S21 and Night/Quiet mode

[revk]

We may have found an S21 message, try the latest beta and report back.

Thanks https://github.com/misterobotique

[gentlecat]

Seems to be working for me! Changing fan speed to "night" via remote also sets it correctly in Faikin. It also doesn't go back to "auto" after a few seconds, RPM looks correct.