OK I have this all working now.
This has been a big project for me. I bought a ProMicro and went crazy.
Now I have a pretty nice device that, when I want, can operate 2 2X16 LCDs.
Help here on this forum is amazing.
My device reads serial RS232 data that contains a bunch of data. It then decodes the data and turns on several LEDs according to my requirements.
I also included code that would show me the status of the actual code on two LCD displays.
Here is my last question for this thread...
Is it OK to just NOT plug in the LCDs if I am not using them? I am not doing anything with the status from the LCD so I am guessing that when I init the LCDs, it just times out and moves on.
Should I look for some smart way to know that the LCDs are not present and bypass all that code?
It is working fine now with no LCDs but my curious mind needs to know.
Greg