Custom nRF21540 DTM UART pins

[rikhard]

Dear nRF,

I know this topic has been covered many times, but I am unsure how I can change the uart pins for BLE 2-wire? I have not found any configuration for it inside dtm source code in SDK. 

I have custom board that has nRF52840 + nRF21540 FEM, the design is copied from nRF21540db, but my current version does not have P0.08 and P0.06 which are default ones, but I have easy access to P0.25 and P1.00, and I would like to use those for the BLE 2wire interface for Anritsu MT8852B.

Thanks for any support!

[Kenneth]

Hello,

If you haven't already I suggest to check out:
https://academy.nordicsemi.com/courses/nrf-connect-sdk-fundamentals/ 

Once you are familiar with devicetree and how to make overlay files, then you will be able to modify or add the nrf21540:
https://github.com/nrfconnect/sdk-zephyr/blob/main/boards/arm/nrf21540dk_nrf52840/nrf21540dk_nrf52840.dts#L113 

Kenneth