more expensive commercial solutions.[citation needed]

Industrial automation

In June 2014, Polish industrial automation manufacturer TECHBASE released ModBerry, an industrial computer based on the Raspberry Pi Compute Module. The device has a number of interfaces, most notably RS-485/232 serial ports, digital and analogue inputs/outputs, CAN and economical 1-Wire buses, all of which are widely used in the automation industry. The design allows the use of the Compute Module in harsh industrial environments, leading to the conclusion that the Raspberry Pi is no longer limited to home and science projects, but can be widely used as an Industrial IoT solution and achieve goals of Industry 4.0.[259]

In March 2018, SUSE announced commercial support for SUSE Linux Enterprise on the Raspberry Pi 3 Model B to support a number of undisclosed customers implementing industrial monitoring with the Raspberry Pi.[260]

In January 2021, TECHBASE announced a Raspberry Pi Compute Module 4 cluster for AI accelerator, routing and file server use. The device contains one or more standard Raspberry Pi Compute Module 4s in an industrial DIN rail housing, with some versions containing one or more Coral Edge tensor processing units.[261]

Commercial products

The Organelle is a portable synthesizer, a sampler, a sequencer, and an effects processor designed and assembled by Critter & Guitari. It incorporates a Raspberry Pi computer module running Linux.[262]

OTTO is a digital camera created by Next Thing Co. It incorporates a Raspberry Pi Compute Module. It was successfully crowd-funded in a May 2014 Kickstarter campaign.[263]

Slice is a digital media player which also uses a Compute Module as its heart. It was crowd-funded in an August 2014 Kickstarter campaign. The software running on Slice is based on Kodi.[264]

Numerous commercial thin client computer terminals use the Raspberry Pi.[265]

AutoPi TMU device is a telematics unit which is built on top of a Raspberry Pi Compute Module 4 and incorporates the philosophy of which Raspberry Pi was built upon.[266]

COVID-19 pandemic

During the COVID-19 pandemic, demand increased primarily due to the increase in remote work, but also because of the use of many Raspberry Pi Zeros in ventilators for COVID-19 patients in countries such as Colombia,[267] which were used to combat strain on the healthcare system. In March 2020, Raspberry Pi sales reached 640,000 units, the second largest month of sales in the company's history.[268]

Astro Pi and Proxima

A project was launched in December 2014 at an event held by the UK Space Agency. The Astro Pi was an augmented Raspberry Pi that included a sensor hat with a visible light or infrared camera. The Astro Pi competition, called Principia, was officially opened in January and was opened to all primary and secondary school aged children who were residents of the United Kingdom. During his mission, British ESA astronaut Tim Peake deployed the computers on board the International Space Station.[269] He loaded the winning code while in orbit, collected the data generated and then sent this to Earth where it was distributed to the winning teams. Covered themes during the competition included spacecraft sensors, satellite imaging, space measurements, data fusion and space radiation.

The organisations involved in the Astro Pi competition include the UK Space Agency, UKspace, Raspberry Pi, ESERO-UK and ESA.

In 2017, the European Space Agency ran another competition open to all students in the European Union called Proxima. The winning programs were run on the ISS by Thomas Pesquet, a French astronaut.[270] In December 2021, the Dragon 2 spacecraft launched by NASA had a pair of Astro Pi in it.[271]

History

 
An early alpha-test board in operation using different layout from later beta and production boards

The computer is inspired by Acorn's BBC Micro of 1981.[272][273] The Model A, Model B and Model B+ names are references to the original models of the British educational BBC Micro computer, developed by Acorn Computers.[274]

According to Upton, the name "Raspberry Pi" was chosen with "Raspberry" as an ode to a tradition of naming early computer companies after fruit, and "Pi" as a reference to the Python programming language.[275]

In 2006, early concepts of the Raspberry Pi were based on the Atmel ATmega644 microcontroller. Its schematics and PCB layout are publicly available.[276] Foundation trustee Eben Upton assembled a group of teachers, academics and computer enthusiasts to devise a computer to inspire children.[253]

The first ARM prototype version of the computer was mounted in a package the same size as a USB memory stick.[277] It had a USB port on one end and an HDMI port on the other.

The Foundation's goal was to offer two versions, priced at US$25 and $35. They started accepting orders for the higher priced Model B on 29 February 2012,[278] the lower cost Model A on 4 February 2013.[279] and the even lower cost (US$20) A+ on 10 November 2014.[108] On 26 November 2015, the cheapest Raspberry Pi yet, the Raspberry Pi Zero, was launched at US$5 or £4.[280]

Pre-launch

  • July 2011 (2011-07): Trustee Eben Upton publicly approached the RISC OS Open community in July 2011 to enquire about assistance with a port.[281] Adrian Lees at Broadcom has since worked on the port,[282][283] with his work being cited in a discussion regarding the graphics drivers.[284] This port is now included in NOOBS.
  • August 2011 – 50 alpha boards are manufactured. These boards were functionally identical to the planned Model B,[285] but they were physically larger to accommodate debug headers. Demonstrations of the board showed it running the LXDE desktop on Debian, Quake 3 at 1080p,[286] and Full HD MPEG-4 video over HDMI.[287]
  • October 2011 – A version of RISC OS 5 was demonstrated in public, and following a year of development the port was released for general consumption in November 2012.[288][289][290][291]
  • December 2011 – Twenty-five Model B Beta boards were assembled and tested[292] from one hundred unpopulated PCBs.[293] The component layout of the Beta boards was the same as on production boards. A single error was discovered in the board design where some pins on the CPU were not held high; it was fixed for the first production run.[294] The Beta boards were demonstrated booting Linux, playing a 1080p movie trailer and the Rightware Samurai OpenGL ES benchmark.[295]
  • Early 2012 – During the first week of the year, the first 10 boards were put up for auction on eBay.[296][297] One was bought anonymously and donated to the museum at The Centre for Computing History in Cambridge, England.[239][298] The ten boards (with a total retail price of £220) together raised over £16,000,[299] with the last to be auctioned, serial number No. 01, raising £3,500.[300] In advance of the anticipated launch at the end of February 2012, the Foundation's servers struggled to cope with the load placed by watchers repeatedly refreshing their browsers.[301]

Launch

  • 19 February 2012 – The first proof of concept SD card image that could be loaded onto an SD card to produce a preliminary operating system is released. The image was based on Debian 6.0 (Squeeze), with the LXDE desktop and the Midori browser, plus various programming tools. The image also runs on QEMU allowing the Raspberry Pi to be emulated on various other platforms.[302][303]
  • 29 February 2012 – Initial sales commence 29 February 2012[304] at 06:00 UTC;. At the same time, it was announced that the model A, originally to have had 128 MB of RAM, was to be upgraded to 256 MB before release.[278] The Foundation's website also announced: "Six years after the project's inception, we're nearly at the end of our first run of development – although it's just the beginning of the Raspberry Pi story."[305] The web-shops of the two licensed manufacturers selling Raspberry Pi's within the United Kingdom, Premier Farnell and RS Components, had their websites stalled by heavy web traffic immediately after the launch (RS Components briefly going down completely).[306][307] Unconfirmed reports suggested that there were over two million expressions of interest or pre-orders.[308] The official Raspberry Pi Twitter account reported that Premier Farnell sold out within a few minutes of the initial launch, while RS Components took over 100,000 pre orders on day one.[278] Manufacturers were reported in March 2012 to be taking a "healthy number" of pre-orders.[249]
  • March 2012 – Shipping delays for the first batch were announced in March 2012, as the result of installation of an incorrect Ethernet port,[309][310] but the Foundation expected that manufacturing quantities of future batches could be increased with little difficulty if required.[311] "We have ensured we can get them [the Ethernet connectors with magnetics] in large numbers and Premier Farnell and RS Components [the two distributors] have been fantastic at helping to source components," Upton said. The first batch of 10,000 boards was manufactured in Taiwan and China.[312][313]
  • 8 March 2012 – Release Raspberry Pi Fedora Remix, the recommended Linux distribution,[314] developed at Seneca College in Canada.[315]
  • March 2012 – The Debian port is initiated by Mike Thompson, former CTO of Atomz. The effort was largely carried out by Thompson and Peter Green, a volunteer Debian developer, with some support from the Foundation, who tested the resulting binaries that the two produced during the early stages (neither Thompson nor Green had physical access to the hardware, as boards were not widely accessible at the time due to demand).[316] While the preliminary proof of concept image distributed by the Foundation before launch was also Debian-based, it differed from Thompson and Green's Raspbian effort in a couple of ways. The POC image was based on then-stable Debian Squeeze, while Raspbian aimed to track then-upcoming Debian Wheezy packages.[303] Aside from the updated packages that would come with the new release, Wheezy was also set to introduce the armhf architecture,[317] which became the raison d'être for the Raspbian effort. The Squeeze-based POC image was limited to the armel architecture, which was, at the time of Squeeze's release, the latest attempt by the Debian project to have Debian run on the newest ARM embedded-application binary interface (EABI).[318] The armhf architecture in Wheezy intended to make Debian run on the ARM VFP hardware floating-point unit, while armel was limited to emulating floating point operations in software.[319][320] Since the Raspberry Pi included a VFP, being able to make use of the hardware unit would result in performance gains and reduced power use for floating point operations.[316] The armhf effort in mainline Debian, however, was orthogonal to the work surrounding the Pi and only intended to allow Debian to run on ARMv7 at a minimum, which would mean the Pi, an ARMv6 device, would not benefit.[317] As a result, Thompson and Green set out to build the 19,000 Debian packages for the device using a custom build cluster.[316]

Post-launch

  • 16 April 2012 – Reports appear from the first buyers who had received their Raspberry Pi.[321][322]
  • 20 April 2012 – The schematics for the Model A and Model B are released.[323]
  • 18 May 2012 – The Foundation reported on its blog about a prototype camera module they had tested.[324] The prototype used a 14-megapixel module.
  • 22 May 2012 – Over 20,000 units had been shipped.[325]
  • July 2012 – Release of Raspbian.[326]
  • 16 July 2012 – It was announced that 4,000 units were being manufactured per day, allowing Raspberry Pis to be bought in bulk.[327][328]
  • 24 August 2012 – Hardware accelerated video (H.264) encoding becomes available after it became known that the existing licence also covered encoding. Formerly it was thought that encoding would be added with the release of the announced camera module.[329][330] However, no stable software exists for hardware H.264 encoding.[331] At the same time the Foundation released two additional codecs that can be bought separately, MPEG-2 and Microsoft's VC-1. Also it was announced that the Pi will implement CEC, enabling it to be controlled with the television's remote control.[155]
  • 5 September 2012 – The Foundation announced a second revision of the Raspberry Pi Model B.[332] A revision 2.0 board is announced, with a number of minor corrections and improvements.[333]
  • 6 September 2012 – Announcement that in future the bulk of Raspberry Pi units would be manufactured in the UK, at Sony's manufacturing facility in Pencoed, Wales. The Foundation estimated that the plant would produce 30,000 units per month, and would create about 30 new jobs.[334][335]
  • 15 October 2012 – It is announced that new Raspberry Pi Model Bs are to be fitted with 512 MB instead of 256 MB RAM.[336]
  • 24 October 2012 – The Foundation announces that "all of the VideoCore driver code which runs on the ARM" had been released as free software under a BSD-style licence, making it "the first ARM-based multimedia SoC with fully-functional, vendor-provided (as opposed to partial, reverse engineered) fully open-source drivers", although this claim has not been universally accepted.[195] On 28 February 2014, they also announced the release of full documentation for the VideoCore IV graphics core, and a complete source release of the graphics stack under a 3-clause BSD licence[337][338]
  • October 2012 – It was reported that some customers of one of the two main distributors had been waiting more than six months for their orders. This was reported to be due to difficulties in sourcing the CPU and conservative sales forecasting by this distributor.[339]
  • 17 December 2012 – The Foundation, in collaboration with IndieCity and Velocix, opens the Pi Store, as a "one-stop shop for all your Raspberry Pi (software) needs". Using an application included in Raspbian, users can browse through several categories and download what they want. Software can also be uploaded for moderation and release.[340]
  • 3 June 2013 – "New Out of Box Software" or NOOBS is introduced. This makes the Raspberry Pi easier to use by simplifying the installation of an operating system. Instead of using specific software to prepare an SD card, a file is unzipped and the contents copied over to a FAT formatted (4 GB or bigger) SD card. That card can then be booted on the Raspberry Pi and a choice of six operating systems is presented for installation on the card. The system also contains a recovery partition that allows for the quick restoration of the installed OS, tools to modify the config.txt and an online help button and web browser which directs to the Raspberry Pi Forums.[341]
  • October 2013 – The Foundation announces that the one millionth Pi had been manufactured in the United Kingdom.[342]
  • November 2013: they announce that the two millionth Pi shipped between 24 and 31 October.[343]
  • 28 February 2014 – On the day of the second anniversary of the Raspberry Pi, Broadcom, together with the Raspberry Pi foundation, announced the release of full documentation for the VideoCore IV graphics core,[clarification needed] and a complete source release of the graphics stack under a 3-clause BSD licence.[337][338]

