I’ll be using a microchip GPIO port expander to enable a simple LCD display and 5 button menu control.
Custom character creation for bar graph display understood
Basic bar graph constructed, but needs cleanup
Concerned about display responsiveness
I2C connection is great for low wire count, but refresh rate is a bit concerning. Signal strength meter may be jumpy???
Pilot LCD PCB (engineering build) expected to be completed
Need to determine push button switches (or capacitive)
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 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