Can the 20x4 SerLCD hardware support read operations? If so, which ATMega I/O is connected to the LCD R/W control pin?
Example 12 here https://learn.sparkfun.com/tutorials/av … cd-library has a Serial Read programming example if that’s what you meant; otherwise I’d point you to the OpenLCD files https://github.com/sparkfun/OpenLCD/tre … re/OpenLCD
Also see the hookup guide HW overview for available pins/protocols https://learn.sparkfun.com/tutorials/av … e-overview
Reviewed the example and all the files, links. I guess what I need is a schematic or at least a partial schematic showing the ATMega pinout to the LCD controller bus. Couldn’t locate any routines, support, for reading the LCD; cursor position, busy, etc., in the existing library.