 
Raspberry Pi Compute Module
 
Raspberry Pi Model B
 
Compute Module 4
  • 7 April 2014 – The official Raspberry Pi blog announced the Raspberry Pi Compute Module, a device in a 200-pin DDR2 SO-DIMM-configured memory module (though not in any way compatible with such RAM), intended for consumer electronics designers to use as the core of their own products.[118]
  • June 2014 – The official Raspberry Pi blog mentioned that the three millionth Pi shipped in early May 2014.[344]
  • 14 July 2014 – The official Raspberry Pi blog announced the Raspberry Pi Model B+, "the final evolution of the original Raspberry Pi. For the same price as the original Raspberry Pi model B, but incorporating numerous small improvements people have been asking for".[109]
  • 10 November 2014 – The official Raspberry Pi blog announced the Raspberry Pi Model A+.[108] It is the smallest and cheapest (US$20) Raspberry Pi so far and has the same processor and RAM as the Model A. Like the A, it has no Ethernet port, and only one USB port, but does have the other innovations of the B+, like lower power, micro-SD-card slot, and 40-pin HAT compatible GPIO.
  • 2 February 2015 – The official Raspberry Pi blog announced the Raspberry Pi 2. Looking like a Model B+, it has a 900 MHz quad-core ARMv7 Cortex-A7 CPU, twice the memory (for a total of 1 GB) and complete compatibility with the original generation of Raspberry Pis.[345]
  • 14 May 2015 – The price of Model B+ was decreased from US$35 to $25, purportedly as a "side effect of the production optimizations" from the Pi 2 development.[346] Industry observers have sceptically noted, however, that the price drop appeared to be a direct response to the CHIP, a lower-priced competitor discontinued in April 2017.[347]
  • 29 September 2015 – A new version of the Raspbian operating system, based on Debian Jessie, is released.[348]
  • 26 November 2015 – The Raspberry Pi Foundation launched the Raspberry Pi Zero, the smallest and cheapest member of the Raspberry Pi family yet, at 65 mm × 30 mm, and US$5. The Zero is similar to the Model A+ without camera and LCD connectors, while smaller and uses less power. It was given away with the Raspberry Pi magazine Magpi No. 40 that was distributed in the UK and US that day – the MagPi was sold out at almost every retailer internationally due to the freebie.[8]
  • 29 February 2016 – Raspberry Pi 3 with a BCM2837 1.2 GHz 64-bit quad processor based on the ARMv8 Cortex-A53, with built-in Wi-Fi BCM43438 802.11n 2.4 GHz and Bluetooth 4.1 Low Energy (BLE). Starting with a 32-bit Raspbian version, with a 64-bit version later to come if "there is value in moving to 64-bit mode". In the same announcement it was said that a new BCM2837 based Compute Module was expected to be introduced a few months later.[69]
  • February 2016 – The Raspberry Pi Foundation announces that they had sold eight million devices (for all models combined), making it the best-selling UK personal computer, ahead of the Amstrad PCW.[349][69] Sales reached ten million in September 2016.[18]
  • 25 April 2016 – Raspberry Pi Camera v2.1 announced with 8 Mpixels, in normal and NoIR (can receive IR) versions. The camera uses the Sony IMX219 chip with a resolution of 3280 × 2464. To make use of the new resolution the software has to be updated.[350]
  • 10 October 2016 – NEC Display Solutions announces that select models of commercial displays to be released in early 2017 will incorporate a Raspberry Pi 3 Compute Module.[351]
  • 14 October 2016 – Raspberry Pi Foundation announces their co-operation with NEC Display Solutions. They expect that the Raspberry Pi 3 Compute Module will be available to the general public by the end of 2016.[352]
  • 25 November 2016 – 11 million units sold.[353]
  • 16 January 2017 – Compute Module 3 and Compute Module 3 Lite are launched.[114]
  • 28 February 2017 – Raspberry Pi Zero W with WiFi and Bluetooth via chip scale antennas launched.[354][355]
  • 17 August 2017 – The Raspbian operating system is upgraded to a new version, based on Debian Stretch.[356]
  • 14 March 2018 – On Pi Day, Raspberry Pi Foundation introduced Raspberry Pi 3 Model B+ with improvements in the Raspberry PI 3B computers performance, updated version of the Broadcom application processor, better wireless Wi-Fi and Bluetooth performance and addition of the 5 GHz band.[357]
  • 15 November 2018 – Raspberry Pi 3 Model A+ launched.[358]
  • 28 January 2019 – Compute Module 3+ (CM3+/Lite, CM3+/8 GB, CM3+/16 GB and CM3+/32 GB) launched.[115]
  • 24 June 2019 – Raspberry Pi 4 Model B launched,[1] along with a new version of the Raspbian operating system based on Debian Buster.[359]
  • 10 December 2019 – 30 million units sold;[360] sales are about 6 million per year.[361][362]
  • 28 May 2020 – An 8GB version of the Raspberry Pi 4 is announced for $75.[363] Raspberry Pi OS is split off from Raspbian, and now includes a beta of a 64-bit version that allows programs to use more than 4GB of RAM.[364]
  • 19 October 2020 – Compute Module 4 launched.[365]
  • 2 November 2020 – Raspberry Pi 400 launched. It is a keyboard which incorporates Raspberry Pi 4 into it. GPIO pins of the Raspberry Pi 4 are accessible.[366]
  • 21 January 2021 – Raspberry Pi Pico launched. It is the first microcontroller-class product from Raspberry Pi. It is based on RP2040 Microcontroller developed by Raspberry Pi.[42]
  • 11 May 2021 – 40 million units sold.[367]
  • 21 September 2021 – 42 million units sold.[368]
  • 30 October 2021 – Raspberry Pi OS (formerly Raspbian) is updated version 11, based on Debian Bullseye.[369] With this release, the default clock speed for revision 1.4 of the Raspberry Pi 4 is increased to 1.8 GHz.[33]
  • 16 November 2021 – 43 million units sold.[370]
  • 28 February 2022, exactly 10 years after the first shipment, 46 million units sold.[371]
 
Raspberry Pi Cumulative Shipment Units (mil)

Sales

According to the Raspberry Pi Foundation, more than 5 million Raspberry Pis were sold by February 2015, making it the best-selling British computer.[24] By November 2016 they had sold 11 million units,[353][372] and 12.5 million by March 2017, making it the third best-selling "general purpose computer".[373] In July 2017, sales reached nearly 15 million,[374] climbing to 19 million in March 2018.[27] By December 2019, a total of 30 million devices had been sold.[375][non-primary source needed]

Supply difficulties

In 2021 and continuing through 2022, there are significant availability issues and Raspberry Pi products are difficult to obtain.[376] The company explained its approach to the shortages in 2021 [377] and April 2022,[378] explaining that it was prioritising business and industrial customers; however major distributors are showing lead times in excess of 12 months on all products.

The situation is sufficiently long term that at least one automated stock checker is online.[379]

See also

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May 01, 2023
raspberry, redirects, here, other, uses, dessert, raspberry, series, small, single, board, computers, sbcs, developed, united, kingdom, foundation, association, with, broadcom, project, originally, leaned, towards, promotion, teaching, basic, computer, science. RPi redirects here For other uses see RPI For the dessert see Raspberry pie Raspberry Pi p aɪ is a series of small single board computers SBCs developed in the United Kingdom by the Raspberry Pi Foundation in association with Broadcom 14 The Raspberry Pi project originally leaned towards the promotion of teaching basic computer science in schools 15 16 17 The original model became more popular than anticipated 18 selling outside its target market for uses such as robotics It is widely used in many areas such as for weather monitoring 19 because of its low cost modularity and open design It is typically used by computer and electronic hobbyists due to its adoption of the HDMI and USB standards Raspberry PiRaspberry Pi 4 Model BAlso known asRPi RaspiRelease date29 February 2012 11 years ago 2012 02 29 Project 24 June 2019 3 years ago 2019 06 24 Current gen Introductory priceUS 4 00 Pi Pico US 35 00 Pi 4 1GB RAM US 45 00 Pi 4 2GB RAM US 55 00 Pi 4 4GB RAM 1 US 75 00 Pi 4 8GB RAM 2 US 70 00 Pi 400 4 GB 3 Operating systemLinux incl Raspberry Pi OS FreeBSDNetBSDOpenBSDPlan 9RISC OSWindows 10 ARM64Windows 10 IoT Core 4 and OS less Embedded RTL s clarification needed System on a chipPi 3 A Broadcom BCM2837B0 wbr 5 Pi 4 B Broadcom BCM2711B0 wbr 5 Zero W Broadcom BCM2835 wbr 5 CM 3 Broadcom BCM2837B0 wbr 6 CPUPi 3 A 1 4 GHz quad core A53 64 bit 5 Pi 4 B 1 5 GHz quad core A72 64 bit 5 Zero W 1 GHz ARM11 32 bit 5 CM 3 1 2 GHz quad core A53 64 bit 6 MemoryPi 3 A 512 MB LPDDR2 SDRAM 5 Pi 4 B 1 2 4 or 8 GB LPDDR4 3200 SDRAM 7 2 Zero W 512 MB LPDDR2 SDRAM 8 CM 3 1 GB LPDDR2 SDRAM 6 StorageMicroSDXC slot USB Mass Storage device for booting 9 GraphicsPi 3 A Broadcom VideoCore IV 400 MHz 10 Pi 4 B Broadcom VideoCore VI 500 MHz 11 Zero W Broadcom VideoCore IV 12 CM 3 Broadcom VideoCore IV 10 Power5 V 3 A for full power delivery to USB devices 13 Websitewww wbr raspberrypi wbr comAfter the release of the second board type the Raspberry Pi Foundation set up a new entity named Raspberry Pi Trading and installed Eben Upton as CEO with the responsibility of developing technology 20 The Foundation was rededicated as an educational charity for promoting the teaching of basic computer science in schools and developing countries Most Pis are made in a Sony factory in Pencoed Wales 21 while others are made in China and Japan 22 23 In 2015 the Raspberry Pi surpassed the ZX Spectrum in unit sales becoming the best selling British computer 24 Contents 1 Series and generations 1 1 Raspberry Pi 1 2 Raspberry Pi Zero 1 3 Raspberry Pi Pico 1 4 Model comparison 2 Hardware 2 1 Processor 2 1 1 Performance 2 1 2 Overclocking 2 2 RAM 2 3 Networking 2 4 Special purpose features 2 5 Peripherals 2 6 Video 2 7 Real time clock 3 Connectors 3 1 Pi Pico 3 2 Pi Compute Module 3 3 Pi Zero 3 4 Model A 3 5 Model B 3 6 J8 header and general purpose input output GPIO 4 Specifications 4 1 Simplified Model B changelog 5 Software 5 1 Operating systems 6 Driver APIs 6 1 Vulkan driver 6 2 Firmware 6 3 Third party application software 6 4 Software development tools 7 Accessories 8 Vulnerability to flashes of light 9 Reception and use 9 1 Community 9 2 Education 9 3 Home automation 9 4 Industrial automation 9 5 Commercial products 9 6 COVID 19 pandemic 10 Astro Pi and Proxima 11 History 11 1 Pre launch 11 2 Launch 11 3 Post launch 12 Sales 13 Supply difficulties 14 See also 15 References 16 Further reading 17 External linksSeries and generations Edit The Raspberry Pi Zero introduced in 2015 The Raspberry Pi 3 B introduced in 2018 The Raspberry Pi 4 B introduced in 2019 The Raspberry Pi Pico introduced in 2021 The Raspberry Pi Zero 2 W introduced in 2021 There are three series of Raspberry Pi and several generations of each have been released Raspberry Pi SBCs feature a Broadcom system on a chip SoC with an integrated ARM compatible central processing unit CPU and on chip graphics processing unit GPU while Raspberry Pi Pico has a RP2040 system on chip with an integrated ARM compatible central processing unit CPU Raspberry Pi Edit The first generation Raspberry Pi Model B was released in February 2012 followed by the simpler and cheaper Model A In 2014 the Foundation released a board with an improved design Raspberry Pi Model B These first generation boards feature ARM11 processors are approximately credit card sized and represent the standard mainline form factor Improved A and B models were released within a year A Compute Module was released in April 2014 for embedded applications The Raspberry Pi 2 was released in February 2015 and initially featured a 900 MHz 32 bit quad core ARM Cortex A7 processor with 1 GB RAM Revision 1 2 featured a 900 MHz 64 bit quad core ARM Cortex A53 processor the same as that in the Raspberry Pi 3 Model B but underclocked to 900 MHz 25 The Raspberry Pi 3 Model B was released in February 2016 with a 1 2 GHz 64 bit quad core ARM Cortex A53 processor on board 802 11n Wi Fi Bluetooth and USB boot capabilities 26 On Pi Day 2018 the Raspberry Pi 3 Model B was launched with a faster 1 4 GHz processor a three times faster Gigabit Ethernet throughput limited to ca 300 Mbit s by the internal USB 2 0 connection and 2 4 5 GHz dual band 802 11ac Wi Fi 100 Mbit s 27 Other features are Power over Ethernet PoE with the add on PoE HAT USB boot and network boot an SD card is no longer required The Raspberry Pi 4 Model B was released in June 2019 1 with a 1 5 GHz 64 bit quad core ARM Cortex A72 processor on board 802 11ac Wi Fi Bluetooth 5 full gigabit Ethernet throughput not limited two USB 2 0 ports two USB 3 0 ports 1 8 GB of RAM and dual monitor support via a pair of micro HDMI HDMI Type D ports for up to 4K resolution The version with 1 GB RAM has been abandoned and the prices of the 2 GB version have been reduced The 8 GB version has a revised circuit board The Pi 4 is also powered via a USB C port enabling additional power to be provided to downstream peripherals when used with an appropriate PSU But the Pi can only be operated with 5 volts and not 9 or 12 volts like other mini computers of this class The initial Raspberry Pi 4 board has a design flaw where third party e marked USB cables such as those used on Apple MacBooks incorrectly identify it and refuse to provide power 28 29 Tom s Hardware tested 14 different cables and found that 11 of them turned on and powered the Pi without issue 30 The design flaw was fixed in revision 1 2 of the board released in late 2019 31 In mid 2021 Pi 4 B models appeared with the improved Broadcom BCM2711C0 The manufacturer is now using this chip for the Pi 4 B and Pi 400 However the clock frequency of the Pi 4 B was not increased in the factory Raspberry Pi 400 Kit The Raspberry Pi 400 was released in November 2020 A modern example of a keyboard computer it features 4 GB of LPDDR4 RAM on a custom board derived from the existing Raspberry Pi 4 combined with a keyboard in a single case The case was derived from that of the Raspberry Pi Keyboard 32 A robust cooling solution i e a broad metal plate and an upgraded switched mode power supply 33 allow the Raspberry Pi 400 s Broadcom BCM2711C0 processor to be clocked at 1 8 GHz which is 20 faster than the Raspberry Pi 4 upon which it is based 34 Raspberry Pi Zero Edit A Raspberry Pi Zero with smaller size and reduced input output I O and general purpose input output GPIO capabilities was released in November 2015 for US 5 On 16 May 2016 the Raspberry Pi Zero v1 3 was released which added a camera connector 35 On 28 February 2017 the Raspberry Pi Zero W was launched a version of the Zero with Wi Fi and Bluetooth capabilities for US 10 36 37 On 12 January 2018 the Raspberry Pi Zero WH was launched a version of the Zero W with pre soldered GPIO headers 38 On 28 October 2021 the Raspberry Pi Zero 2 W was launched a version of the Zero W with a system in a package SiP designed by Raspberry Pi and based on the Raspberry Pi 3 39 In contrast to the older Zero models the Pi Zero 2 W is 64 bit capable The price is around US 15 Raspberry Pi Pico Edit Raspberry Pi Pico was released in January 2021 with a retail price of 4 40 It was Raspberry Pi s first board based upon a single microcontroller chip the RP2040 which was designed by Raspberry Pi in the UK 41 The Pico has 264 KB of RAM and 2 MB of flash memory It is programmable in C C Assembly MicroPython CircuitPython and Rust The Raspberry Pi Foundation has partnered with Adafruit Pimoroni Arduino and SparkFun to build accessories for Raspberry Pi Pico and variety of other boards using RP2040 Silicon Platform 42 Rather than perform the role of general purpose computer like the others in the range it is designed for physical computing similar in concept to an Arduino 43 On 30 June 2022 the Raspberry Pi Pico W was launched a version of the Pico with 802 11n Wi Fi capability for US 6 The CYW43439 wireless chip in the Pico W also supports Bluetooth but the capability was not enabled at launch 44 Model comparison Edit Family Model SoC Memory Form Factor Ethernet Wireless GPIO Released DiscontinuedRaspberry Pi B BCM2835 256 MB Standard a Yes No 26 pin 2012 Yes 512 MB 2012 45 A 256 MB No 2013 NoB 512 MB Yes 40 pin 2014A Compact b NoRaspberry Pi 2 B BCM2836 7 1 GB Standard a Yes No 2015Raspberry Pi Zero Zero BCM2835 512 MB Ultra compact c No NoW WH Yes 20172 W BCM2710A1 d 46 2021Raspberry Pi 3 B BCM2837A0 B0 1 GB Standard a Yes Yes 2016A BCM2837B0 512 MB Compact b No Yes e 2018B 1 GB Standard a Yes f 2018Raspberry Pi 4 B BCM2711 1 GB Standard a Yes g Yes e 2019 47 Yes 2020 48 2021 49 No2 GB 2019 47 4 GB8 GB 2020400 4 GB KeyboardRaspberry Pi Pico Pico RP2040 264 KB Pico h No No 2021W Yes i 2022 a b c d e 85 6 mm 56 5 mm 3 37 in 2 22 in a b 65 mm 56 5 mm 2 56 in 2 22 in 65 mm 30 mm 2 6 in 1 2 in Custom Raspberry Pi SiP RP3A0 a b Dual band Gigabit Ethernet Throughput limited to ca 300 Mbit s by the internal USB 2 0 connection Gigabit Ethernet 21 mm 51 mm 0 83 in 2 01 in 2 4 GHz band As of 4 May 2021 the Foundation is committed to manufacture most Pi models until at least January 2026 Even the 1 GB Pi 4B can still be specially ordered 50 Hardware EditThis section needs additional citations for verification Please help improve this article by adding citations to reliable sources in this section Unsourced material may be challenged and removed Find sources Raspberry Pi news newspapers books scholar JSTOR November 2020 Learn how and when to remove this template message The Raspberry Pi hardware has evolved through several versions that feature variations in the type of the central processing unit amount of memory capacity networking support and peripheral device support Block diagram describing models B B A and A This block diagram describes models B B A and A The Pi Zero models are similar but lack the Ethernet and USB hub components The Ethernet adapter is internally connected to an additional USB port In Model A A and the Pi Zero the USB port is connected directly to the system on a chip SoC On the Pi 1 Model B and later models the USB Ethernet chip contains a five port USB hub of which four ports are available while the Pi 1 Model B only provides two On the Pi Zero the USB port is also connected directly to the SoC but it uses a micro USB OTG port Unlike all other Pi models the 40 pin GPIO connector is omitted on the Pi Zero with solderable through holes only in the pin locations The Pi Zero WH remedies this Processor speed ranges from 700 MHz to 1 4 GHz for the Pi 3 Model B or 1 5 GHz for the Pi 4 on board memory ranges from 256 MB to 8 GB random access memory RAM with only the Raspberry Pi 4 having more than 1 GB Secure Digital SD cards in MicroSDHC form factor SDHC on early models are used to store the operating system and program memory however some models also come with onboard eMMC storage 51 and the Raspberry Pi 4 can also make use of USB attached SSD storage for its operating system 52 The boards have one to five USB ports For video output HDMI and composite video are supported with a standard 3 5 mm tip ring sleeve jack carrying mono audio together with composite video Lower level output is provided by a number of GPIO pins which support common protocols like I C The B models have an 8P8C Ethernet port and the Pi 3 Pi 4 and Pi Zero W have on board Wi Fi 802 11n and Bluetooth 53 Processor Edit The Raspberry Pi 2B uses a 32 bit 900 MHz quad core ARM Cortex A7 processor The Broadcom BCM2835 SoC used in the first generation Raspberry Pi 54 includes a 700 MHz 32 bit ARM1176JZF S processor VideoCore IV graphics processing unit GPU 55 and RAM It has a level 1 L1 cache of 16 KB and a level 2 L2 cache of 128 KB The level 2 cache is used primarily by the GPU The SoC is stacked underneath the RAM chip so only its edge is visible The ARM1176JZ F S is the same CPU used in the original iPhone 56 although at a higher clock rate and mated with a much faster GPU