https://devzone.nordicsemi.com/f/nordic-q-a/59104/nrf52840-crashes-when-changing-manufacturer-data-from-saadc-handler-callbackHi everyone, I am using an nRF52840 dongle (MakerDiary) with SDK15.0 &amp; SoftDevice S140 v6.0.0, and trying to change the BLE advertising manufacturer&#39;s data with the information from the SAADC reading. I wrote a small function &quot; set_mfg_data() &quot; thaten-USTelligent Community 13Sun, 15 Mar 2020 04:54:07 GMThttps://devzone.nordicsemi.com/thread/239839?ContentTypeID=1Sun, 15 Mar 2020 04:54:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8235ee58-42d7-4225-8b7e-90595e1f2342aeozyalcin<p>I actually figured it out. I was calling a different function that changes advertising interval right after kicking off the SAADC conversion. So I think what was happenning was that there was a race condition, and the SAADC was finishing the conversion, and calling my &quot;<span>set_mfg_data()&quot; function at the same time as when the other function changing advertising interval was running, and this was most likely causing the crash. Both functions interact with the SoftDevice, and I am pretty sure this is what was causing the crash. I hope this helps others!</span></p><div style="clear:both;"></div>