Hello
I am trying to upgrade a nRF52840 dongle via USB but it fails every time. I tried with my Ubuntu laptop and with a Raspberry pi 4 with same failure.
nrfutil dfu usb-serial -pkg zephyr.zip -p /dev/ttyACM0 [##############----------------------] 40% 00:00:43Traceback (most recent call last): File "/home/pi/.local/bin/nrfutil", line 8, in <module> sys.exit(cli()) File "/usr/lib/python3/dist-packages/click/core.py", line 829, in __call__ return self.main(*args, **kwargs) File "/usr/lib/python3/dist-packages/click/core.py", line 782, in main rv = self.invoke(ctx) File "/usr/lib/python3/dist-packages/click/core.py", line 1259, in invoke return _process_result(sub_ctx.command.invoke(sub_ctx)) File "/usr/lib/python3/dist-packages/click/core.py", line 1259, in invoke return _process_result(sub_ctx.command.invoke(sub_ctx)) File "/usr/lib/python3/dist-packages/click/core.py", line 1066, in invoke return ctx.invoke(self.callback, **ctx.params) File "/usr/lib/python3/dist-packages/click/core.py", line 610, in invoke return callback(*args, **kwargs) File "/home/pi/.local/lib/python3.9/site-packages/nordicsemi/__main__.py", line 1032, in usb_serial do_serial(package, port, connect_delay, flow_control, packet_receipt_notification, baud_rate, serial_number, False, File "/home/pi/.local/lib/python3.9/site-packages/nordicsemi/__main__.py", line 988, in do_serial dfu.dfu_send_images() File "/home/pi/.local/lib/python3.9/site-packages/nordicsemi/dfu/dfu.py", line 127, in dfu_send_images self._dfu_send_image(self.manifest.application) File "/home/pi/.local/lib/python3.9/site-packages/nordicsemi/dfu/dfu.py", line 100, in _dfu_send_image self.dfu_transport.send_firmware(data) File "/home/pi/.local/lib/python3.9/site-packages/nordicsemi/dfu/dfu_transport_serial.py", line 301, in send_firmware response['crc'] = self.__stream_data(data=data, crc=response['crc'], offset=i) File "/home/pi/.local/lib/python3.9/site-packages/nordicsemi/dfu/dfu_transport_serial.py", line 474, in __stream_data response = self.__calculate_checksum() File "/home/pi/.local/lib/python3.9/site-packages/nordicsemi/dfu/dfu_transport_serial.py", line 412, in __calculate_checksum raise NordicSemiException('Did not receive checksum response from DFU target. 'pc_ble_driver_py.exceptions.NordicSemiException: Did not receive checksum response from DFU target. If MSD is enabled on the target device, try to disable it ref. https://wiki.segger.com/index.php?title=J-Link-OB_SAM3U
The upgrade starts only if I keep the RESET button pressed and kick the upgrade while I release the RESET button. Then it randomly stops and the error above is shown.
I don't understand why the MSD could be an issue as there is not Segger JLink hardware in the dongle, right?
Could you please help?
Thank you
