Lenovo ThinkSmart View ROM/OS Development

Hardware
490

I have a silly solution that’s been working well enough for my needs:

shell_command:
  set_wallpanel_brightness: ssh -i /config/id_ed25519_thinksmart -o StrictHostKeyChecking=no [email protected] 'echo {{ level }} > /sys/class/backlight/backlight/brightness'
  wallpanel_restart_dashboard: timeout 10 ssh -i /config/id_ed25519_thinksmart -o StrictHostKeyChecking=no [email protected] './dashboard.sh'

id_ed25519_thinksmart is just a SSH key I generated in my HA config directory, whose pubkey I deployed to the ThinkSmart device (in ~/.ssh/authorized_keys).

'./dashboard.sh' is just a shell script on the device that kills Firefox and starts it again in Kiosk mode. In practice I never really need to do this, but it’s nice having a way to force the device back into its “good” state if needed. Just to be safe, I have an automation trigger this nightly.

These become actions that you can call in Scripts/Automations, e.g.

action: shell_command.set_wallpanel_brightness
data:
  level: 1000 # Any number 0-4095 works here

I’m not sure what command would turn the display completely off and back on (dpms doesn’t seem to be available), but a backlight brightness of 0 is extremely dim and not distracting IMO.

You can also use SSH commands to populate sensors / read values:

command_line:
  - sensor:
      name: ThinkSmart View Used Memory Percentage
      unique_id: wallpanel-ssh-used-memory
      command: ssh -i /config/id_ed25519_wallpanel -o StrictHostKeyChecking=no [email protected] -- free | grep Mem | awk '{print $3/$2 * 100.0}'
      unit_of_measurement: '%'
      scan_interval: 15
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