I am an electrical engineer, for some reason people think I can program, bleh. This means I have to teach myself and to learn new things and Arduino seems to be very simple and straight forward for some things. I have run in to a snag.
I have a 16x4 LCD and am using I2C bus. Currently I am reading the address and comparing to an address that is predetermined by the manufacturer and then running an if statement. I have everything I want to be displayed and I can scroll. I am having some fun with this. Now, I need to update a number without updating anything else. First I thought subroutine, was told that's not a thing in Arduino, then function, hmmm can I have just this one value change when it changes? I thought maybe a a function that displays this value or maybe just a if function? I cannot seem to understand.