https://devzone.nordicsemi.com/f/nordic-q-a/123796/bluetooth-le-nrf52840---switch-ble-advertising-intervalHi, I am developing a small app for the nRF52840 using the SDK V3.1.0 and the Visual studio Code on a PC windows 11. What I like to do is to be able with the app to change the BLE Advertising Interval by just pressing the buttons. I am not too familiaren-USTelligent Community 13Tue, 19 Aug 2025 15:09:37 GMThttps://devzone.nordicsemi.com/thread/546084?ContentTypeID=1Tue, 19 Aug 2025 15:09:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2a593932-d0ff-4305-8167-5f12dfb80757tesc<p>Hi,</p> <p>It looks like <a href="https://docs.nordicsemi.com/bundle/ncs-2.6.4/page/zephyr/connectivity/bluetooth/api/gap.html#c.bt_le_adv_start">bt_le_adv_start()</a> cannot be called from interrupt context, so that instead you should perform the actions of (stopping and) starting advertising in a <a href="https://docs.nordicsemi.com/bundle/ncs-latest/page/zephyr/kernel/services/threads/workqueue.html">workqueue thread</a>. See <a href="https://docs.nordicsemi.com/bundle/ncs-latest/page/zephyr/kernel/services/threads/workqueue.html#how_to_use_workqueues">How to Use Workqueues</a> for details.</p> <p>Regards,<br />Terje</p><div style="clear:both;"></div>