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@micropython MicroPython

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mycodedoesnotcompile2
Jul 20, 2026

Hello everyone,

As I discover this tiny but very amazing community of MicroPythonistas, I put up this automated build workflow for ProMicro (formerly known as SuperMini) cheap (but useful) devices:
https://github.com/mycodedoesnotcompile2/micropython_promicro_nrf52840

Thank you for your feedbacks !
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Replies: 3 comments · 3 replies

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Josverl
Jul 25, 2026
Collaborator Sponsor

Thanks for sharing,
I finally managed to figure out how to replace the bootloader on one of these clones.
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ricksorensen
Jul 26, 2026

Thanks- I like your implementation of machine_bitstream.c. Limited testing on my end with a XIAO NRF52840 (Sense) seems to work fine with NeoPIxel. Have you tested it much? Is that implementatoni only for the NRF52840?

Thanks again.
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@Josverl
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Josverl Jul 26, 2026
Collaborator Sponsor

I think you may have me confused with someone else.
Are you perhaps referring to #15482 ?
@ricksorensen
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ricksorensen Jul 26, 2026

I had not seen that one- this particular board seems to build off that one though. Thanks for the reference.
@jkorte-dev
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jkorte-dev Jul 26, 2026

Thanks- I like your implementation of machine_bitstream.c. Limited testing on my end with a XIAO NRF52840 (Sense) seems to work fine with NeoPIxel. Have you tested it much? Is that implementatoni only for the NRF52840?

Thanks again.

I have tested the bitstream driver with different nrf52840 boards (nice Nano, adafruit feather nrf52840)..It is limited to nrf52 because the clock frequency is hard coded. I decided to do that in my PR because clock frequency cannot bei changed on nrf52.
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Josverl
Jul 26, 2026
Collaborator Sponsor

Would is be useful to include information on the used softdevice in sys.implementation._softdevice="s140_nrf52_7_3_0" or similar ?
full disclosure : I know next to nothing about softdevices.

Also I notice you firmware identifies as sys.platform ="nrf" , whereas fi the SEEED_XIAO_NRF52 uses nrf52 for sys.platform (aka the port)

  print(sys.implementation)
   #  (name='micropython', version=(1, 28, 0, ''), _machine='XIAO nRF52840 Sense with NRF52840', _mpy=7942, _build='SEEED_XIAO_NRF52')
  print(sys.platform)
  # nrf52
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