MQTT device target_temperature configurable value min/max/decimals/step capabilityOptions

[oh2th]

MQTT devices as thermostats should allow configurable minimum and maximum values for target_temperature similar to what Virtual Devices does.

Then this type of device would be usable for thermostats in saunas (over 60C) or a spa (at 36-37C), which are outside the Homey default 35C maximum.

So when adding a device with target_temperature capability, allow editing decimals, min, max and step value:

And store them with the settings.topics JSON for future edits to the capability. For example in my se case for the Spa I would have:

{
  "measure_temperature": {
    "capability": "measure_temperature",
    "valueDecimals": "1",
    "stateTopic": "ble/vaasanrinne7/spa_vesi",
    "setTopic": "",
    "valueTemplate": "t / 10",
    "outputTemplate": "",
    "displayName": "Water"
  },
  "target_temperature": {
    "capability": "target_temperature",
    "valueDecimals": "1",
    "valueMin": "15",
    "valueMax": "40",
    "valueStep": "0.5",
    "stateTopic": "ble/vaasanrinne7/spa_vesi",
    "setTopic": "ble/vaasanrinne7/spa_vesi/set",
    "valueTemplate": "tt / 10",
    "outputTemplate": "",
    "displayName": "Set Temperature",
  }
}

This min/max/step option should be there for any number type as is described in the API docs for number:
https://apps.developer.homey.app/the-basics/devices/capabilities#number-capability-options

Including also units would be a bonus, but is off topic for target_temperature.