Wiring Button Pin RPi GPIO 1 GPIO 3 (SCL) 2 GND Power On On my Raspberry Pi 2 Model B Rev 1.1, the system will power on from a halted state when shorting the SCL (GPIO 3) to Ground.
Shutdown When the system is on, the below script will monitor SCL (GPIO 3) for a button press. When a button press is detected, the script will shutdown the Raspberry Pi safely.
