Add backlight toggling to Home Assistant

build/arduino.avr.uno/extras/configuration.yaml

@@ -19,3 +19,6 @@ sensor:
         value_template: '{{ states.sensor.weather_sensor.attributes["pressure"] | round(2)}}'
         friendly_name: Pressure soba
         unit_of_measurement: "hPa"
+
+shell_command:
+  toggle_backlight: /bin/bash -c "echo -n -e 'T' >> /dev/ttyV0"

build/arduino.avr.uno/extras/dashboard.yaml

@@ -0,0 +1,12 @@
+show_name: true
+show_icon: true
+type: button
+tap_action:
+  action: call-service
+  service: shell_command.toggle_backlight
+entity: sensor.weather_sensor
+name: Toggle backlight
+show_state: false
+hold_action:
+  action: more-info
+icon: mdi:lightbulb