Merge branch 'add-power-button-support' into 'master'

Create boxomon-rpi and add power-button configuration scripts.

See merge request justin/boxomon!4

README.md

@@ -24,7 +24,12 @@ A birthday gift (long-running) for my girlfriend! Boxomon is a cute toy that, wh
 ## Version 0.2.2
 - Tweaks to text to make the app as close to the original as possible.
 
+## Version 0.3.0
+- Edge-deployed device - a true Boxomon-successor!
+- Deployed on a raspberry PI with minimal effort, autostarting Chromium, configuring a PiTFT Plus touchscreen, and adding button support.
+
 # Future work
+- Improved styling on the web interace
 - Tracking of if the message has been seen that day
 - Authentication and authorization
-- Edge-deployed device - a true Boxomon2
+

deploy/boxomon-charts/backend/Chart.yaml

 apiVersion: v1
-appVersion: "0.2.2"
+appVersion: "0.3.0"
 description: A Helm chart for Kubernetes to deploy the boxomon backend
 name: backend
-version: 0.2.2
+version: 0.3.0

deploy/boxomon-charts/frontend/Chart.yaml

 apiVersion: v1
-appVersion: "0.2.2"
+appVersion: "0.3.0"
 description: A Helm chart for Kubernetes
 name: frontend
-version: 0.2.2
+version: 0.3.0

edge/button_interface.py

+#!/usr/bin/python3
+# -*- coding: utf-8 -*-
+
+from collections import defaultdict
+from gpiozero import Button, PWMOutputDevice
+from signal import pause
+from subprocess import check_call
+
+def check_held(state_dict, threshold=2.0):
+    result = state_dict.get('held', 0) > threshold
+    state_dict['held'] = 0
+
+    return result
+
+def check_shutdown(state_dict):
+    print('Checking shutdown:', state_dict)
+    if check_held(state_dict):
+        state_dict['screen'].off()
+        check_call(['systemctl', 'halt'])
+        
+def check_restart(state_dict):
+    print('Checking restart:', state_dict)
+    if check_held(state_dict):
+        check_call(['systemctl', 'reboot'])
+
+def toggle_screen(state_dict):
+    print('Checking screen toggle:', state_dict)
+    state_dict['screen'].toggle()
+
+def set_held(state_dict, delta=0.05):
+    print('Setting hold:', state_dict)
+    state_dict['held'] = state_dict.get('held', 0) + delta
+
+def configure_button(button_spec_dict, button_state_dict):
+    button = Button(button_spec_dict['button'], hold_time=0.05, hold_repeat=True)
+    button.when_held = lambda: button_spec_dict['onhold'](state_dict=button_state_dict)
+    button.when_released = lambda: button_spec_dict['onrelease'](state_dict=button_state_dict)
+
+    return button
+
+def main():
+    CONFIG = {
+        "shutdown": {
+            "button": 17,
+            "onhold": set_held,
+            "onrelease": check_shutdown
+        },
+        "reboot": {
+            'button' : 22,
+            'onhold': set_held,
+            'onrelease': check_restart
+
+    },
+        "screen toggle": {
+            'button': 23,
+            'onhold': lambda state_dict: None,
+            'onrelease': toggle_screen
+        },
+    }
+
+    STATE = defaultdict(dict)
+
+    buttons = {}
+
+    screen_pin = PWMOutputDevice(18, initial_value=1)
+    
+    for name, conf_dict in CONFIG.items():
+        state_dict = STATE[name]
+        state_dict['screen'] = screen_pin
+        buttons[name] = configure_button(conf_dict, STATE[name])
+
+    pause() # wait forever
+
+if __name__ == "__main__":
+    main()
+

edge/button_interface.service

+[Unit]
+Description=GPIO shutdown button
+After=network.target
+
+[Service]
+Type=simple
+Restart=always
+RestartSec=1
+User=root
+ExecStart=/usr/local/bin/button_interface.py
+StandardOutput=journal
+StandardError=journal
+
+[Install]
+WantedBy=multi-user.target
\ No newline at end of file

edge/deploy.sh

+#!/bin/bash
+
+SCRIPT_FILE=${1-button_interface.py}
+SERVICE_FILE=${2-button_interface.service}
+
+sudo apt install python3-gpiozero
+sudo mkdir -p /usr/local/bin
+sudo cp $SCRIPT_FILE /usr/local/bin/$SCRIPT_FILE
+sudo cp $SERVICE_FILE /etc/systemd/system/$SERVICE_FILE
+sudo systemctl daemon-reload
+sudo systemctl enable $SERVICE_FILE
+sudo systemctl start $SERVICE_FILE
+sudo systemctl restart $SERVICE_FILE