Hi,If you are using windows, | Miscellaneous › Others › avrdude: ser_open(): can’t open device “com4”: › Hi,If you are using windows, March 19, 2014 at 1:49 pm #11338 AJISH ALFREDParticipant Hi, If you are using windows, go to control panel >> device manager and check whether your device is properly listed there as com4. If it is not com4 change the port number accordingly in the avrdude.