The earlier V1 1 model of the Raspberry Pi 2 used a Broadcom BCM2836 SoC with a 900 MHz 32 bit quad core ARM Cortex A7 processor with 256 KB shared L2 cache 57 The Raspberry Pi 2 V1 2 was upgraded to a Broadcom BCM2837 SoC with a 1 2 GHz 64 bit quad core ARM Cortex A53 processor 25 the same one which is used on the Raspberry Pi 3 but underclocked by default to the same 900 MHz CPU clock speed as the V1 1 The BCM2836 SoC is no longer in production as of late 2016 The Raspberry Pi 3 Model B uses a Broadcom BCM2837 SoC with a 1 2 GHz 64 bit quad core ARM Cortex A53 processor with 512 KB shared L2 cache The Model A and B are 1 4 GHz 58 59 60 The Raspberry Pi 4 uses a Broadcom BCM2711 SoC with a 1 5 GHz later models 1 8 GHz 64 bit quad core ARM Cortex A72 processor with 1 MB shared L2 cache 61 62 Unlike previous models which all used a custom interrupt controller poorly suited for virtualisation the interrupt controller on this SoC is compatible with the ARM Generic Interrupt Controller GIC architecture 2 0 providing hardware support for interrupt distribution when using ARM virtualisation capabilities 63 64 The Raspberry Pi Zero and Zero W use the same Broadcom BCM2835 SoC as the first generation Raspberry Pi although now running at 1 GHz CPU clock speed 65 The Raspberry Pi Zero W 2 uses the RP3A0 AU CPU a 1 GHz 64 bit ARM Cortex A53 on 512MB of SDRAM Documentation states this system on package is a Broadcom BCM2710A1 package using a BCM2837 Broadcom chip as core which is an ARM v8 quad core The Raspberry Pi 3 also uses the BCM2837 but clocked at 1 2 GHz The Raspberry Pi Pico uses the RP2040 running at 133 MHz Performance Edit While operating at 700 MHz by default the first generation Raspberry Pi provided a real world performance roughly equivalent to 0 041 GFLOPS 66 67 On the CPU level the performance is similar to a 300 MHz Pentium II of 1997 99 The GPU provides 1 Gpixel s or 1 5 Gtexel s of graphics processing or 24 GFLOPS of general purpose computing performance The graphical capabilities of the Raspberry Pi are roughly equivalent to the performance of the Xbox of 2001 Raspberry Pi 2 V1 1 included a quad core Cortex A7 CPU running at 900 MHz and 1 GB RAM It was described as 4 6 times more powerful than its predecessor The GPU was identical to the original 57 In parallelised benchmarks the Raspberry Pi 2 V1 1 could be up to 14 times faster than a Raspberry Pi 1 Model B 68 The Raspberry Pi 3 with a quad core Cortex A53 processor is described as having ten times the performance of a Raspberry Pi 1 69 Benchmarks showed the Raspberry Pi 3 to be approximately 80 faster than the Raspberry Pi 2 in parallelised tasks 70 The Raspberry Pi 4 with a quad core Cortex A72 processor is described as having three times the performance of a Raspberry Pi 3 1 Overclocking Edit Most Raspberry Pi systems on chip could be overclocked to 800 MHz and some to 1000 MHz There are reports the Raspberry Pi 2 can be similarly overclocked in extreme cases even to 1500 MHz discarding all safety features and over voltage limitations In Raspberry Pi OS the overclocking options on boot can be made by a software command running sudo raspi config without voiding the warranty 71 In those cases the Pi automatically shuts the overclocking down if the chip temperature reaches 85 C 185 F but it is possible to override automatic over voltage and overclocking settings voiding the warranty an appropriately sized heat sink is needed to protect the chip from serious overheating Newer versions of the firmware contain the option to choose between five overclock turbo presets that when used attempt to maximise the performance of the SoC without impairing the lifetime of the board This is done by monitoring the core temperature of the chip and the CPU load and dynamically adjusting clock speeds and the core voltage When the demand is low on the CPU or it is running too hot the performance is throttled but if the CPU has much to do and the chip s temperature is acceptable performance is temporarily increased with clock speeds of up to 1 GHz depending on the board version and on which of the turbo settings is used The overclocking modes are none 700 MHz ARM 250 MHz core 400 MHz SDRAM 0 overvoltingmodest 800 MHz ARM 250 MHz core 400 MHz SDRAM 0 overvoltingmedium 900 MHz ARM 250 MHz core 450 MHz SDRAM 2 overvoltinghigh 950 MHz ARM 250 MHz core 450 MHz SDRAM 6 overvoltingturbo 1000 MHz ARM 500 MHz core 600 MHz SDRAM 6 overvoltingPi 2 1000 MHz ARM 500 MHz core 500 MHz SDRAM 2 overvoltingPi 3 1100 MHz ARM 550 MHz core 500 MHz SDRAM 6 overvolting In system information the CPU speed appears as 1200 MHz When idling speed lowers to 600 MHz 71 72 In the highest turbo mode the SDRAM clock speed was originally 500 MHz but this was later changed to 600 MHz because of occasional SD card corruption Simultaneously in high mode the core clock speed was lowered from 450 to 250 MHz and in medium mode from 333 to 250 MHz The CPU of the first and second generation Raspberry Pi board did not require cooling with a heat sink or fan even when overclocked but the Raspberry Pi 3 may generate more heat when overclocked 73 RAM Edit The early designs of the Raspberry Pi Model A and B boards included only 256 MB of random access memory RAM Of this the early beta Model B boards allocated 128 MB to the GPU by default leaving only 128 MB for the CPU 74 On the early 256 MB releases of models A and B three different splits were possible The default split was 192 MB for the CPU which should be sufficient for standalone 1080p video decoding or for simple 3D processing 224 MB was for Linux processing only with only a 1080p framebuffer and was likely to fail for any video or 3D 128 MB was for heavy 3D processing possibly also with video decoding 75 In comparison the Nokia 701 uses 128 MB for the Broadcom VideoCore IV 76 The later Model B with 512 MB RAM was released on 15 October 2012 and was initially released with new standard memory split files arm256 start elf arm384 start elf arm496 start elf with 256 MB 384 MB and 496 MB CPU RAM and with 256 MB 128 MB and 16 MB video RAM respectively But about one week later the foundation released a new version of start elf that could read a new entry in config txt gpu mem xx and could dynamically assign an amount of RAM from 16 to 256 MB in 8 MB steps to the GPU obsoleting the older method of splitting memory and a single start elf worked the same for 256 MB and 512 MB Raspberry Pis 77 The Raspberry Pi 2 has 1 GB of RAM The Raspberry Pi 3 has 1 GB of RAM in the B and B models and 512 MB of RAM in the A model 78 79 80 The Raspberry Pi Zero and Zero W have 512 MB of RAM The Raspberry Pi 4 is available with 1 2 4 or 8 GB of RAM 81 A 1 GB model was originally available at launch in June 2019 but was discontinued in March 2020 48 and the 8 GB model was introduced in May 2020 2 The 1 GB model returned in October 2021 82 Networking Edit The Model A A and Pi Zero have no Ethernet circuitry and are commonly connected to a network using an external user supplied USB Ethernet or Wi Fi adapter On the Model B and B the Ethernet port is provided by a built in USB Ethernet adapter using the SMSC LAN9514 chip 83 The Raspberry Pi 3 and Pi Zero W wireless are equipped with 2 4 GHz WiFi 802 11n 150 Mbit s and Bluetooth 4 1 24 Mbit s based on the Broadcom BCM43438 FullMAC chip with no official support for monitor mode though it was implemented through unofficial firmware patching 84 and the Pi 3 also has a 10 100 Mbit s Ethernet port The Raspberry Pi 3B features dual band IEEE 802 11b g n ac WiFi Bluetooth 4 2 and Gigabit Ethernet limited to approximately 300 Mbit s by the USB 2 0 bus between it and the SoC The Raspberry Pi 4 has full gigabit Ethernet throughput is not limited as it is not funnelled via the USB chip Special purpose features Edit The RPi Zero RPi1A RPi3A 85 and RPi4 can be used as a USB device or USB gadget plugged into another computer via a USB port on another machine It can be configured in multiple ways such as functioning as a serial or Ethernet device 86 Although originally requiring software patches this was added into the mainline Raspbian distribution in May 2016 86 Raspberry Pi models with a newer chipset can boot from USB mass storage such as from a flash drive Booting from USB mass storage is not available in the original Raspberry Pi models the Raspberry Pi Zero the Raspberry Pi Pico the Raspberry Pi 2 A models and the Raspberry Pi 2 B models with versions lower than 1 2 87 Peripherals Edit The Model 2B boards incorporate four USB ports for connecting peripherals Although often pre configured to operate as a headless computer the Raspberry Pi may also optionally be operated with any generic USB computer keyboard and mouse 88 It may also be used with USB storage USB to MIDI converters and virtually any other device component with USB capabilities depending on the installed device drivers in the underlying operating system many of which are included by default Other peripherals can be attached through the various pins and connectors on the surface of the Raspberry Pi 89 Video Edit An early Raspberry Pi 1 Model A with an HDMI port and a standard RCA composite video port for older displays The video controller can generate standard modern TV resolutions such as HD and Full HD and higher or lower monitor resolutions as well as older NTSC or PAL standard CRT TV resolutions As shipped i e without custom overclocking it can support the following resolutions 640 350 EGA 640 480 VGA 800 600 SVGA 1024 768 XGA 1280 720 720p HDTV 1280 768 WXGA variant 1280 800 WXGA variant 1280 1024 SXGA 1366 768 WXGA variant 1400 1050 SXGA 1600 1200 UXGA 1680 1050 WXGA 1920 1080 1080p HDTV 1920 1200 WUXGA 90 Higher resolutions up to 2048 1152 may work 91 92 or even 3840 2160 at 15 Hz too low a frame rate for convincing video 93 Allowing the highest resolutions does not imply that the GPU can decode video formats at these resolutions in fact the Raspberry Pis are known to not work reliably for H 265 at those high resolutions 94 commonly used for very high resolutions however most common formats up to Full HD do work Although the Raspberry Pi 3 does not have H 265 decoding hardware the CPU is more powerful than its predecessors potentially fast enough to allow the decoding of H 265 encoded videos in software 95 The GPU in the Raspberry Pi 3 runs at higher clock frequencies of 300 MHz or 400 MHz compared to previous versions which ran at 250 MHz 96 The Raspberry Pis can also generate 576i and 480i composite video signals as used on old style CRT TV screens and less expensive monitors through standard connectors either RCA or 3 5 mm phono connector depending on model The television signal standards supported are PAL B G H I D PAL M PAL N NTSC and NTSC J 97 Real time clock Edit When booting the time defaults to being set over the network using the Network Time Protocol NTP The source of time information can be another computer on the local network that does have a real time clock or to a NTP server on the internet If no network connection is available the time may be set manually or configured to assume that no time passed during the shutdown In the latter case the time is monotonic files saved later in time always have later timestamps but may be considerably earlier than the actual time For systems that require a built in real time clock a number of small low cost add on boards with real time clocks are available 98 99 The RP2040 microcontroller has a built in real time clock but this can not be set automatically without some form of user entry or network facility being added Connectors EditPi Pico Edit Location of connectors and main ICs on Raspberry Pi PicoPi Compute Module Edit Location of connectors and main ICs on Raspberry Pi Compute Module 4 Lite Pi Zero Edit Location of connectors and main ICs on Raspberry Pi Zero 2 WModel A Edit Location of connectors and main ICs on Raspberry Pi 1 Model A Location of connectors and main ICs on Raspberry Pi 1 Model A revision 1 1 Model B Edit Location of connectors and main ICs on Raspberry Pi 1 Model B revision 1 2 Location of connectors and main ICs on Raspberry Pi 1 Model B revision 1 2 and Raspberry Pi 2 Location of connectors and main ICs on Raspberry Pi 3 Location of connectors and main ICs on Raspberry Pi 3 Location of connectors and main ICs on Raspberry Pi 4 J8 header and general purpose input output GPIO Edit Raspberry Pi 1 Models A and B Pi 2 Model B Pi 3 Models A B and B Pi 4 and Pi Zero Zero W Zero WH and Zero W 2 have the same 40 pin pinout called J8 header 100 101 Raspberry Pi 1 Models A and B have only the first 26 pins 102 103 104 The J8 header is commonly referred to as GPIO connector as a whole even though only a subset of the pins are GPIO pins In the Pi Zero and Zero W the 40 GPIO pins are unpopulated having the through holes exposed for soldering instead The Zero WH Wireless Header has the header pins preinstalled GPIO 2nd func Pin Pin 2nd func GPIO 3 3 V 1 2 5 V2 SDA1 I2C 3 4 5 V3 SCL1 I2C 5 6 GND4 GCLK 7 8 TXD0 UART 14GND 9 10 RXD0 UART 1517 GEN0 11 12 GEN1 1827 GEN2 13 14 GND22 GEN3 15 16 GEN4 23 3 3 V 17 18 GEN5 2410 MOSI SPI 19 20 GND9 MISO SPI 21 22 