Appendix B. Raspberry Pi Pinouts
Raspberry Pi 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 have a Raspberry Pi, it is most likely to be a model B revision 2 board, as shown in Figure B-2.
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
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