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lcd2serial

Reads out a 7-segment LCD display and sends the value via serial.

How to port another display?

Analyse the display pins. You can use the ProMicro as a logic analyzer, to find the relevant segment pins and the common pins.

You can use the information provided here: https://lowpowerlab.com/forum/projects/moteino-kitchen-scale/

To use the Pro Micro together with PulseView you can use this repository: https://github.com/gillham/logic_analyzer

For more Information on LCD display consult: http://awawa.hariko.com/avr_lcd_drive_en.html

possible improvements

error handlich of the serial connection. (If screen is kill in operation. The microcontroller needs a restart to reset the serial connection)
handle all 4 digits by the print_digit() function.