I am very new, and I want to know if my project is even feasible.
I would like to drive three lights to turn on independently based on a string of data in a file on my PC. I need a file (txt, other???)on my PC to contain the string "100" and use that string to turn on light 1, but leave light 2 & 3 off. Then I would like to use a push button at light 1 to confirm that it came on. Once this confirmation takes place, then I want to read the next sting of data in the pc file that might read "101". This time I will push button 1 and button 3 independently, and in random order, to confirm, and then continue.
Maybe I will add error feedback if I push a button when that light is turned off. I don't know.
Do I need an ethernet shield to do this type of communication?