https://devzone.nordicsemi.com/f/nordic-q-a/125717/using-nrf21540-ek-with-nrf5340-audio-dkI 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 somewhaten-USTelligent Community 13Thu, 20 Nov 2025 14:45:30 GMThttps://devzone.nordicsemi.com/thread/554928?ContentTypeID=1Thu, 20 Nov 2025 14:45:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9b17595b-9888-41af-8e2c-48c29a2acd4aKenneth<p>Hello,&nbsp;</p> <p>This thread might be interesting&nbsp;&nbsp;<a href="https://devzone.nordicsemi.com/f/nordic-q-a/122997/help-with-the-nrf21540-on-the-nrf5340_audio-project">https://devzone.nordicsemi.com/f/nordic-q-a/122997/help-with-the-nrf21540-on-the-nrf5340_audio-project</a>&nbsp;</p> <p>From my understanding you should check the following:</p> <p>- Only use GPIO mode, because SPI pins are in use by audio codec.</p> <p>- Also&nbsp;disable UARTE0 due to bullet point 6:&nbsp;<a href="https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/app_dev/device_guides/fem/fem_nrf21540_gpio_spi.html">https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/app_dev/device_guides/fem/fem_nrf21540_gpio_spi.html</a>&nbsp;</p> <p>Kenneth</p><div style="clear:both;"></div>