GPIO Pinout

The OLED bonnet (with buttons) and DS1338 RTC module are connected to the Pi via GPIO pins.

BCM Pin #	Function	Physical Pin #	Used By
	3v3 Power	1	OLED Bonnet & RTC
BCM 2	SDA	3	OLED Bonnet & RTC
BCM 3	SCL	5	OLED Bonnet & RTC
	Ground	6	OLED Bonnet & RTC
BCM 4	Joystick Center	7	OLED Bonnet
BCM 17	Joystick Up	11	OLED Bonnet
BCM 27	Joystick Left	13	OLED Bonnet
BCM 22	Joystick Down	15	OLED Bonnet
BCM 23	Joystick Right	16	OLED Bonnet
BCM 5	Button A	29	OLED Bonnet
BCM 6	Button B	31	OLED Bonnet