Cannot upload the code to Hercules Dual 15A 6-20V Motor Controller

I have the same issue. I can’t send any code to the Hercules board.


  • In the Arduino editor, I’ve set the port to the UARTSbee, Board to Duemilanove, Processor to ATMega328P
  • I have then connected the UARTSBee to the Hercules board. The board is not powered by the battery back.
  • When I connect the UARTSBee to the computer (Mac or PC, tried both) it lights up, and the Hercules power also lights up.
  • Any time I try to update a sketch I get



    avrdude: stk500_recv(): programmer is not responding

    avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x00




    And I get exactly the same if the UARTSBee is disconnected from the Hercules.



    Q. What am I missing?

    Q. Should the UARTSBee be set to 3v or 5v?

    Q. Why can’t the UARTSBee communicate with the Hercules?



    Any help gratefully received!



    -John