I'm using Arduino Uno R3 and the official Arduino WiFi Shield R3. I'm trying to update the Shield's firmware to 1.1.0 through this guide.

Everything goes fine until Step 9. When I execute the code in Step 10, I get an error (see attachment) as:

AtLibUsbDfu: 3EB 2FF8 no device present

FAIL Could not open USB device.

ISP done.

enter image description here

EDIT: I re-installed the firmware on my shield and now the problem's gone.


I cant comment because of reputation... You've already upgraded the firmware. Just when you try upgrading again your wifi device is rebooting itself because of upgrading before.

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Many of the online instructions do not work. This one does - http://arduinotronics.blogspot.com/2015/06/upgrading-arduino-wifi-shield-firmware.html

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