RASPBERRY PI GPIO DIAGRAM

HERE YOU CAN FIND A FULLY ANNOTATED DIAGRAM OF THE GPIO PINS ON YOUR RASPBERRY PI. EACH PIN IS LABELED WITH ITS PHYSICAL NUMBER AND BCM NUMBER.

The physical numbers simply correspond to the pin’s actual physical location, starting at 1 and going all the way down to 40. The BCM number on each pin (for example, BCM 25) is known as the Broadcom pin number, or the GPIO number. These numbers are used internally by your Pi’s processor, and you usually need to use them inside GPIO Zero and other programming libraries.

Some pins have alternate functions specified in brackets; if you want to learn more about these, see the official documentation on the Raspberry Pi website (https://www.raspberrypi.org/documentation/usage/gpio/).

FIGURE B-1 The Raspberry Pi GPIO pins