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v.9 PCB is mostly evaluated
minor error in silkscreen on the voltage divider for monitoring battery voltage. The schematic is correct.
drill size of I2C LCD header was too small.
Both items are corrected
Software development
Both Arduino Arduinos are functioning
Basic PI code is running and evaluation will start on sending meaningful timing parameters to the PI controller
Pressing ‘SELECT’ will display the battery voltage
low battery detection automatically every 30s
TODO: shut down PI timing entirely when battery is low