I am currently dealing with a strange problem when trying to use DFU OTA. When I enter DFU mode on Master Control Panel and try and update I get the following two error messages. "Device does not have required DFU Service" followed by "Failed to open Transport Backend".
Looking up this error on these forums seemed to imply that the issue might be related to not running Master control panel as an administrator, however I don't think this could be the issue because I can update my device successfully when it only has the bootloader and softdevice on it and advertises as DfuTarg.
I have also tried to update my device using the NRFConnect App for android, there I get the message "Error 133(0x85) GATT ERROR" in the log and nothing else.
I am using SDK11 and the peer manager for this project. I followed this example to set up the peer manager for dfu: devzone.nordicsemi.com/.../
