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https://forum.arduino.cc/t/optrex-c-51505-20x2-lcd-issues/258450
Optrex C-51505 20x2 LCD issues - Displays - Arduino Forum
Sep 18, 2014 - I'm new to the Arduino world and recently picked up a proMicro board. The layout of the board is as follow:...
optrexcissuesdisplaysarduino