Add turn_on method to ecobee climate platform

[marthoc]

Breaking Change:

Previously, calling climate.turn_on would cause the ecobee thermostat to turn on in heat mode, regardless of the mode when the thermostat was turned off. Now, the thermostat will turn on to the last "active" HVAC mode (i.e. "heat", "cool", or "auto") (or, if the thermostat was "off" when Home Assistant started, to "auto").

Description:

With no turn_on method in the ecobee climate platform, climate.turn_on was causing the ecobee thermostat to always turn on in "heat" mode (as a result of using the "fake" turn on in async_turn_on from the climate entity class). This PR adds a variable (self._last_active_hvac_mode) to track the last "active" (i.e. non-off) HVAC mode, and updates it in async_update with the latest non-off state retrieved from the ecobee API. And, the turn_on method sets the HVAC mode to the value contained in self._last_active_hvac_mode, which should be more intuitive for users.

Related issue (if applicable): fixes #27091

Pull request with documentation for home-assistant.io (if applicable): N/A

Example entry for configuration.yaml (if applicable):

N/A

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• The manifest file has all fields filled out correctly. Update and include derived files by running python3 -m script.hassfest.
• New or updated dependencies have been added to requirements_all.txt by running python3 -m script.gen_requirements_all.
• Untested files have been added to .coveragerc.

If the code does not interact with devices:

• Tests have been added to verify that the new code works.

[balloob]

Looks great! 1 tiny comment.

[marthoc]

Ready to go!

[balloob]

🎉 🎉 🎉 🎉

[balloob]

Actually thinking now (I know, maybe a little too late), shouldn't we make this part of the default turn_on command handling, for all climate entities ?

[marthoc]

@balloob you’re probably right... I’ll take a look!

[MarshallCS]

Thank you very much for working on this!