Each distinct Raspberry Pi model revision has a unique revision code. You can look up a Raspberry Pi's revision code by running:
cat /proc/cpuinfoThe last three lines show the hardware type, the revision code, and the Pi's unique serial number. For example:
Hardware : BCM2835
Revision : a02082
Serial : 00000000765fc593
Note: As of the 4.9 kernel, all Pis report BCM2835, even those with BCM2836 and BCM2837 processors. You should not use this string to detect the processor.
The first set of Raspberry Pi revisions were given sequential hex revision codes from 0002 to 0015:
| Code | Model | Revision | RAM | Manufacturer |
|---|---|---|---|---|
| 0002 | B | 1.0 | 256 MB | Egoman |
| 0003 | B | 1.0 | 256 MB | Egoman |
| 0004 | B | 2.0 | 256 MB | Sony UK |
| 0005 | B | 2.0 | 256 MB | Qisda |
| 0006 | B | 2.0 | 256 MB | Egoman |
| 0007 | A | 2.0 | 256 MB | Egoman |
| 0008 | A | 2.0 | 256 MB | Sony UK |
| 0009 | A | 2.0 | 256 MB | Qisda |
| 000d | B | 2.0 | 512 MB | Egoman |
| 000e | B | 2.0 | 512 MB | Sony UK |
| 000f | B | 2.0 | 512 MB | Egoman |
| 0010 | B+ | 1.0 | 512 MB | Sony UK |
| 0011 | CM1 | 1.0 | 512 MB | Sony UK |
| 0012 | A+ | 1.1 | 256 MB | Sony UK |
| 0013 | B+ | 1.2 | 512 MB | Embest |
| 0014 | CM1 | 1.0 | 512 MB | Embest |
| 0015 | A+ | 1.1 | 256 MB / 512 MB | Embest |
With the launch of the Raspberry Pi 2, new-style revision codes were introduced. Rather than being sequential, each bit of the hex code represents a piece of information about the revision:
uuuuuuuuFMMMCCCCPPPPTTTTTTTTRRRR
| Part | Represents | Options |
|---|---|---|
| uuuuuuuu | Unused | Unused |
| F | New flag | 1: new-style revision |
| 0: old-style revision | ||
| MMM | Memory size | 0: 256 MB |
| 1: 512 MB | ||
| 2: 1 GB | ||
| CCCC | Manufacturer | 0: Sony UK |
| 1: Egoman | ||
| 2: Embest | ||
| 3: Sony Japan | ||
| PPPP | Processor | 0: BCM2835 |
| 1: BCM2836 | ||
| 2: BCM2837 | ||
| TTTTTTTT | Type | 0: A |
| 1: B | ||
| 2: A+ | ||
| 3: B+ | ||
| 4: 2B | ||
| 5: Alpha (early prototype) | ||
| 6: CM1 | ||
| 8: 3B | ||
| 9: Zero | ||
| a: CM3 | ||
| c: Zero W | ||
| RRRR | Revision | 0, 1, 2, etc. |
New-style revision codes in use:
| Code | Model | Revision | RAM | Manufacturer |
|---|---|---|---|---|
| 900021 | A+ | 1.1 | 512 MB | Sony UK |
| 900032 | B+ | 1.2 | 512 MB | Sony UK |
| 900092 | Zero | 1.2 | 512 MB | Sony UK |
| 900093 | Zero | 1.3 | 512 MB | Sony UK |
| 9000c1 | Zero W | 1.1 | 512 MB | Sony UK |
| 920093 | Zero | 1.3 | 512 MB | Embest |
| a01040 | 2B | 1.0 | 1 GB | Sony UK |
| a01041 | 2B | 1.1 | 1 GB | Sony UK |
| a02082 | 3B | 1.2 | 1 GB | Sony UK |
| a020a0 | CM3 | 1.0 | 1 GB | Sony UK |
| a21041 | 2B | 1.1 | 1 GB | Embest |
| a22042 | 2B (with BCM2837) | 1.2 | 1 GB | Embest |
| a22082 | 3B | 1.2 | 1 GB | Embest |
| a32082 | 3B | 1.2 | 1 GB | Sony Japan |