@ahollermann said in Duet WiFi dont work:

Well, I have followed the instructions on the page.

First, I deleted the firmware and actually, immediately finds the PC a device (Bossa program port). So far so good!
Then I picked out the right firmware (Duet2CombinedFirmware.bin) and burned it with "BOSSA 1.9.1" on the board. But once the firmware has been flashed, the PC does not recognize a device again ...

So what next?

When you flashed the firmware, did you check the Erase All, Lock, and Boot to Flash options?

Does your PC report an unknown USB device when you connect the Duet?

Check that the size of the firmware file you downloaded matches the size in GitHub.