C:\Users\Jon\Desktop\tmp>nrfutil nrf5sdk-tools -v -v -v -v dfu serial -pkg image.zip -p COM11 -b 115200 -fc 0 -t 5
2023-01-09 09:13:30,342 Using board at serial port: COM11
2023-01-09 09:13:30,342 Sending SoftDevice image...
2023-01-09 09:13:38,464 SLIP: --> [9, 1]
2023-01-09 09:13:39,465 Serial: No ping response
2023-01-09 09:13:39,465 SLIP: --> [9, 2]
2023-01-09 09:13:40,479 Serial: No ping response
2023-01-09 09:13:40,479 SLIP: --> [9, 3]
2023-01-09 09:13:41,479 Serial: No ping response
2023-01-09 09:13:41,479 SLIP: --> [9, 4]
2023-01-09 09:13:42,483 Serial: No ping response
2023-01-09 09:13:42,483 SLIP: --> [9, 5]
2023-01-09 09:13:43,489 Serial: No ping response
Traceback (most recent call last):
  File "nordicsemi\__main__.py", line 1555, in <module>
  File "click\core.py", line 1137, in __call__
  File "click\core.py", line 1062, in main
  File "click\core.py", line 1668, in invoke
  File "click\core.py", line 1668, in invoke
  File "click\core.py", line 1404, in invoke
  File "click\core.py", line 763, in invoke
  File "nordicsemi\__main__.py", line 1073, in serial
  File "nordicsemi\__main__.py", line 990, in do_serial
  File "nordicsemi\dfu\dfu.py", line 119, in dfu_send_images
  File "nordicsemi\dfu\dfu.py", line 88, in _dfu_send_image
  File "nordicsemi\dfu\dfu_transport_serial.py", line 214, in open
pc_ble_driver_py.exceptions.NordicSemiException: No ping response after opening COM port
[7760] Failed to execute script '__main__' due to unhandled exception!

C:\Users\Jon\Desktop\tmp>nrfutil nrf5sdk-tools -v -v -v -v dfu serial -pkg image.zip -p COM19 -b 115200 -fc 0 -t 5
2023-01-09 09:13:56,775 Using board at serial port: COM19
2023-01-09 09:13:56,775 Sending SoftDevice image...
2023-01-09 09:14:00,291 SLIP: --> [9, 1]
2023-01-09 09:14:01,312 Serial: No ping response
2023-01-09 09:14:01,312 SLIP: --> [9, 2]
2023-01-09 09:14:02,340 Serial: No ping response
2023-01-09 09:14:02,340 SLIP: --> [9, 3]
2023-01-09 09:14:03,356 Serial: No ping response
2023-01-09 09:14:03,356 SLIP: --> [9, 4]
2023-01-09 09:14:04,377 Serial: No ping response
2023-01-09 09:14:04,377 SLIP: --> [9, 5]
2023-01-09 09:14:05,419 Serial: No ping response
Traceback (most recent call last):
  File "nordicsemi\__main__.py", line 1555, in <module>
  File "click\core.py", line 1137, in __call__
  File "click\core.py", line 1062, in main
  File "click\core.py", line 1668, in invoke
  File "click\core.py", line 1668, in invoke
  File "click\core.py", line 1404, in invoke
  File "click\core.py", line 763, in invoke
  File "nordicsemi\__main__.py", line 1073, in serial
  File "nordicsemi\__main__.py", line 990, in do_serial
  File "nordicsemi\dfu\dfu.py", line 119, in dfu_send_images
  File "nordicsemi\dfu\dfu.py", line 88, in _dfu_send_image
  File "nordicsemi\dfu\dfu_transport_serial.py", line 214, in open
pc_ble_driver_py.exceptions.NordicSemiException: No ping response after opening COM port
[13396] Failed to execute script '__main__' due to unhandled exception!

C:\Users\Jon\Desktop\tmp>nrfutil nrf5sdk-tools -v -v -v -v dfu serial -pkg image.zip -p COM11 -b 115200 -fc 0 -t 5
2023-01-09 09:14:19,493 Using board at serial port: COM11
2023-01-09 09:14:19,508 Sending SoftDevice image...
2023-01-09 09:14:27,632 SLIP: --> [9, 1]
2023-01-09 09:14:27,648 SLIP: <-- [96, 9, 1, 1]
2023-01-09 09:14:27,648 Serial: Set Packet Receipt Notification 0
2023-01-09 09:14:27,648 SLIP: --> [2, 0, 0]
2023-01-09 09:14:27,664 SLIP: <-- [96, 2, 1]
2023-01-09 09:14:27,664 SLIP: --> [7]
2023-01-09 09:14:27,680 SLIP: <-- [96, 7, 1, 131, 0]
2023-01-09 09:14:27,680 Sending init packet...
2023-01-09 09:14:27,680 Serial: Selecting Object: type:1
2023-01-09 09:14:27,680 SLIP: --> [6, 1]
2023-01-09 09:14:27,695 SLIP: <-- [96, 6, 1, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
2023-01-09 09:14:27,695 Serial: Object selected:  max_size:512 offset:0 crc:0
2023-01-09 09:14:27,695 SLIP: --> [1, 1, 76, 0, 0, 0]
2023-01-09 09:14:27,711 SLIP: <-- [96, 1, 1]
2023-01-09 09:14:27,711 Serial: Streaming Data: len:76 offset:0 crc:0x00000000
2023-01-09 09:14:27,711 SLIP: --> [8, 10, 74, 8, 1, 18, 70, 8, 255, 255, 255, 255, 15, 16, 52, 26, 4, 128, 2, 202, 1, 32, 1, 40, 180, 172, 9, 48, 0, 56, 0, 66, 36, 8, 3, 18, 32, 210, 175, 14, 247, 28, 107, 0, 155, 114, 124, 206, 197, 128, 249, 73, 193, 154, 247, 2, 76, 100, 78, 225, 17, 33, 202, 197, 208]
2023-01-09 09:14:27,711 SLIP: --> [8, 16, 240, 42, 25, 72, 0, 82, 4, 8, 1, 18, 0]
2023-01-09 09:14:27,711 SLIP: --> [3]
2023-01-09 09:14:27,726 SLIP: <-- [96, 3, 1, 76, 0, 0, 0, 81, 196, 170, 55]
2023-01-09 09:14:27,726 SLIP: --> [4]
2023-01-09 09:14:27,742 SLIP: <-- [96, 4, 11, 8]
Traceback (most recent call last):
  File "nordicsemi\__main__.py", line 1555, in <module>
  File "click\core.py", line 1137, in __call__
  File "click\core.py", line 1062, in main
  File "click\core.py", line 1668, in invoke
  File "click\core.py", line 1668, in invoke
  File "click\core.py", line 1404, in invoke
  File "click\core.py", line 763, in invoke
  File "nordicsemi\__main__.py", line 1073, in serial
  File "nordicsemi\__main__.py", line 990, in do_serial
  File "nordicsemi\dfu\dfu.py", line 119, in dfu_send_images
  File "nordicsemi\dfu\dfu.py", line 95, in _dfu_send_image
  File "nordicsemi\dfu\dfu_transport_serial.py", line 256, in send_init_packet
  File "nordicsemi\dfu\dfu_transport_serial.py", line 421, in __execute
  File "nordicsemi\dfu\dfu_transport_serial.py", line 502, in __get_response
pc_ble_driver_py.exceptions.NordicSemiException: Extended Error 0x08: The init packet does not contain a signature, but this bootloader requires all updates to have one.
[14256] Failed to execute script '__main__' due to unhandled exception!

C:\Users\Jon\Desktop\tmp>