* Ensure we only add a sensor once
* Ensure that we dont process updates for entities that arent what we were setup for
* Add debug logging to ease development of apps
* Use str representation
## Description:
**Related issue (if applicable):** fixes#21782
## Checklist:
- [x] The code change is tested and works locally.
- [x] Local tests pass with `tox`. **Your PR cannot be merged unless tests pass**
- [x] There is no commented out code in this PR.
Paulus Schoutsen
cgtobi
Robbie Trencheny