Use fan mode when heat/cool is idle in homekit

[Xeio]

Proposed change

For some Homekit thermostat device such as an Ecobee, there is a FAN_STATE_CURRENT field that can track the state of fan independently from whether the system is heating/cooling/idle. Since the HASS thermostat display already has a mode for displaying when the Fan is on this is just displaying when the fan is active using that existing HVACAction.FAN support when the cooler is idle.

This functionality also mirrors the way the Ecobee cloud integration behaves, showing a "Fan" state when the heat/cool is idle, but the fan is on (such as due to a fan hold, or minimum hourly runtime).

(Edit by @Jc2k to add Jc2k/aiohomekit@3.2.3...3.2.5)

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Stale

[Jc2k]

Nice!

Can you add the possible values for this characteristic to aiohomekit here https://github.com/Jc2k/aiohomekit/blob/main/aiohomekit/model/characteristics/const.py as an enum instead of having a const in the integration?

[Jc2k]

aiohomekit 3.2.5 has the enums needed now.