Forget to update package len.
Add rtc define register.
Clean up, and move defines into separate header.
Silent log.
Shut down slave.
Add rtc cfg.
Move some rtc settings in cfg file. Fix rtc init.
Add time in measure.
Fix alarm set.
Init rtc.
Leave rcc on for rtc alarm.
Start to lite cmd protocol. Use rtc for timeout.
WIP
Insert timestamp into proto struct to sync all modules.
Reformat.
Simplify the protocol, leave only monitor poll in master. Unify the main
functions.
Reply nack only if the register is empty. Use log and reformat.
Define default cfg to save space.
Add comment.
Remove vim undo files.