Initial commit

raspberry-pi/gpio-shutdown.py

@@ -0,0 +1,16 @@
+#!/usr/bin/python
+#
+# Watch board pin number 5 for level changes and initiate a power-off
+# when this pin goes low.
+#
+from RPi import GPIO
+from subprocess import call
+
+# https://pinout.xyz/pinout/i2c
+pin = 5  # a.k.a BCM 3 a.k.a SCL
+
+GPIO.setmode(GPIO.BOARD)
+GPIO.setup(pin, GPIO.IN)
+GPIO.wait_for_edge(pin, GPIO.FALLING)
+print('Board pin number 5 dropped to low, initiating poweroff')
+call(["/bin/systemctl","poweroff","--force"])