* Add api missing_state attribute
Fixes https://github.com/esphome/issues/issues/828
Adds a new property for missing state, so that HA can now when a sensor does not have a state yet.
* Update api.proto
* add support for climate action:
Following hass implementation of climate, action represents the current action the climate device is perfoming, e.g. cooling or heating
fix bang_bang climate:
make sure that the thresholds are always respected.
fixes the issue where the component would just keep on heating, regardless of the temperature range
* Updates
- Use dedicated enum for action (otherwise it gets confusing because "auto" is not a valid action)
- Add field to tell HA that action is supported
- Revert semantic changes in bang_bang
* Conditional print
Co-authored-by: Otto Winter <otto@otto-winter.com>