Using nRF21540 EK with nRF5340 Audio DK

I have successfully built an Auracast broadcaster transmitter using an nRF540 Audio DK and can stream to a pair of Samsung Galaxy Buds3 Pro with a Samsung Galaxy Tab S11 acting as the Auracast Assistant, Only problem is that the reception range is somewhat limited and I'd like to add an nRF21540 EK to maximise it.

I understand that the nRF21540 EK will plug directly onto the nRF5340 Audio DK, using a Murata MXHS83QE3000 cable to provide the RF link to the FEM module. What hardware link settings are required to use these two boards together please?

https://www.digikey.hk/en/products/detail/murata-electronics/MXHS83QE3000/1775923?s=N4IgTCBcDaILIA0ASBlAHAZgIoFEMAZCQBdAXyA

Also, what external antennas that are available from DigiKey etc. can you recommend for use with the nRF21540 EK for best performance (and legal transmission level) please?

Kind regards,

0 Kenneth 5 months ago

Hello,

This thread might be interesting https://devzone.nordicsemi.com/f/nordic-q-a/122997/help-with-the-nrf21540-on-the-nrf5340_audio-project

From my understanding you should check the following:

- Only use GPIO mode, because SPI pins are in use by audio codec.

- Also disable UARTE0 due to bullet point 6: https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/app_dev/device_guides/fem/fem_nrf21540_gpio_spi.html

Kenneth
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