Hi! I have this project to do but suddenly i encounter this
??? Error using ==> arduino>arduino.arduino at 101
Connection unsuccessful, please make sure that the Arduino is
powered on, running either srv.pde, adiosrv.pde or mororsrv.pde,
and that the board is connected to the indicated serial port. You
might also try to unplug and re-plug the USB cable before
attempting a reconnection.