Re: [Bluez-devel] How to confirm if a device has DFU support (dfutool)?

Marcel Holtmann
2007-11-01T05:04:10Z

Hi Raul,

> I'm trying to backup the firmware from a Conceptronic CBT100U USB
> Bluetooth dongle using dfutool, and the message I get after selecting
> the device is:
>
> # dfutool -dhci0 archive file.dfu
> ...
> "Can't identify device with DFU mode"
> #
>
> I understand this could mean this chip manufacturer does NOT support DFU,
> although it is a CSR-based device, and mostly all CSR based modules and dongles
> support DFU. How can I confirm if DFU is supported?

that is plain wrong. Most CSR based devices are nowadays ROM chips and
don't support DFU anymore. However check /proc/bus/usb/devices, it will
tell you exactly if it is supported or not.

Regards

Marcel