What would be the proper way to add a power button for BalenaOS

Product support balenaOS
23

I was able to get back onto this. I’m committed to finding a solution and sharing it for others.
So I was able to make some stuff happen and get some error logs, I went through them all (things like exporting dbus, etc) but now I have no log at all when I press the button. So no errors but also no shutdown just this:

<Interface <ProxyObject wrapping <dbus._dbus.SystemBus (system) at 0x769f41b0> :1.1 /org/freedesktop/login1 at 0x769ef690> implementing 'org.freedesktop.login1.Manager.PowerOff' at 0x769ef830>

dockercompose

  button:
    build: ./button
    restart: always
    network_mode: host
    privileged: true
    labels:
      io.balena.features.dbus: '1'
      io.balena.features.firmware: '1'
    environment:
      - DBUS_SYSTEM_BUS_ADDRESS=unix:path=/host/run/dbus/system_bus_socket

dockerfile:

#!/usr/bin/env bash

## connect to the host's system bus from the application container
export DBUS_SYSTEM_BUS_ADDRESS=unix:path=/host/run/dbus/system_bus_socket

python button.py

button.py

import RPi.GPIO as GPIO
import time
import dbus

# Set GPIO mode: GPIO.BCM or GPIO.BOARD
GPIO.setmode(GPIO.BOARD)

# Set pin 5 an an input, and enable the internal pull-up resistor
GPIO.setup(5, GPIO.IN, pull_up_down=GPIO.PUD_UP)

oldButtonState1 = True

while True:
    buttonState1 = GPIO.input(5)

    if buttonState1 != oldButtonState1 and buttonState1 == False :
        bus = dbus.SystemBus()
        boolean = dbus.Boolean(True)
        remote_object = bus.get_object('org.freedesktop.login1', '/org/freedesktop/login1')
        interface = dbus.Interface(remote_object, 'org.freedesktop.login1.Manager.PowerOff')

        print interface

    oldButtonState1 = buttonState1

time.sleep(1)

Once this is solved it will wake using the same button. I can power the device down from the dashboard/balena cloud and wake it back up whenever by just pressing the button. So when this get’s solved, it’ll be a pretty cool, handy feature.