I have successfully used the guide for BLE DFU.
But now I have trouble using the DFU via serial port. Do you have a guide for serial DFU?
I have tried two things.
A) Use prebuilt test images.
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Use nRFgo to program the DFU test images on V14: softdevice_bootloader_secure_serial_debug_without_bonds_s132.hex and ble_app_buttonless_dfu_without_bonds_s132_with_setting_page.hex
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When device boots up, it goes to application mode with LED1 blinking.
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Press Button4+Reset, LED3 is not on, but LED1 and LED4 are on. Don't know what state it is in.
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Run nrfutil dfu serial -pkg ble_app_buttonless_dfu_without_bonds_s132.zip -p COM5 got error, and LED2 and 4 are on.
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Traceback (most recent call last):
File "nordicsemi\__main__.py", line 872, in <module>
File "site-packages\click\core.py", line 722, in __call__
File "site-packages\click\core.py", line 697, in main
File "site-packages\click\core.py", line 1066, in invoke
File "site-packages\click\core.py", line 1066, in invoke
File "site-packages\click\core.py", line 895, in invoke
File "site-packages\click\core.py", line 535, in invoke
File "nordicsemi\__main__.py", line 656, in serial
File "nordicsemi\dfu\dfu.py", line 122, in dfu_send_images
File "nordicsemi\dfu\dfu.py", line 83, in _dfu_send_image
File "nordicsemi\dfu\dfu_transport_serial.py", line 190, in open
File "nordicsemi\dfu\dfu_transport_serial.py", line 314, in __ping
pc_ble_driver_py.exceptions.NordicSemiException: No ping response
Failed to execute script __main__
B) Built own images
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Built bootloader_secure_serial with own key, program it from Keil
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Built ble_app_buttonless_dfu in Keil, program the app and softdevice from Keil
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When device boots, LED1 and 3 are on. Seems it goes to DFU mode, and cannot go to application mode.
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Run nrfutil dfu serial -pkg package.zip -p COM5 got the same error message as A), and LED2 and 3 are on.