Need to fix up I2C so that the CPU stops stalling (same issue as electronic calendar project)
Need to add ADC stuff and add to telemetry
Need to make up my mind with backup battery stuff. May end up just tying the battery directly to the backup RTC and letting the MCU die on power removal.
Need to automatically save/restore time into backup RTC
Add BLE code if that's something you actually want to try
Added most of MCU firmware for clock.
Pending firmware issues: