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nrf/softdevice : Add function to set the BT address #17406

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nrf/softdevice : Add function to set the BT address #17406

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@Blafy Blafy commented Jun 1, 2025 •
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Summary

On NRF port, this PR implements sd_ble_gap_addr_set from the Soft Device API. You can customize the bluetooth mac address.

Testing

I have only tested it on a Xiao BLE board with SD v140.

Connected to MicroPython at /dev/ttyACM0
Use Ctrl-] or Ctrl-x to exit this shell
MicroPython v1.26.0-preview.163.gdf80ad06c on 2025-06-01; XIAO nRF52840 Sense with NRF52840
Type "help()" for more information.
>>> a = bytearray([0xa1,0xba,0xc1,0xa4,0x3c,0x23])
>>> import ble
>>> ble.address()
'c8:e6:c1:a4:3c:f3'
>>> ble.address_set(a)
>>> ble.address()
'a1:ba:c1:a4:3c:23'
>>>

Trade-offs and Alternatives

This is my first PR, and I am quite rusty with C. I am not sure if this is a clean binding, as I am not familiar with the MP_* objects and methods. Also, I have set the addr_type to BLE_GAP_ADDR_TYPE_PUBLIC.

Maybe it is better to have only a ble.address() method with 2 signatures instead (0 argument = get, otherwise set) ?

@Blafy
nrf/softdevice : Add function to set the BT address.
c06b6df 
Signed-off-by: Blafy <alban.boye@protonmail.com>
@Blafy Blafy force-pushed the nrf_ble_address_set branch from df80ad0 to c06b6df Compare June 1, 2025 13:47
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@Blafy @dpgeorge
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