- Fix build issue with UART component when building with Arduino and CDC [esphome#5964](https://github.com/esphome/esphome/pull/5964) by [@kbx81](https://github.com/kbx81)
- Fix I2CBus::write() bug and add i2c documentation [esphome#5947](https://github.com/esphome/esphome/pull/5947) by [@DrCoolzic](https://github.com/DrCoolzic)
- Add deep sleep between updates for waveshare epaper 1.54in and 1.54inv2 [esphome#5961](https://github.com/esphome/esphome/pull/5961) by [@mathieu-mp](https://github.com/mathieu-mp)
- Speed up writing protobuf strings/bytes [esphome#5828](https://github.com/esphome/esphome/pull/5828) by [@bdraco](https://github.com/bdraco)
- Bump aioesphomeapi to 21.0.1 [esphome#5969](https://github.com/esphome/esphome/pull/5969) by [@bdraco](https://github.com/bdraco)
