https://devzone.nordicsemi.com/f/nordic-q-a/73463/use-nrf21540-with-nrf52832Hi, I use library NRF21540.c to config to control NRF21540, to amplifier the radio of nrf52832. This is my define: #ifndef NRF21540_USE_GPIO_MANAGEMENT #define NRF21540_USE_GPIO_MANAGEMENT 1 #endif #define NRF21540_ANTSEL_PIN 26 #define NRF21540_MODE_PINen-USTelligent Community 13Tue, 06 Apr 2021 13:45:57 GMThttps://devzone.nordicsemi.com/thread/303199?ContentTypeID=1Tue, 06 Apr 2021 13:45:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6b05eab7-8333-4764-8e32-a5c6aeaf92a1Einar Thorsrud<p>Hi. I would need to see more of your code to debug. However, please note my reply <a href="https://devzone.nordicsemi.com/f/nordic-q-a/73610/nrf21540-and-ble/303197#303197">here</a>.</p><div style="clear:both;"></div>