Difference: WoodenBox (2 vs. 3)

GPIO Shutdown

To keep prices down, the Raspberry Pi is missing something that most electronic devices come with: a switch to turn it on and off. That’s OK, you say, we’ll just pull the plug to turn it off. Unfortunately, this can lead to corruption problems with the SD card. All the instructions say you should run the shutdown command before pulling the plug, but this is not always possible, particularly when your Raspberry Pi is running headless without a connected keyboard and monitor, and possibly even without a network connection. So, what can a self-respecting DIYer do? The answer, of course, is ‘add your own switch’!

To switch off the Raspberry Pi from the console: sudo poweroff

shutdown -h now sudo halt

shutdown -r now sudo reboot

https://github.com/raspberrypi/firmware/tree/master/boot/overlays

• gpio-poweroff

dtoverlay=gpio-shutdown,gpio_pin=21

Run

If the Raspberry Pi is in HALT mode then you can start it again with switch off (pull the plug) and switch on again or hit the RUN button.

P6 Pinout