GEN6 2511 SCLK SPI 23 24 CE0 N SPI 8GND 25 26 CE1 N SPI 7 Pi 1 Models A and B stop here 0 ID SD I2C 27 28 ID SC I2C 15 N A 29 30 GND6 N A 31 32 N A 1213 N A 33 34 GND19 N A 35 36 N A 1626 N A 37 38 Digital IN 20GND 39 40 Digital OUT 21Model B rev 2 also has a pad called P5 on the board and P6 on the schematics of 8 pins offering access to an additional 4 GPIO connections 105 These GPIO pins were freed when the four board version identification links present in revision 1 0 were removed 106 GPIO 2nd func Pin Pin 2nd func GPIO 5 V 1 2 3 3 V28 GPIO GEN7 3 4 GPIO GEN8 2930 GPIO GEN9 5 6 GPIO GEN10 31GND 7 8 GNDModels A and B provide GPIO access to the ACT status LED using GPIO 16 Models A and B provide GPIO access to the ACT status LED using GPIO 47 and the power status LED using GPIO 35 Specifications EditVersion Pico Model A no Ethernet Model B with Ethernet Compute Module a Zero KeyboardRaspberry Pi Pico Raspberry Pi Pico W RPi 1 Model A RPi 1 Model A RPi 3 Model A RPi 1 Model B RPi 1 Model B RPi 2 Model B RPi 2 Model B v1 2 RPi 3 Model B RPi 3 Model B RPi 4 Model B Compute Module 1 Compute Module 3 Compute Module 3 Lite Compute Module 3 Compute Module 3 Lite Compute Module 4 Compute Module 4 Lite RPi Zero PCB v1 2 RPi Zero PCB v1 3 RPi Zero W RPi Zero 2 W RPi 400Release date Jan 2021 Jun 2022 Feb 2013 wbr 107 Nov 2014 wbr 108 Nov 2018 Apr Jun 2012 Jul 2014 wbr 109 Feb 2015 wbr 57 Oct 2016 wbr 110 Feb 2016 wbr 69 14 Mar 2018 wbr 27 24 June 2019 wbr 111 28 May 2020 8GB 2 Apr 2014 wbr 112 113 Jan 2017 wbr 114 Jan 2019 wbr 115 Oct 2020 Nov 2015 wbr 8 May 2016 28 Feb 2017 28 Oct 2021 wbr 39 2 Nov 2020Target price USD 4 6 25 107 20 108 25 35 116 25 117 35 35 55 75 wbr 111 48 2 30 in batches of 100 118 30 25 30 35 40 25 30 90 in 5 increments 25 75 in 5 increments 5 8 10 15 70Instruction set Armv6 M ARMv6Z 32 bit ARMv8 A 64 32 bit ARMv6Z 32 bit ARMv7 A 32 bit ARMv8 A 64 32 bit ARMv6Z 32 bit ARMv8 A 64 32 bit ARMv6Z 32 bit ARMv8 A 64 32 bit ARMv8 A 64 32 bit SoC Raspberry Pi RP2040 Broadcom BCM2835 54 Broadcom BCM2837B0 wbr 27 Broadcom BCM2835 54 Broadcom BCM2836 Broadcom BCM2837 Broadcom BCM2837B0 wbr 27 Broadcom BCM2711 wbr 111 Broadcom BCM2835 118 Broadcom BCM2837 Broadcom BCM2837B0 Broadcom BCM2711 Broadcom BCM2835 Broadcom BCM2710A1 Broadcom BCM2711C0FPU None VFPv2 NEON not supported VFPv4 NEON VFPv2 NEON not supported VFPv4 NEON VFPv2 NEON not supported VFPv4 NEON VFPv2 NEON not supported VFPv4 NEON VFPv4 NEONCPU Dual core Arm Cortex M0 1 ARM1176JZF S 700 MHz 4 Cortex A53 1 4 GHz 1 ARM1176JZF S 700 MHz 4 Cortex A7 900 MHz 4 Cortex A53 900 MHz 4 Cortex A53 1 2 GHz 4 Cortex A53 1 4 GHz 4 Cortex A72 1 5 GHz or 1 8 GHz 33 1 ARM1176JZF S 700 MHz 4 Cortex A53 1 2 GHz 4 Cortex A72 1 5 GHz 1 ARM1176JZF S 1 GHz 4 Cortex A53 1 GHz 4 Cortex A72 1 8 GHzGPU None Broadcom VideoCore IV 250 MHz b Broadcom VideoCore IV 400 MHz Core 300 MHz V3D Broadcom VideoCore VI 500 MHz 119 Broadcom VideoCore IV 250 MHz b Broadcom VideoCore VI 500 MHz 119 Broadcom VideoCore IV 400 MHz Core 300 MHz V3D Broadcom VideoCore VI 500 MHzMemory SDRAM 120 264 kB 256 MB c 256 or 512 MB c Changed to 512 MB on 10 August 2016 121 512 MB c 256 or 512 MB c Changed to 512 MB on 15 October 2012 45 512 MB c 1 GB c 1 2 4 or 8 GB c 512 MB c 1 GB c 1 2 4 or 8 GB c 512 MB c 4 GBUSB 2 0 ports 88 None 1 d 1 e 2 f 122 4 g 83 109 2 111 1 d a 1 d a 1 e a 1 1 Micro USB d 1USB 3 0 ports 0 2 111 0 2USB OTG ports 0 1 Power USB C wbr 123 0 1 Micro USB d 0PCIe interface 0 PCIe Gen 2 x1 0 0Video input 15 pin MIPI camera interface CSI connector used with the Raspberry Pi camera or Raspberry Pi NoIR camera 124 2 MIPI camera interface CSI a 118 125 126 2 lane MIPI CSI camera interface 4 lane MIPI CSI camera interface None MIPI camera interface CSI 127 NoneHDMI 1 HDMI rev 1 3 2 HDMI rev 2 0 via Micro HDMI 47 1 HDMI a 2x HDMI 1 Mini HDMI 2 HDMI rev 2 0 via Micro HDMIComposite video via RCA jack via 3 5 mm CTIA style TRRS jack via RCA jack via 3 5 mm CTIA style TRRS jack Yes a 125 128 via marked points on PCB for optional header pins 129 MIPI display interface DSI h Yes Yes a 118 126 130 131 Yes No Audio inputs As of revision 2 boards via I S 132 Audio outputs Analog via 3 5 mm phone jack digital via HDMI and as of revision 2 boards I S Analog HDMI I S a Mini HDMI stereo audio through PWM on GPIO Micro HDMIOn board storage 88 2 MB Flash memory SD MMC SDIO card slot 3 3 V with card power only MicroSDHC slot 109 SD MMC SDIO card slot MicroSDHC slot MicroSDHC slot USB Boot Mode 133 4 GB eMMC flash memory chip 118 MicroSDHC slot 8 16 32 GB eMMC flash memory chip 118 MicroSDHC slot 8 16 32 GB eMMC flash memory chip 118 MicroSDHC slot MicroSDHC slot MicroSDHC slotEthernet 8P8C 88 None None 134 None 10 100 Mbit sUSB adapter on the USB hub 122 10 100 Mbit s 10 100 1000 Mbit s real max speed 300 Mbit s 135 10 100 1000 Mbit s 111 None 10 100 1000 Mbit s None None 10 100 1000 Mbit sWiFi IEEE 802 11 wireless None b g n single band 2 4 GHz b g n ac dual band 2 4 5 GHz None b g n single band 2 4 GHz b g n ac dual band 2 4 5 GHz b g n ac dual band 2 4 5 GHz optional b g n single band 2 4 GHz b g n ac dual band 2 4 5 GHzBluetooth None 5 2 BLE 4 2 BLE 4 1 BLE 4 2 LS BLE 5 0 111 5 0 BLE optional 4 1 BLE 4 2 BLE 5 0Low level peripherals UART 8 GPIO 136 plus the following which can also be used as GPIO UART I C bus SPI bus with two chip selects I S audio 137 3 3 V 5 V ground 138 139 17 GPIO plus the same specific functions and HAT ID bus 8 GPIO plus the following which can also be used as GPIO UART I C bus SPI bus with two chip selects I S audio 3 3 V 5 V ground 17 GPIO plus the same specific functions and HAT ID bus 17 GPIO plus the same specific functions HAT and an additional 4 UART 4 SPI and 4 I2C connectors wbr 140 46 GPIO some of which can be used for specific functions including I C SPI UART PCM PWM a 141 28 GPIO supporting either 1 8v or 3 3v signalling and peripheral options 17 GPIO plus the same specific functions and HAT ID bus 8 Power ratings 300 mA 1 5 W 142 200 mA 1 W 143 700 mA 3 5 W 200 mA 1 W average when idle 350 mA 1 75 W maximum under stress monitor keyboard and mouse connected wbr 144 220 mA 1 1 W average when idle 820 mA 4 1 W maximum under stress monitor keyboard and mouse connected wbr 144 300 mA 1 5 W average when idle 1 34 A 6 7 W maximum under stress monitor keyboard mouse and WiFi connected wbr 144 459 mA 2 295 W average when idle 1 13 A 5 661 W maximum under stress monitor keyboard mouse and WiFi connected wbr 145 600 mA 3 W average when idle 1 25 A 6 25 W maximum under stress monitor keyboard mouse and Ethernet connected wbr 144 3 A 15 W power supply recommended wbr 1 200 mA 1 W 700 mA 3 5 W 100 mA 0 5 W average when idle 350 mA 1 75 W maximum under stress monitor keyboard and mouse connected wbr 144 120 mA 0 6 W average when idle 146 Power source MicroUSB or GPIO Header 1 8 V to 5 V 5 V via MicroUSB or GPIO header 5 V via MicroUSB GPIO header or PoE with the PoE HAT 5 V via USB C GPIO header or PoE with the PoE HAT 2 5 5 V 3 3 V 2 5 3 3 V and 1 8 V a 5 V 5 V via MicroUSB or GPIO header Size 51 x 21mm 85 6 mm 56 5 mm 3 37 in 2 22 in i 65 mm 56 5 mm 10 mm 2 56 in 2 22 in 0 39 in j 65 mm 56 5 mm 2 56 in 2 22 in 85 60 mm 56 5 mm 3 370 in 2 224 in i 85 60 mm 56 5 mm 17 mm 3 370 in 2 224 in 0 669 in 147 67 6 mm 30 mm 2 66 in 1 18 in 67 6 mm 31 mm 2 66 in 1 22 in 55 mm 40 mm 65 mm 30 mm 5 mm 2 56 in 1 18 in 0 20 in 286 mm 113 mm 23 mmWeight 31 g 1 1 oz 23 g 0 81 oz 45 g 1 6 oz 46 g 1 6 oz 148 7 g 0 25 oz 149 9 g 0 32 oz 150 10 8 g 0 38 oz Console Adding a USB network interface via tethering 134 or a serial cable with optional GPIO power connector 151 Generation 1 1 3 1 1 2 2 ver 1 2 3 3 4 1 3 3 Lite 3 3 Lite 4 4 Lite PCB ver 1 2 PCB ver 1 3 W wireless 2 W wireless 4ObsolescenceStatement in production until at least January 2028 in production until at least January 2026 in production until at least January 2026 in production until at least January 2026 see PCB ver 1 2 see ver 1 2 in production until at least January 2026 wbr 152 in production until at least January 2026 in production until at least January 2026 in production until at least January 2026 in production until at least January 2026 in production until at least January 2026 in production until at least January 2026 in production until at least January 2028 or see PCB ver 1 3 in production until at least January 2026 wbr 153 in production until at least January 2026 in production until at least January 2026 in production until at least January 2028 Type Pico Model A no Ethernet Model B with Ethernet Compute Module a Zero Keyboard a b c d e f g h i j k l 200 pin DDR2 SO DIMM interface till CM3 a b BCM2837 3D part of GPU at 300 MHz video part of GPU at 400 MHz 138 154 OpenGL ES 2 0 BCM2835 BCM2836 24 GFLOPS BCM2837 28 8 GFLOPS MPEG 2 and VC 1 with licence 155 1080p30 H 264 MPEG 4 AVC high profile decoder and encoder 54 BCM2837 1080p60 a b c d e f g h i j k Shared with GPU a b c d e Direct from the BCM2835 chip a b Direct from the BCM2837B0 chip via on board 3 port USB hub one USB port internally connected to the Ethernet port via on board 5 port USB hub one USB port internally connected to the Ethernet port for raw LCD panels a b Excluding protruding connectors Same as HAT board Simplified Model B changelog Edit Model Gen Variant Year SoC Clockspeed Cores Threads 64 bit GFLOPS RAM GB VideoOutput 4KReady USB AltBoot Ethernet Max Gbit s Wi Fi BT Power Source MSRP USD 1b1RPi 1 Model B 1B 256 MB 1b12012 BCM2835 0 7 GHz 1 1 0 213 002560 25 HDMI1 3Composite 2 USB2 0 0 1 Micro USB 351b2RPi 1 Model B 1B 512 MB 1 1 0 213 005120 51b3RPi 1 Model B 1B 1b32014 1 1 0 213 4 USB2 0 252b1RPi 2 Model B 2B 2b12015 BCM2836 0 9 GHz 4 4 1 47 010241 HDMI1 3 352b2RPi 2 Model B v1 2 2B v1 2 2b22016 BCM2837 4 433b1RPi 3 Model B 3B 1 2 GHz 3 62 USBNetwork through OTP bit setting b g nsingle band 2 4 GHz only 4 1 BLE3b2RPi 3 Model B 3B 3b22018 BCM2837B0 1 4 GHz 5 3 USBNetwork 0 35 b g n acdual band 4 2 LS BLE4b1RPi 4 Model B 4B 1 GB 4b12019 BCM2711 1 5 GHz 1 8 GHz 9 92 2 Micro HDMI2 0 2 USB2 02 USB3 0 1 0 5 0 USB C4b2RPi 4 Model B 4B 2 GB 020482 35from 454b3RPi 4 Model B 4B 4 GB 13 5 040964 554b4RPi 4 Model B 4B 8 GB 4b42020 081928 75Software EditOperating systems Edit Various operating systems for the Raspberry Pi can be installed on a MicroSD or SD card depending on the board and available adapters seen here is the MicroSD slot located on the bottom of a Raspberry Pi 2 board The Raspberry Pi Foundation provides Raspberry Pi OS formerly called Raspbian a Debian based Linux distribution for download as well as third party Ubuntu Windows 10 IoT Core RISC OS LibreELEC specialised media centre distribution 156 and specialised distributions for the Kodi media centre and classroom management 157 It promotes Python and Scratch as the main programming languages with support for many other languages 158 The default firmware is closed source while unofficial open source is available 159 160 161 Many other operating systems can also run on the Raspberry Pi The formally verified microkernel seL4 is also supported 162 There are several ways of installing multiple operating systems on one SD card 163 Other operating systems not Linux nor BSD based Broadcom VCOS Proprietary operating system which includes an abstraction layer designed to integrate with existing kernels such as ThreadX which is used on the VideoCore4 processor providing drivers and middleware for application development In the case of the Raspberry Pi this includes an application to start the ARM processor s and provide the publicly documented API over a mailbox interface serving as its firmware An incomplete source of a Linux port of VCOS is available as part of the reference graphics driver published by Broadcom 164 Haiku an open source BeOS clone that has been compiled for the Raspberry Pi and several other ARM boards 165 Work on Pi 1 began in 2011 but only the Pi 2 will be supported 166 HelenOS a portable microkernel based multiserver operating system has basic Raspberry Pi support since version 0 6 0 167 Plan 9 from Bell Labs 168 169 and Inferno 170 in beta QNX RISC OS Pi a special cut down version RISC OS Pico for 16 MB cards and larger for all models of Pi 1 amp 2 has also been made available Ultibo Core OS less unikerel Run Time Library based on Free Pascal Lazarus IDE Windows with 3rd party ports to Linux and MacOS Most Pi models supported 171 Windows 10 IoT Core a zero price edition of Windows 10 offered by Microsoft that runs natively on the Raspberry Pi 2 172 Other operating systems Linux based Alpine Linux a Linux distribution based on musl and BusyBox designed for power users who appreciate security simplicity and resource efficiency 173 Android Things an embedded version of the Android operating system designed for IoT device development Arch Linux ARM a port of Arch Linux for ARM processors and Arch based Manjaro Linux ARM arkOS designed for website and email self hosting CentOS for Raspberry Pi 2 and later Devuan emteria OS an embedded managed version of the Android operating system for professional fleet management Fedora supports Pi 2 and later since Fedora 25 Pi 1 is supported by some unofficial derivatives and RedSleeve