RAKWireless/RAKwireless-Arduino-BSP-Index

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jpmeijers commented

We've had this problem before. It was fixed, but seems like it's back again after updating the BSP to the one in the repo.

Sketch uses 123776 bytes (15%) of program storage space. Maximum is 815104 bytes.
Global variables use 15356 bytes (6%) of dynamic memory, leaving 222212 bytes for local variables. Maximum is 237568 bytes.
Upgrading target on /dev/ttyACM0 with DFU package /tmp/arduino_build_754762/RAK4631-DeepSleep-LoRaWan.ino.zip. Flow control is disabled, Single bank, Touch disabled
###############################Timed out waiting for acknowledgement from device.

Failed to upgrade target. Error is: No data received on serial port. Not able to proceed.
Traceback (most recent call last):
  File "/home/jpmeijers/.local/lib/python3.8/site-packages/nordicsemi/__main__.py", line 294, in serial
    dfu.dfu_send_images()
  File "/home/jpmeijers/.local/lib/python3.8/site-packages/nordicsemi/dfu/dfu.py", line 235, in dfu_send_images
    self._dfu_send_image(HexType.APPLICATION, self.manifest.application)
  File "/home/jpmeijers/.local/lib/python3.8/site-packages/nordicsemi/dfu/dfu.py", line 206, in _dfu_send_image
    self.dfu_transport.send_firmware(firmware)
  File "/home/jpmeijers/.local/lib/python3.8/site-packages/nordicsemi/dfu/dfu_transport_serial.py", line 213, in send_firmware
    self.send_packet(pkt)
  File "/home/jpmeijers/.local/lib/python3.8/site-packages/nordicsemi/dfu/dfu_transport_serial.py", line 243, in send_packet
    ack = self.get_ack_nr()
  File "/home/jpmeijers/.local/lib/python3.8/site-packages/nordicsemi/dfu/dfu_transport_serial.py", line 282, in get_ack_nr
    raise NordicSemiException("No data received on serial port. Not able to proceed.")
nordicsemi.exceptions.NordicSemiException: No data received on serial port. Not able to proceed.

Possible causes:
- Selected Bootloader version does not match the one on Bluefruit device.
    Please upgrade the Bootloader or select correct version in Tools->Bootloader.
- Baud rate must be 115200, Flow control must be off.
- Target is not in DFU mode. Ground DFU pin and RESET and release both to enter DFU mode.
jpmeijers commented

Updating bootloader definitely helps.