https://devzone.nordicsemi.com/f/nordic-q-a/39951/gap-ble-event-reentering-re-entrant-functionHI. I use BLE in observer role. I register event handler only ones in initialization: NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL); Is the event handler ble_evt_handler reentrant (Reentering )function? Thanksen-USTelligent Community 13Tue, 30 Oct 2018 10:30:05 GMThttps://devzone.nordicsemi.com/thread/155067?ContentTypeID=1Tue, 30 Oct 2018 10:30:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dc1b209b-4a2b-4367-b035-160e66438532AndreasF<p>Hi.</p> <p>The <strong>ble_evt_handler</strong> event handler is called in the SWI2_IRQHandler and it is always reentrant. </p> <p>The <strong>ble_evt_handler </strong>has not the highest interrupt priority level, more about interrupt priority levels <a href="http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.s132.sds%2Fdita%2Fsoftdevices%2Fs130%2Fprocessor_avail_interrupt_latency%2Fexception_mgmt_sd.html">here</a>.</p> <p>It is not using any global variables.</p> <p>- Andreas</p> <p></p><div style="clear:both;"></div>