a RHEL port for Raspberry Pi 1 Gentoo Linux 174 Kali Linux a Debian derived distro designed for digital forensics and penetration testing openSUSE 175 SUSE Linux Enterprise Server 12 SP2 176 and Server 12 SP3 Commercial support 176 OpenWrt a highly extensible Linux distribution for embedded devices typically wireless routers It supports Pi 1 2 3 4 and Zero W 177 postmarketOS distribution based on Alpine Linux primarily developed for smartphones RetroPie an offshoot of Raspbian OS that uses Emulation Station as its frontend for RetroArch and other emulators like Mupen64 for retro gaming 178 Hardware like Freeplay tech can help replace Game boy internals with RetroPie emulation 179 Sailfish OS with Raspberry Pi 2 due to use ARM Cortex A7 CPU Raspberry Pi 1 uses different ARMv6 architecture and Sailfish requires ARMv7 180 Slackware ARM version 13 37 and later runs on the Raspberry Pi without modification 181 182 183 184 The 128 496 MB of available memory on the Raspberry Pi is at least twice the minimum requirement of 64 MB needed to run Slackware Linux on an ARM or i386 system 185 Whereas the majority of Linux systems boot into a graphical user interface Slackware s default user environment is the textual shell command line interface 186 The Fluxbox window manager running under the X Window System requires an additional 48 MB of RAM 187 SolydXK a light Debian derived distro with Xfce Tiny Core Linux a minimal Linux operating system focused on providing a base system using BusyBox and FLTK Designed to run primarily in RAM Tizen A Linux based mobile operating system that was backed by the Linux Foundation and was mainly developed and primarily used by Samsung Ubuntu based Lubuntu 188 and Xubuntu 188 Void Linux a rolling release Linux distribution which was designed and implemented from scratch provides images based on musl or glibc webOS Open Source Edition An open source version of webOS Other operating systems BSD based FreeBSD 189 190 NetBSD 191 192 OpenBSD only on 64 bit platforms such as Raspberry Pi 3 193 Driver APIs EditSee also VideoCore Linux support Scheme of the implemented APIs OpenMAX IL OpenGL ES and OpenVG Raspberry Pi can use a VideoCore IV GPU via a binary blob which is loaded into the GPU at boot time from the SD card and additional software that initially was closed source 194 This part of the driver code was later released 195 However much of the actual driver work is done using the closed source GPU code Application software makes calls to closed source run time libraries OpenMAX IL OpenGL ES or OpenVG which in turn call an open source driver inside the Linux kernel which then calls the closed source VideoCore IV GPU driver code The API of the kernel driver is specific for these closed libraries Video applications use OpenMAX IL 3D applications use OpenGL ES and 2D applications use OpenVG which both in turn use EGL OpenMAX IL and EGL use the open source kernel driver in turn 196 Vulkan driver Edit The Raspberry Pi Foundation first announced it was working on a Vulkan driver in February 2020 197 A working Vulkan driver running Quake 3 at 100 frames per second on a 3B was revealed by a graphics engineer who had been working on it as a hobby project on 20 June 198 On 24 November 2020 Raspberry Pi Foundation announced that their driver for the Raspberry Pi 4 is Vulkan 1 0 conformant 199 Raspberry Pi Trading announced further driver conformance for Vulkan 1 1 and 1 2 on 26 October 2021 200 and 1 August 2022 201 Firmware Edit The official firmware is a freely redistributable 202 binary blob that is proprietary software 165 A minimal proof of concept open source firmware is also available mainly aimed at initialising and starting the ARM cores as well as performing minimal startup that is required on the ARM side It is also capable of booting a very minimal Linux kernel with patches to remove the dependency on the mailbox interface being responsive It is known to work on Raspberry Pi 1 2 and 3 as well as some variants of Raspberry Pi Zero 203 Third party application software Edit AstroPrint AstroPrint s wireless 3D printing software can be run on the Pi 2 204 C C Interpreter Ch Released 3 January 2017 C C interpreter Ch and Embedded Ch are released free for non commercial use for Raspberry Pi ChIDE is also included for the beginners to learn C C 205 Minecraft Released 11 February 2013 a modified version that allows players to directly alter the world with computer code 206 RealVNC Since 28 September 2016 Raspbian includes RealVNC s remote access server and viewer software 207 208 209 This includes a new capture technology which allows directly rendered content e g Minecraft camera preview and omxplayer as well as non X11 applications to be viewed and controlled remotely 210 211 UserGate Web Filter On 20 September 2013 Florida based security vendor Entensys announced porting UserGate Web Filter to Raspberry Pi platform 212 Steam Link On 13 December 2018 Valve released official Steam Link game streaming client for the Raspberry Pi 3 and 3 B 213 214 Software development tools Edit Arduino IDE for programming an Arduino Algoid for teaching programming to children and beginners BlueJ for teaching Java to beginners Greenfoot Greenfoot teaches object orientation with Java Create actors which live in worlds to build games simulations and other graphical programs Julia an interactive and cross platform programming language environment that runs on the Pi 1 and later 215 IDEs for Julia such as Visual Studio Code are available See also Pi specific GitHub repository JuliaBerry Lazarus 216 a Free Pascal RAD IDE LiveCode an educational RAD IDE descended from HyperCard using English like language to write event handlers for WYSIWYG widgets runnable on desktop mobile and Raspberry Pi platforms Ninja IDE a cross platform integrated development environment IDE for Python Processing an IDE built for the electronic arts new media art and visual design communities with the purpose of teaching the fundamentals of computer programming in a visual context Scratch a cross platform teaching IDE using visual blocks that stack like Lego originally developed by MIT s Life Long Kindergarten group The Pi version is very heavily optimised 217 for the limited computer resources available and is implemented in the Squeak Smalltalk system The latest version compatible with the 2B is 1 6 Squeak Smalltalk a full scale open Smalltalk TensorFlow an artificial intelligence framework developed by Google The Raspberry Pi Foundation worked with Google to simplify the installation process through pre built binaries 218 Thonny a Python IDE for beginners V Play Game Engine a cross platform development framework that supports mobile game and app development with the V Play Game Engine V Play apps and V Play plugins Xojo a cross platform RAD tool that can create desktop web and console apps for Pi 2 and Pi 3 C STEM Studio a platform for hands on integrated learning of computing science technology engineering and mathematics C STEM with robotics Erlang a functional language for building concurrent systems with light weight processes and message passing LabVIEW Community Edition a system design platform and development environment for a visual programming language from National Instruments Accessories Edit Raspberry Pi 5 megapixel camera Version 2 of the Pi Camera Raspberry Pi High Quality Camera Module Raspberry Pi 4 Model B with a TV Hat card for DVB T T2 television reception attached Gertboard A Raspberry Pi Foundation sanctioned device designed for educational purposes that expands the Raspberry Pi s GPIO pins to allow interface with and control of LEDs switches analogue signals sensors and other devices It also includes an optional Arduino compatible controller to interface with the Pi 219 Camera On 14 May 2013 the foundation and the distributors RS Components amp Premier Farnell Element 14 launched the Raspberry Pi camera board alongside a firmware update to accommodate it 220 The camera board is shipped with a flexible flat cable that plugs into the CSI connector which is located between the Ethernet and HDMI ports In Raspbian the user must enable the use of the camera board by running Raspi config and selecting the camera option The camera module costs 20 in Europe 9 September 2013 221 It uses the OmniVision OV5647 image sensor and can produce 1080p 720p and 640x480p video The dimensions are 25 mm 20 mm 9 mm 221 In May 2016 v2 of the camera was launched it is an 8 megapixel camera using a Sony IMX219 222 In January 2023 v3 of the camera was launched it is an 12 megapixel camera using a Sony IMX708 223 Infrared Camera In October 2013 the foundation announced that they would begin producing a camera module without an infrared filter called the Pi NoIR 224 Official Display On 8 September 2015 The foundation and the distributors RS Components amp Premier Farnell Element 14 launched the Raspberry Pi Touch Display 225 HAT Hardware Attached on Top expansion boards Together with the Model B inspired by the Arduino shield boards the interface for HAT boards was devised by the Raspberry Pi Foundation Each HAT board carries a small EEPROM typically a CAT24C32WI GT3 226 containing the relevant details of the board 227 so that the Raspberry Pi s OS is informed of the HAT and the technical details of it relevant to the OS using the HAT 228 Mechanical details of a HAT board which uses the four mounting holes in their rectangular formation are available online 229 230 High Quality Camera In May 2020 the 12 3 megapixel Sony IMX477 Exmor sensor camera module was released with support for C and CS mount lenses 231 The unit initially retailed for US 50 with interchangeable lenses starting at US 25 Vulnerability to flashes of light EditIn February 2015 a switched mode power supply chip designated U16 of the Raspberry Pi 2 Model B version 1 1 the initially released version was found to be vulnerable to flashes of light 232 particularly the light from xenon camera flashes and green 233 and red laser pointers The U16 chip has WL CSP packaging which exposes the bare silicon die The Raspberry Pi Foundation blog recommended covering U16 with opaque material such as Sugru or Blu Tak or putting the Raspberry Pi 2 in a case 234 233 This issue was not discovered before the release of the Raspberry Pi 2 because it is not standard or common practice to test susceptibility to optical interference 232 while commercial electronic devices are routinely subjected to tests of susceptibility to radio interference Reception and use Edit NASA s Open Source Rover powered by a Raspberry Pi 3 Technology writer Glyn Moody described the project in May 2011 as a potential BBC Micro 2 0 not by replacing PC compatible machines but by supplementing them 235 In March 2012 Stephen Pritchard echoed the BBC Micro successor sentiment in ITPRO 236 Alex Hope co author of the Next Gen report is hopeful that the computer will engage children with the excitement of programming 237 Co author Ian Livingstone suggested that the BBC could be involved in building support for the device possibly branding it as the BBC Nano 238 The Centre for Computing History strongly supports the Raspberry Pi project feeling that it could usher in a new era 239 Before release the board was showcased by ARM s CEO Warren East at an event in Cambridge outlining Google s ideas to improve UK science and technology education 240 Harry Fairhead however suggests that more emphasis should be put on improving the educational software available on existing hardware using tools such as Google App Inventor to return programming to schools rather than adding new hardware choices 241 Simon Rockman writing in a ZDNet blog was of the opinion that teens will have better things to do despite what happened in the 1980s 242 In October 2012 the Raspberry Pi won T3 s Innovation of the Year award 243 and futurist Mark Pesce cited a borrowed Raspberry Pi as the inspiration for his ambient device project MooresCloud 244 In October 2012 the British Computer Society reacted to the announcement of enhanced specifications by stating it s definitely something we ll want to sink our teeth into 245 In June 2017 Raspberry Pi won the Royal Academy of Engineering MacRobert Award 246 The citation for the award to the Raspberry Pi said it was for its inexpensive credit card sized microcomputers which are redefining how people engage with computing inspiring students to learn coding and computer science and providing innovative control solutions for industry 247 Clusters of hundreds of Raspberry Pis have been used for testing programs destined for supercomputers 248 Community Edit The Raspberry Pi community was described by Jamie Ayre of FOSS software company AdaCore as one of the most exciting parts of the project 249 Community blogger Russell Davis said that the community strength allows the Foundation to concentrate on documentation and teaching 249 The community developed a fanzine around the platform called The MagPi 250 which in 2015 was handed over to the Raspberry Pi Foundation by its volunteers to be continued in house 251 A series of community Raspberry Jam events have been held across