Hello Sir, with a group of students we're trying to use the ARCS software and when trying to produce a movement using the "+" and "-" buttons, we run in the error "name ser not defined". I saw the other post about that, and since we don't have the budget for buying a Teensy 3.5, we went back to AR2 (wich only requires an Arduino 2560 to work if I'm not mikstaking). Unfortunately, we ran into the same error, so I'd like to know if you have any advice ? Best regards.