https://devzone.nordicsemi.com/f/nordic-q-a/20631/hardfault-connection-parameter-updateHi, My NRF52832 runs into the hardfault handler when the sd_ble_gap_conn_param_update() function is called. I copied the BLE code from the ble_app_template_pca10 project. When I run the code in that project there is no problem, but now the codeen-USTelligent Community 13Tue, 21 Mar 2017 11:15:13 GMThttps://devzone.nordicsemi.com/thread/80424?ContentTypeID=1Tue, 21 Mar 2017 11:15:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:438ae2c7-6875-401f-b2bb-1dec27382615jroorda<p>Nevermind, I figured out that I accidently set the app_timer IRQ priority to HIGHEST! Now I changed it back to LOW it does not hardfault anymore. Thanks for pointing in the right direction! This case can be labeled as resolved.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/80423?ContentTypeID=1Tue, 21 Mar 2017 11:06:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bbff6ca7-032c-4dc6-93d7-10fa0dea54bcjroorda<p>I have nothing in my app running on APP_IRP_PRIORITY_HIGH. All the peripherals are configured at IRQ_PRIORITY 7 in sdk_config.h</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/80426?ContentTypeID=1Tue, 21 Mar 2017 10:41:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2be060e3-ee7f-4868-abbd-f9807cd91660FormerMember<p>Okay, I see. Is there anything in your app that is running on higher interrupt priority than the BLE events, do you have anything in your app that is running on the priority APP_IRQ_PRIORITY_HIGH? If so, could you change it to APP_IRQ_PRIORITY_LOW or APP_IRQ_PRIORITY_LOWEST?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/80425?ContentTypeID=1Tue, 21 Mar 2017 10:06:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3e6ebc4c-40a6-4e2b-ab4c-c6860366f5d6jroorda<p>It does not return an error code, the MCU runs into a hardfault in the sd_ble_gap_conn_param_update() function. It never returns from that function...</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/80422?ContentTypeID=1Tue, 21 Mar 2017 10:01:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:13aab501-04dc-4d1e-b712-6f9235338617FormerMember<p>Which error code does sd_ble_gap_conn_param_update() return?</p><div style="clear:both;"></div>