the UK and around the world 252 Education Edit As of January 2012 update enquiries about the board in the United Kingdom have been received from schools in both the state and private sectors with around five times as much interest from the latter It is hoped that businesses will sponsor purchases for less advantaged schools 253 The CEO of Premier Farnell said that the government of a country in the Middle East has expressed interest in providing a board to every schoolgirl to enhance her employment prospects 254 255 In 2014 the Raspberry Pi Foundation hired a number of its community members including ex teachers and software developers to launch a set of free learning resources for its website 256 The Foundation also started a teacher training course called Picademy with the aim of helping teachers prepare for teaching the new computing curriculum using the Raspberry Pi in the classroom 257 In 2018 NASA launched the JPL Open Source Rover Project which is a scaled down version of Curiosity rover and uses a Raspberry Pi as the control module to encourage students and hobbyists to get involved in mechanical software electronics and robotics engineering 258 Home automation Edit There are a number of developers and applications that are using the Raspberry Pi for home automation These programmers are making an effort to modify the Raspberry Pi into a cost affordable solution in energy monitoring and power consumption Because of the relatively low cost of the Raspberry Pi this has become a popular and economical alternative to the more expensive commercial solutions citation needed Industrial automation Edit In June 2014 Polish industrial automation manufacturer TECHBASE released ModBerry an industrial computer based on the Raspberry Pi Compute Module The device has a number of interfaces most notably RS 485 232 serial ports digital and analogue inputs outputs CAN and economical 1 Wire buses all of which are widely used in the automation industry The design allows the use of the Compute Module in harsh industrial environments leading to the conclusion that the Raspberry Pi is no longer limited to home and science projects but can be widely used as an Industrial IoT solution and achieve goals of Industry 4 0 259 In March 2018 SUSE announced commercial support for SUSE Linux Enterprise on the Raspberry Pi 3 Model B to support a number of undisclosed customers implementing industrial monitoring with the Raspberry Pi 260 In January 2021 TECHBASE announced a Raspberry Pi Compute Module 4 cluster for AI accelerator routing and file server use The device contains one or more standard Raspberry Pi Compute Module 4s in an industrial DIN rail housing with some versions containing one or more Coral Edge tensor processing units 261 Commercial products Edit The Organelle is a portable synthesizer a sampler a sequencer and an effects processor designed and assembled by Critter amp Guitari It incorporates a Raspberry Pi computer module running Linux 262 OTTO is a digital camera created by Next Thing Co It incorporates a Raspberry Pi Compute Module It was successfully crowd funded in a May 2014 Kickstarter campaign 263 Slice is a digital media player which also uses a Compute Module as its heart It was crowd funded in an August 2014 Kickstarter campaign The software running on Slice is based on Kodi 264 Numerous commercial thin client computer terminals use the Raspberry Pi 265 AutoPi TMU device is a telematics unit which is built on top of a Raspberry Pi Compute Module 4 and incorporates the philosophy of which Raspberry Pi was built upon 266 COVID 19 pandemic Edit During the COVID 19 pandemic demand increased primarily due to the increase in remote work but also because of the use of many Raspberry Pi Zeros in ventilators for COVID 19 patients in countries such as Colombia 267 which were used to combat strain on the healthcare system In March 2020 Raspberry Pi sales reached 640 000 units the second largest month of sales in the company s history 268 Astro Pi and Proxima EditA project was launched in December 2014 at an event held by the UK Space Agency The Astro Pi was an augmented Raspberry Pi that included a sensor hat with a visible light or infrared camera The Astro Pi competition called Principia was officially opened in January and was opened to all primary and secondary school aged children who were residents of the United Kingdom During his mission British ESA astronaut Tim Peake deployed the computers on board the International Space Station 269 He loaded the winning code while in orbit collected the data generated and then sent this to Earth where it was distributed to the winning teams Covered themes during the competition included spacecraft sensors satellite imaging space measurements data fusion and space radiation The organisations involved in the Astro Pi competition include the UK Space Agency UKspace Raspberry Pi ESERO UK and ESA In 2017 the European Space Agency ran another competition open to all students in the European Union called Proxima The winning programs were run on the ISS by Thomas Pesquet a French astronaut 270 In December 2021 the Dragon 2 spacecraft launched by NASA had a pair of Astro Pi in it 271 History EditThis section is in list format but may read better as prose You can help by converting this section if appropriate Editing help is available February 2015 An early alpha test board in operation using different layout from later beta and production boards The computer is inspired by Acorn s BBC Micro of 1981 272 273 The Model A Model B and Model B names are references to the original models of the British educational BBC Micro computer developed by Acorn Computers 274 According to Upton the name Raspberry Pi was chosen with Raspberry as an ode to a tradition of naming early computer companies after fruit and Pi as a reference to the Python programming language 275 In 2006 early concepts of the Raspberry Pi were based on the Atmel ATmega644 microcontroller Its schematics and PCB layout are publicly available 276 Foundation trustee Eben Upton assembled a group of teachers academics and computer enthusiasts to devise a computer to inspire children 253 The first ARM prototype version of the computer was mounted in a package the same size as a USB memory stick 277 It had a USB port on one end and an HDMI port on the other The Foundation s goal was to offer two versions priced at US 25 and 35 They started accepting orders for the higher priced Model B on 29 February 2012 278 the lower cost Model A on 4 February 2013 279 and the even lower cost US 20 A on 10 November 2014 108 On 26 November 2015 the cheapest Raspberry Pi yet the Raspberry Pi Zero was launched at US 5 or 4 280 Pre launch Edit July 2011 2011 07 Trustee Eben Upton publicly approached the RISC OS Open community in July 2011 to enquire about assistance with a port 281 Adrian Lees at Broadcom has since worked on the port 282 283 with his work being cited in a discussion regarding the graphics drivers 284 This port is now included in NOOBS August 2011 50 alpha boards are manufactured These boards were functionally identical to the planned Model B 285 but they were physically larger to accommodate debug headers Demonstrations of the board showed it running the LXDE desktop on Debian Quake 3 at 1080p 286 and Full HD MPEG 4 video over HDMI 287 October 2011 A version of RISC OS 5 was demonstrated in public and following a year of development the port was released for general consumption in November 2012 288 289 290 291 December 2011 Twenty five Model B Beta boards were assembled and tested 292 from one hundred unpopulated PCBs 293 The component layout of the Beta boards was the same as on production boards A single error was discovered in the board design where some pins on the CPU were not held high it was fixed for the first production run 294 The Beta boards were demonstrated booting Linux playing a 1080p movie trailer and the Rightware Samurai OpenGL ES benchmark 295 Early 2012 During the first week of the year the first 10 boards were put up for auction on eBay 296 297 One was bought anonymously and donated to the museum at The Centre for Computing History in Cambridge England 239 298 The ten boards with a total retail price of 220 together raised over 16 000 299 with the last to be auctioned serial number No 01 raising 3 500 300 In advance of the anticipated launch at the end of February 2012 the Foundation s servers struggled to cope with the load placed by watchers repeatedly refreshing their browsers 301 Launch Edit 19 February 2012 The first proof of concept SD card image that could be loaded onto an SD card to produce a preliminary operating system is released The image was based on Debian 6 0 Squeeze with the LXDE desktop and the Midori browser plus various programming tools The image also runs on QEMU allowing the Raspberry Pi to be emulated on various other platforms 302 303 29 February 2012 Initial sales commence 29 February 2012 304 at 06 00 UTC At the same time it was announced that the model A originally to have had 128 MB of RAM was to be upgraded to 256 MB before release 278 The Foundation s website also announced Six years after the project s inception we re nearly at the end of our first run of development although it s just the beginning of the Raspberry Pi story 305 The web shops of the two licensed manufacturers selling Raspberry Pi s within the United Kingdom Premier Farnell and RS Components had their websites stalled by heavy web traffic immediately after the launch RS Components briefly going down completely 306 307 Unconfirmed reports suggested that there were over two million expressions of interest or pre orders 308 The official Raspberry Pi Twitter account reported that Premier Farnell sold out within a few minutes of the initial launch while RS Components took over 100 000 pre orders on day one 278 Manufacturers were reported in March 2012 to be taking a healthy number of pre orders 249 March 2012 Shipping delays for the first batch were announced in March 2012 as the result of installation of an incorrect Ethernet port 309 310 but the Foundation expected that manufacturing quantities of future batches could be increased with little difficulty if required 311 We have ensured we can get them the Ethernet connectors with magnetics in large numbers and Premier Farnell and RS Components the two distributors have been fantastic at helping to source components Upton said The first batch of 10 000 boards was manufactured in Taiwan and China 312 313 8 March 2012 Release Raspberry Pi Fedora Remix the recommended Linux distribution 314 developed at Seneca College in Canada 315 March 2012 The Debian port is initiated by Mike Thompson former CTO of Atomz The effort was largely carried out by Thompson and Peter Green a volunteer Debian developer with some support from the Foundation who tested the resulting binaries that the two produced during the early stages neither Thompson nor Green had physical access to the hardware as boards were not widely accessible at the time due to demand 316 While the preliminary proof of concept image distributed by the Foundation before launch was also Debian based it differed from Thompson and Green s Raspbian effort in a couple of ways The POC image was based on then stable Debian Squeeze while Raspbian aimed to track then upcoming Debian Wheezy packages 303 Aside from the updated packages that would come with the new release Wheezy was also set to introduce the armhf architecture 317 which became the raison d etre for the Raspbian effort The Squeeze based POC image was limited to the armel architecture which was at the time of Squeeze s release the latest attempt by the Debian project to have Debian run on the newest ARM embedded application binary interface EABI 318 The armhf architecture in Wheezy intended to make Debian run on the ARM VFP hardware floating point unit while armel was limited to emulating floating point operations in software 319 320 Since the Raspberry Pi included a VFP being able to make use of the hardware unit would result in performance gains and reduced power use for floating point operations 316 The armhf effort in mainline Debian however was orthogonal to the work surrounding the Pi and only intended to allow Debian to run on ARMv7 at a minimum which would mean the Pi an ARMv6 device would not benefit 317 As a result Thompson and Green set out to build the 19 000 Debian packages for the device using a custom build cluster 316 Post launch Edit 16 April 2012 Reports appear from the first buyers who had received their Raspberry Pi 321 322 20 April 2012 The schematics for the Model A and Model B are released 323 18 May 2012 The Foundation reported on its blog about a prototype camera module they had tested 324 The prototype used a 14 megapixel module 22 May 2012 Over 20 000 units had been shipped 325 July 2012 Release of Raspbian 326 16 July 2012 It was announced that 4 000 units were being manufactured per day allowing Raspberry Pis to be bought in bulk 327 328 24 August 2012 Hardware accelerated video H 264 encoding becomes available after it became known that the existing licence also covered encoding