Initial commit

README.md

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+# PWR-Switch
+
+A little wrapper around [my PWR-Switch config](https://voidcruiser.nl/rambles/pwr-switch/).

pwr-switch

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+#!/bin/sh
+
+# $Id: pwr-switch 122491 2022-06-02 13:30:06Z sluijtma $
+# $URL: https://svn.uvt.nl/its-unix/systems/hastur/usr/local/sbin/pwr-switch $
+
+INIT_PIN(){
+	# the PWR-SWITCH is connected to GPIO 15 and the presceding ground pin
+	# reference page https://pinout.xyz/pinout/
+	[ -d /sys/class/gpio/gpio15 ] && echo "Pin already initialised" && exit 0
+	echo 15 > /sys/class/gpio/export
+	echo out > /sys/class/gpio/gpio15/direction
+}
+
+DEINIT_PIN(){
+	[ -d /sys/class/gpio/gpio15 ] || echo "Pin not initialised" && exit 0
+	echo 15 > /sys/class/gpio/unexport
+}
+
+PIN_STATUS(){
+	if [ -d /sys/class/gpio/gpio15 ] ; then
+		echo "pin status: Pin initialised"
+	else
+		echo "pin status: Pin not initialised"
+	fi
+}
+
+SWITCH_ON(){
+	# initialise pin before doing anything
+	[ -d /sys/class/gpio/gpio15 ] || INIT_PIN
+	echo 1 > /sys/class/gpio/gpio15/value
+}
+
+SWITCH_OFF(){
+	# initialise pin before doing anything
+	[ -d /sys/class/gpio/gpio15 ] || INIT_PIN
+	echo 0 > /sys/class/gpio/gpio15/value
+}
+
+TOGGLE_SWITCH(){
+	# initialise pin before doing anything
+	[ -d /sys/class/gpio/gpio15 ] || INIT_PIN
+	case $(cat /sys/class/gpio/gpio15/value) in
+		1) SWITCH_OFF;;
+		0) SWITCH_ON;;
+	esac
+}
+
+USAGE(){
+	cat >&2 <<EOF
+Usage: pwr-switch <on|off|init|deinit|help>
+	on: send on signal
+	off: send off signal
+	init: initialise pin
+	deinit: deinitialise pin
+	status: show pin initialisation state
+	toggle: toggle on/off signal
+EOF
+}
+
+case $1 in
+	on) SWITCH_ON;;
+	off) SWITCH_OFF;;
+	init) INIT_PIN;;
+	deinit) DEINIT_PIN;;
+	status) PIN_STATUS;;
+	toggle) TOGGLE_SWITCH;;
+	*) USAGE;;
+esac