I have a problem - wrote a programe, for pH measurement, with multiple choice to make a titrator. The programme itself works erfectly on my computer, I can communicate with the arduino with keybord commands without any problem.
When I move it to another computers, It starts, the setup run, and if I hit one key to run a part of programe, it starts to overflow, and run again, and again, a thousand times... if i hit another key to activate another part of programme, the second option overflow the screen. (baud okay, on my original computer it works perfectly, run once, and wait for another command).
Do you have any idea, what can cause it? I tried with 4 different laptops, and same problems appeared on every one.