@printoverse said in Firmware upload Duet 3 6HC:
The responce that i get is "Writing Page 0 (0%)". No matter how long i leave the programm running, it won't progress. i even tried diffrent versions of the "Duet3Firmware_MB6HC.bin".
When flashing firmware, the microcontroller on the 6HC is unfortunately rather fussy about the type of USB cable and USB port. So try a different USB cable, and/or a different USB port on the PC.