Will spending too much time in Interrupt level 2 and 3 cause disconnects.https://devzone.nordicsemi.com/f/nordic-q-a/44911/will-spending-too-much-time-in-interrupt-level-2-and-3-cause-disconnectsWe have an application running on our devices that are using ble_nus to communicate with a base station. The use case is approximately something like this: On button presses small data packages (less than 5 bytes) are send via ble_nus. The resten-USTelligent Community 13Mon, 18 Mar 2019 08:53:03 GMTRE: Will spending too much time in Interrupt level 2 and 3 cause disconnects.https://devzone.nordicsemi.com/thread/176628?ContentTypeID=1Mon, 18 Mar 2019 08:53:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fdb81ddc-50f4-46c6-ae24-fca648757e47Sigurd<p>Hi,</p> [quote userid="4847" url="~/f/nordic-q-a/44911/will-spending-too-much-time-in-interrupt-level-2-and-3-cause-disconnects"]On button presses small data packages (less than 5 bytes) are send via ble_nus.[/quote] <p>Are you calling&nbsp;ble_nus_data_send() in the&nbsp;interrupt handler with level 2/3 ? If you do that, you will hardfault.</p><div style="clear:both;"></div>