# Element14 Pi-Desktop scripts for LibreELEC This gist contains the files needed to make Pi-Desktop's power butoon work in LibreELEC. Due to hardware limitations in the Pi-Desktop this button turns off the Raspberry Pi instead of opening the power menu. ## Setup 1. Install the Raspberry Pi Tools add-on - `System (settings)` -> `Add-ons` -> `Install from repozitory` -> `LibreELEC Add-ons` -> `Program add-ons` -> `Raspberry Pi Tools` -> `Install` 2. Get SSH access - `System (settings)` -> `LibreELEC` -> `Services` -> `Enable SSH` - If you don't setup a password the default is `libreelec` - Keep in mind that the default password should be changed or SSH turned off for better security. - `System (settings)` -> `LibreELEC` -> `Connections` -> `Address: aaa.bbb.c.ddd` - Get the IP address of the device by looking at the connection used 3. SSH to the device: `ssh root@aaa.bbb.c.ddd` 4. Run the install script: `curl -sSL https://opengist.stefka.eu/jiriks74/element14-libreelec/raw/HEAD/install.sh | bash` 5. The light should blink once to indicate that the power button script started successfully - It will blink once/twice on every boot to indicate that the Pi comunicates with the power supply > If the service is already running (you ran the script more than once) the ligt will not blink. > Reboot the device and watch for a blink during the boot process or restart the service using `systemctl restart pidesktop-powerkey`. ## Manual setup If you're uncomfortable running scripts from the internet you can fetch the files yourself and save them like this: ```bash /storage/scripts/pidesktop/powerkey.py /storage/.config/system.d/pidesktop-powerkey.service ``` Then you need to run 1. `systemctl daemon-reload` to load the service file 2. `systemctl enable pidesktop-powerkey` to start the service on boot 3. `systemctl start pidekstop-powerkey` to start the service now The light on the case should blink once to indicate that the script initialized successfully. > If the service is already running (you started a running pidesktop-powerkey service) the ligt will not blink. > Reboot the device and watch for a blink during the boot process or restart the service using `systemctl restart pidesktop-powerkey`. ## Usage of the Pi-Desktop button The power key can do 2 things on the Pi Desktop - When held for 2 seconds it sends a power off signal to the Pi (only once, more keypresses don't do anything) - When held for 5 seconds it cuts off power from the Pi (as if you unplugged if from wall power)

#!/bin/bash set -e echo "Creating directories..." mkdir -p /storage/scripts/pidesktop echo "Downloading files..." curl -s "https://opengist.stefka.eu/jiriks74/element14-libreelec/raw/HEAD/powerkey.py" -o /storage/scripts/pidesktop/powerkey.py curl -s "https://opengist.stefka.eu/jiriks74/element14-libreelec/raw/HEAD/pidesktop-powerkey.service" -o /storage/.config/system.d/pidesktop-powerkey.service echo "Files downloaded successfully." echo "Loading the systemd service..." systemctl daemon-reload systemctl enable pidesktop-powerkey echo "Service loaded. Starting the service..." echo "Watch the case now. The light should blink once/twice to indicate that the the script is working." sleep 5 systemctl start pidesktop-powerkey echo "" echo "Setup finished." echo "The power button should work now." echo "" echo "Disclaimer: Reboot might not be possible anymore. The Pi-Desktop cuts power after 30 seconds of no response from the Pi." echo " If the Pi takes more than 30 seconds to reboot the Pi-Desktop will cut it's power and you'll have to turn it on again."

[Unit] Description=pidesktop power button service After=local-fs.target [Service] Type=simple User=root ExecStart=/usr/bin/python /storage/scripts/pidesktop/powerkey.py [Install] WantedBy=multi-user.target

#!/usr/bin/env python # # pd-powerkey.py - monitor GPIO to detect power key press from Power MCU (PCU) # import time,os,sys os.chdir('/storage/scripts/pidesktop/') sys.path.append('/storage/.kodi/addons/virtual.rpi-tools/lib') # Import gpiozero from Raspberry Pi Tools add-on from gpiozero import Button,LED print("pidesktop: power button service initializing") pwrBtn = Button(13) # PCU to Pi - detect power key pressed pcu = LED(6) # Pi to PCU - start/stop shutdown timer pcu.off() # tell PCU we are alive pcu.on() # cause blink by starting shutdown timer time.sleep(0.5) pcu.off() # clear timer to stop blinking and prefent forced power off # callback function def powerkey_pressed(channels): print("pidesktop: power button press detected, initiating shutdown") os.system("sync") # os.system("shutdown -h now") # Shutdown the OS directly (forced shutdown) os.system("kodi-send --action=ShutDown") # Tell Kodi to execute it's shutdown procedure (graceful) sys.exit() pwrBtn.when_released = powerkey_pressed # Setup callback for the power off signal print("pidesktop: power button monitor enabled") while True: # Keep the service running time.sleep(10)