Appendix B. Raspberry Pi Pinouts
Raspberry Pi 400/4/3/2 Model B, B+, A+, Zero
Figure B-1 shows the pinout for the current 40-pin general-purpose input/output (GPIO) Raspberry Pi.
Figure B-1. 40-pin Raspberry Pi GPIO pinout
Raspberry Pi Model B revision 2, A
If you bought one of the early 26-pin Raspberry Pis, then it is most likely to be a model B revision 2 board, as shown in Figure B-2. (If you have one of these first editions of the Raspberry Pi, hang on to it; it might be valuable one day.)
Figure B-2. Raspberry Pi model B revision 2 and model A GPIO pinout
Raspberry Pi Model B revision 1
The very first released version of the Raspberry Pi model B (revision 1) has some minor pinout differences to the revision 2 that followed. This is the only version of the Raspberry Pi that is not compatible with later pinouts. The incompatible pins that changed are highlighted in bold in Figure B-3.
Figure B-3. Raspberry Pi model B revision 1 GPIO pinout
Raspberry Pi Pico
Although the Raspberry Pi Pico also has a 40-pin connector, the connections are entirely different, as shown in Figure B-4.
Figure B-4. Raspberry Pi Pico GPIO pinout
Get Raspberry Pi Cookbook, 4th Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