Formerly it was thought that encoding would be added with the release of the announced camera module 329 330 However no stable software exists for hardware H 264 encoding 331 At the same time the Foundation released two additional codecs that can be bought separately MPEG 2 and Microsoft s VC 1 Also it was announced that the Pi will implement CEC enabling it to be controlled with the television s remote control 155 5 September 2012 The Foundation announced a second revision of the Raspberry Pi Model B 332 A revision 2 0 board is announced with a number of minor corrections and improvements 333 6 September 2012 Announcement that in future the bulk of Raspberry Pi units would be manufactured in the UK at Sony s manufacturing facility in Pencoed Wales The Foundation estimated that the plant would produce 30 000 units per month and would create about 30 new jobs 334 335 15 October 2012 It is announced that new Raspberry Pi Model Bs are to be fitted with 512 MB instead of 256 MB RAM 336 24 October 2012 The Foundation announces that all of the VideoCore driver code which runs on the ARM had been released as free software under a BSD style licence making it the first ARM based multimedia SoC with fully functional vendor provided as opposed to partial reverse engineered fully open source drivers although this claim has not been universally accepted 195 On 28 February 2014 they also announced the release of full documentation for the VideoCore IV graphics core and a complete source release of the graphics stack under a 3 clause BSD licence 337 338 October 2012 It was reported that some customers of one of the two main distributors had been waiting more than six months for their orders This was reported to be due to difficulties in sourcing the CPU and conservative sales forecasting by this distributor 339 17 December 2012 The Foundation in collaboration with IndieCity and Velocix opens the Pi Store as a one stop shop for all your Raspberry Pi software needs Using an application included in Raspbian users can browse through several categories and download what they want Software can also be uploaded for moderation and release 340 3 June 2013 New Out of Box Software or NOOBS is introduced This makes the Raspberry Pi easier to use by simplifying the installation of an operating system Instead of using specific software to prepare an SD card a file is unzipped and the contents copied over to a FAT formatted 4 GB or bigger SD card That card can then be booted on the Raspberry Pi and a choice of six operating systems is presented for installation on the card The system also contains a recovery partition that allows for the quick restoration of the installed OS tools to modify the config txt and an online help button and web browser which directs to the Raspberry Pi Forums 341 October 2013 The Foundation announces that the one millionth Pi had been manufactured in the United Kingdom 342 November 2013 they announce that the two millionth Pi shipped between 24 and 31 October 343 28 February 2014 On the day of the second anniversary of the Raspberry Pi Broadcom together with the Raspberry Pi foundation announced the release of full documentation for the VideoCore IV graphics core clarification needed and a complete source release of the graphics stack under a 3 clause BSD licence 337 338 Raspberry Pi Compute Module Raspberry Pi Model B Compute Module 4 7 April 2014 The official Raspberry Pi blog announced the Raspberry Pi Compute Module a device in a 200 pin DDR2 SO DIMM configured memory module though not in any way compatible with such RAM intended for consumer electronics designers to use as the core of their own products 118 June 2014 The official Raspberry Pi blog mentioned that the three millionth Pi shipped in early May 2014 344 14 July 2014 The official Raspberry Pi blog announced the Raspberry Pi Model B the final evolution of the original Raspberry Pi For the same price as the original Raspberry Pi model B but incorporating numerous small improvements people have been asking for 109 10 November 2014 The official Raspberry Pi blog announced the Raspberry Pi Model A 108 It is the smallest and cheapest US 20 Raspberry Pi so far and has the same processor and RAM as the Model A Like the A it has no Ethernet port and only one USB port but does have the other innovations of the B like lower power micro SD card slot and 40 pin HAT compatible GPIO 2 February 2015 The official Raspberry Pi blog announced the Raspberry Pi 2 Looking like a Model B it has a 900 MHz quad core ARMv7 Cortex A7 CPU twice the memory for a total of 1 GB and complete compatibility with the original generation of Raspberry Pis 345 14 May 2015 The price of Model B was decreased from US 35 to 25 purportedly as a side effect of the production optimizations from the Pi 2 development 346 Industry observers have sceptically noted however that the price drop appeared to be a direct response to the CHIP a lower priced competitor discontinued in April 2017 347 29 September 2015 A new version of the Raspbian operating system based on Debian Jessie is released 348 26 November 2015 The Raspberry Pi Foundation launched the Raspberry Pi Zero the smallest and cheapest member of the Raspberry Pi family yet at 65 mm 30 mm and US 5 The Zero is similar to the Model A without camera and LCD connectors while smaller and uses less power It was given away with the Raspberry Pi magazine Magpi No 40 that was distributed in the UK and US that day the MagPi was sold out at almost every retailer internationally due to the freebie 8 29 February 2016 Raspberry Pi 3 with a BCM2837 1 2 GHz 64 bit quad processor based on the ARMv8 Cortex A53 with built in Wi Fi BCM43438 802 11n 2 4 GHz and Bluetooth 4 1 Low Energy BLE Starting with a 32 bit Raspbian version with a 64 bit version later to come if there is value in moving to 64 bit mode In the same announcement it was said that a new BCM2837 based Compute Module was expected to be introduced a few months later 69 February 2016 The Raspberry Pi Foundation announces that they had sold eight million devices for all models combined making it the best selling UK personal computer ahead of the Amstrad PCW 349 69 Sales reached ten million in September 2016 18 25 April 2016 Raspberry Pi Camera v2 1 announced with 8 Mpixels in normal and NoIR can receive IR versions The camera uses the Sony IMX219 chip with a resolution of 3280 2464 To make use of the new resolution the software has to be updated 350 10 October 2016 NEC Display Solutions announces that select models of commercial displays to be released in early 2017 will incorporate a Raspberry Pi 3 Compute Module 351 14 October 2016 Raspberry Pi Foundation announces their co operation with NEC Display Solutions They expect that the Raspberry Pi 3 Compute Module will be available to the general public by the end of 2016 352 25 November 2016 11 million units sold 353 16 January 2017 Compute Module 3 and Compute Module 3 Lite are launched 114 28 February 2017 Raspberry Pi Zero W with WiFi and Bluetooth via chip scale antennas launched 354 355 17 August 2017 The Raspbian operating system is upgraded to a new version based on Debian Stretch 356 14 March 2018 On Pi Day Raspberry Pi Foundation introduced Raspberry Pi 3 Model B with improvements in the Raspberry PI 3B computers performance updated version of the Broadcom application processor better wireless Wi Fi and Bluetooth performance and addition of the 5 GHz band 357 15 November 2018 Raspberry Pi 3 Model A launched 358 28 January 2019 Compute Module 3 CM3 Lite CM3 8 GB CM3 16 GB and CM3 32 GB launched 115 24 June 2019 Raspberry Pi 4 Model B launched 1 along with a new version of the Raspbian operating system based on Debian Buster 359 10 December 2019 30 million units sold 360 sales are about 6 million per year 361 362 28 May 2020 An 8GB version of the Raspberry Pi 4 is announced for 75 363 Raspberry Pi OS is split off from Raspbian and now includes a beta of a 64 bit version that allows programs to use more than 4GB of RAM 364 19 October 2020 Compute Module 4 launched 365 2 November 2020 Raspberry Pi 400 launched It is a keyboard which incorporates Raspberry Pi 4 into it GPIO pins of the Raspberry Pi 4 are accessible 366 21 January 2021 Raspberry Pi Pico launched It is the first microcontroller class product from Raspberry Pi It is based on RP2040 Microcontroller developed by Raspberry Pi 42 11 May 2021 40 million units sold 367 21 September 2021 42 million units sold 368 30 October 2021 Raspberry Pi OS formerly Raspbian is updated version 11 based on Debian Bullseye 369 With this release the default clock speed for revision 1 4 of the Raspberry Pi 4 is increased to 1 8 GHz 33 16 November 2021 43 million units sold 370 28 February 2022 exactly 10 years after the first shipment 46 million units sold 371 Raspberry Pi Cumulative Shipment Units mil Sales EditAccording to the Raspberry Pi Foundation more than 5 million Raspberry Pis were sold by February 2015 making it the best selling British computer 24 By November 2016 they had sold 11 million units 353 372 and 12 5 million by March 2017 making it the third best selling general purpose computer 373 In July 2017 sales reached nearly 15 million 374 climbing to 19 million in March 2018 27 By December 2019 a total of 30 million devices had been sold 375 non primary source needed Supply difficulties EditIn 2021 and continuing through 2022 there are significant availability issues and Raspberry Pi products are difficult to obtain 376 The company explained its approach to the shortages in 2021 377 and April 2022 378 explaining that it was prioritising business and industrial customers however major distributors are showing lead times in excess of 12 months on all products The situation is sufficiently long term that at least one automated stock checker is online 379 See also Edit Electronics portalSingle board computer Plug computerReferences Edit a b c d e Upton Eben 24 June 2019 Raspberry Pi 4 on sale now from 35 Raspberry Pi Foundation a b c d e Upton Eben 28 May 2020 8GB Raspberry Pi 4 on sale now at 75 Raspberry Pi Blog Retrieved 28 May 2020 Upton Eben 2 November 2020 Raspberry Pi 400 the 70 desktop PC Raspberry Pi Foundation Upton Liz 30 April 2015 Windows 10 for IoT Raspberry Pi Foundation a b c d e f g Hattersley Lucy Raspberry Pi 4 3A Zero W specs benchmarks amp thermal tests The MagPi magazine Raspberry Pi Trading Ltd Retrieved 28 May 2020 a b c DATASHEET Raspberry Pi Compute Module 3 PDF Raspberrypi org 1 January 2019 Retrieved 28 May 2020 Raspberry Pi 4 Tech Specs Raspberry Pi Retrieved 26 June 2019 a b c d e Raspberry Pi Zero the 5 Computer Raspberry Pi Foundation 26 November 2015 Retrieved 26 November 2015 Pi Bootmodes Only Supports Pi 2 v1 2 and up a b BCM2835 Raspberry Pi Documentation raspberrypi org BCM2711 Raspberry Pi Documentation raspberrypi org BCM2835 Raspberry Pi Documentation raspberrypi org Datasheet Raspberry Pi 4 Model B PDF Raspberrypi org June 2019 Retrieved 2 March 2022 Raspberry Pi Foundation About Us Raspberrypi org Retrieved 23 August 2020 Cellan Jones Rory 5 May 2011 A 15 computer to inspire young programmers BBC News Price Peter 3 June 2011 Can a 15 computer solve the programming gap BBC Click Retrieved 2 July 2011 Bush Steve 25 May 2011 Dongle computer lets kids discover programming on a TV Electronics Weekly Retrieved 11 July 2011 a b Ten millionth Raspberry Pi and a new kit Raspberry Pi 8 September 2016 Retrieved 9 September 2016 we ve beaten our wildest dreams by three orders of magnitude Upton Liz 25 April 2013 The Raspberry Pi in scientific research Raspberry Pi Retrieved 3 April 2020 Eben Upton CBE Archives of IT Retrieved 17 November 2020 About Us sonypencoed co uk Retrieved 27 September 2017 Tung Liam 27 July 2017 Raspberry Pi 14 million sold 10 million made in the UK ZDNet ZDNet chrisfleck 11 May 2021 Great call with EbenUpton today Congrats on 40 Million RaspberryPi sold A lot more headed to The enterprise wit Tweet via Twitter a b Gibbs Samuel 18 February 2015 Raspberry Pi becomes best selling British computer The Guardian Retrieved 28 December 2016 a b Raspberry Pi 2 Model B V1 2 Technical Specifications PDF RS Components Archived from the original PDF on 20 September 2017 Retrieved 20 September 2017 Eben Upton talks Raspberry Pi 3 The MagPi Magazine 29 February 2016 a b c d e Upton Eben 14 March 2018 Raspberry Pi 3 Model B on Sale at 35 Raspberry Pi Blog Raspberry Pi Foundation Retrieved 4 May 2018 Confirmed Raspberry Pi 4 suffers from significant USB C design flaw Android Authority 10 July 2019 The Raspberry Pi 4 doesn t work with all USB C cables Social techcrunch com 9 July 2019 Retrieved 2 March 2022 Tested 10 Raspberry Pi 4 USB C Cables That Work Tom s Hardware 13 July 2019 Retrieved 21 July 2019 you ll still need an AC adapter that delivers 5 volts and at least 3 amps of power so unless you already have one your best bet might be to buy the official Raspberry Pi 4 power supply which comes with a built in cable and goes for 8 to 10 Speed Richard 21 February 2020 Get in the C Raspberry Pi 4 can handle a wider range of USB adapters thanks to 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