I've recently bought an arduino 2560. I installed the correct drivers and selected the right COM-port and arduino in the arduino program.
However, when I want to upload a sketch to the arduino, nothing happens. It starts compiling the sketch and when it says uploading the loading bar freezes around 80% of the uploading and keeps saying 'uploading'. it doesn't give an error message or something but the sketch isn't uploading.
When I press reset on the arduino, the orange led (AREF) starts blinking. And when I want to try to upload it again it says:
COM-PORT already in use (sketch is still not uploaded.) I've read about the '!!!' bug. I don't have '!!!' in my sketch. I really don't know what to do or how to make it work.
I also tried uploading the sketch to my arduino UNO, and that works just fine..
I would really like to know what to do and how to make it work
thanks for any response