korau:~/nrfutil-update# nrfutil dfu root@ethread -pkg ~/firmware-update-image/soap_dispenser_app_dfu_1002010.zip -p /dev/ttyACM0 --channel 21  --panid 4660
Address not specified. Using ff03::1 (all Thread nodes)
Using connectivity board at serial port: /dev/ttyACM0
2019-11-22 15:37:25,601 Failed to reset NCP. Please flash connectivity firmware.
Traceback (most recent call last):
  File "/usr/lib/python3.7/site-packages/nordicsemi/__main__.py", line 1378, in thread
    transport.open()
  File "/usr/lib/python3.7/site-packages/nordicsemi/thread/tncp.py", line 224, in open
    raise Exception('Failed to reset NCP. Please flash connectivity firmware.')
Exception: Failed to reset NCP. Please flash connectivity firmware.