https://devzone.nordicsemi.com/f/nordic-q-a/93701/nrf21540-driverHi, I&#39;m able to select the nRF21540_nRF52840DK board for my project and I&#39;m wondering how command the nRF21540 using the I/O pins and the SPI port. Do you have any examples? Thank you, Andyen-USTelligent Community 13Wed, 09 Nov 2022 11:50:37 GMThttps://devzone.nordicsemi.com/thread/394898?ContentTypeID=1Wed, 09 Nov 2022 11:50:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:177c144a-f3e3-46eb-ad3c-f4f222653a65Jared<p>Hi,</p> <p>Several of our examples such as the <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/bluetooth/peripheral_uart/README.html">BLE peripheral UART</a> example supports&nbsp;<a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/bluetooth/peripheral_uart/README.html#fem-support">adding </a>the FEM.</p> <p>If you&#39;re using BLE with the FEM then you should use the <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrfxlib/mpsl/README.html#mpsl">MPSL library</a>&nbsp;to configure the nRF21540. I couldn&#39;t find any examples that actually show you how to use the library but the documentation for the API can be found <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrfxlib/mpsl/doc/api.html">here</a>.</p> <p>I hope that helps,</p> <p>regards</p> <p>Jared&nbsp;</p><div style="clear:both;"></div>