ah.. did you mean to say that my program will restart **whenever ** a serial Monitor or similar program is opened.
You could at a push solder some tiny wires to a toggle switch or something to be able to switch it on and off
Just to thwart your plan RL, there aren't any holes........
Holes?, holes?, we don't need no stinkin holes. Just tack solder the two header pins to the pads.Or get a Seeeduino, there great.Lefty