**Pull request in [esphomedocs](https://github.com/OttoWinter/esphomedocs) with documentation (if applicable):** OttoWinter/esphomedocs#<esphomedocsPRnumbergoeshere>
**Pull request in [esphomelib](https://github.com/OttoWinter/esphomelib) with C++ framework changes (if applicable):** OttoWinter/esphomelib#<esphomelibPRnumbergoeshere>
## Example entry for YAML configuration (if applicable):
```yaml
```
## Checklist:
- [ ] The code change is tested and works locally.
- [ ] Tests have been added to verify that the new code works (under `tests/` folder).
- [ ] Check this box if you have read, understand, comply, and agree with the [Code of Conduct](https://github.com/OttoWinter/esphomeyaml/blob/master/CODE_OF_CONDUCT.md).