BLE Event Trigger - Keep HFCLOCK always onhttps://devzone.nordicsemi.com/f/nordic-q-a/111640/ble-event-trigger---keep-hfclock-always-onHello! i use a nRF52833 DK and the nrf connect sdk for developing Bluetooth LE applications. I use the Bluetooth Event Trigger extension to toggle GPIO pins with every BLE event as described here . In the nRF Desktop application ( here ), internal modulesen-USTelligent Community 13Wed, 29 May 2024 13:46:57 GMTRE: BLE Event Trigger - Keep HFCLOCK always onhttps://devzone.nordicsemi.com/thread/486481?ContentTypeID=1Wed, 29 May 2024 13:46:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:af93890c-881f-4e93-820c-3ac1399f5acdVidar Berg<p>Hello Daniel,</p> <p>Yes, you can use the onoff API to request the HF crystal oscillator as demonstrated here:&nbsp;<a href="https://github.com/nrfconnect/sdk-nrf/blob/e895510c7cad107d815070c02923e82564ed0337/samples/peripheral/radio_test/src/main.c#L15">https://github.com/nrfconnect/sdk-nrf/blob/e895510c7cad107d815070c02923e82564ed0337/samples/peripheral/radio_test/src/main.c#L15</a>.&nbsp;</p> <p>The crystal oscillator will not be stopped until&nbsp;all users have released their request.</p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>