avrdude: stk500_getsyn(): not in sync_resp=0*00
avrdude: stk500_disable: protocol error, expect=0*14,resp=0*51

These are the errors occurring when I am trying to upload to the board.
I've tried all the suggestions that suggested in this. When I am trying to burn the bootloader the same error is showing.

  • 1
    You forgot to add the link referred by "this". – Bence Kaulics Mar 23 '17 at 15:36
  • What board and serial port have you selected? – Mikael Patel Mar 23 '17 at 16:22

I don't know if I got the exact error (maybe another sync error), but what helped in my case (in this order, try again every time):

  • Reinsert the USB cable
  • Use a different (shorter) USB cable
  • Put the USB cable in another USB port
  • Restart the Arduino IDE
  • Restart the computer
  • Reinstall the Arduino IDE
  • Go to device drivers (control panel), check for COM ports, remove Arduino and reinstall

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