Comment on homeassistant

• realitaetsverlust@piefed.zip ⁨2⁩ ⁨months⁩ ago

  Yes. It’s not a kettle as in the pot you put on the stove, but an electric water … heater … thingy. I honestly have no idea how to call it in english. The german word would be “Heißwasserspender”, literally translating to “hot water dispenser”. I disassembled it, soldered a tiny raspberry pi board to it that could control the device as you could with the buttons and wrote a rudimentary API that I now control via home assistant.

  Within HA, I can control the kettle via calling the API of the pi. For example, I got a script that triggers if my girlfriends phone is entering my WLAN-network.

  The call to the API looks like this:

  rest_command:
    kettle_set_params:
      url: "http://kettle.local"
      method: POST
      content_type: "application/json"
      payload: '{"amount": {{ amount }}, "temp": {{ temp }}}'
  

  It’s dynamic, so for the “default black tea” she likes, these are the arguments

  set_kettle_default_black_tea:
    alias: "Set Kettle"
    sequence:
      - service: rest_command.kettle_set_params
        data:
          amount: 500
          temp: 100
  

  And this is the trigger:

  - alias: "Start kettle when Ana home"
    trigger:
      - platform: state
        entity_id: device_tracker.pixel6_ana
        from: "not_home"
        to: "home"
        for: "00:00:10"
    condition:
      - condition: time
        after: "18:00:00"
        before: "20:00:00"
    action:
      - service: script.set_kettle_default_black_tea
  

  That call is received by the pi, who then triggers the kettle. So every time my girlfriends phone is entering the wifi, it’s between 18:00 and 20:00 and there’s a cup present (done via a simple proximity sensor that I glued to the side of the kettle. That’s also not known to the home assistant, I didn’t really know how to feedback that information to it so I just had it handled by the pi itself), the kettle triggers and dispenses hot water. She can also do it manually via the home assistant app, I made a widget for that where you can just select temperature, amount and that’s it.

  I just hope the thing never breaks because I reassembled it using superglue, but then I noticed I forgot to install SSH on the pi, making it kinda an isolated piece of software that I just hope keeps running indefinitely lol.

  original