Arduino upload problem: avrdude: stk500_getsync(): not in sync: resp=0x00

by Thomas Beutel

There are a number of good posts out there discussing problems with uploading sketches to an arduino, but my problem was really basic:

I had some wiring connected to digital ports 0 and 1 (TX and RX) and that was causing communication errors. I unplugged the wires to those ports and the upload then worked just fine.

Here is the post that helped me: