Works with smart-dimmer-controller — simple arduino based dimmer (control knob and relays block). Does not work w/o it.
https://www.notion.so/thsm/Bedroom-smart-dimmer-1dd0ee25dcf441faa2192ac34c264b4e
fix rpi uart before: https://www.raspberrypi.org/documentation/configuration/uart.md timeout -- that's why readline() get full command string at once