Serial LTE Modem MQTT event #XMQTTEVT result codeshttps://test-devzone.nordicsemi.com/f/nordic-q-a/88847/serial-lte-modem-mqtt-event-xmqttevt-result-codesHi there, We are using the Serial LTE Modem MQTT client . So when the #XMQTTEVT messages comes in, the first parameter &lt;evt_type&gt;, is documented well here: However, the second parameter &lt;result&gt; is not documented very well: Is it documenteden-USTelligent Community 13 Non-ProductionTue, 14 Jun 2022 11:41:16 GMTRE: Serial LTE Modem MQTT event #XMQTTEVT result codeshttps://test-devzone.nordicsemi.com/thread/372363?ContentTypeID=1Tue, 14 Jun 2022 11:41:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0e11e745-d7ec-44a0-9d94-d504a334560duser73166<p>Hello,</p> [quote user=""]<p><span>Is it documented somewhere which negative value corresponds to what reason?</span></p> <p><span>For example, what would it mean if we get a message in like (or any negative value really):</span></p>[/quote] <p>I don&#39;t think there is anything in the documentation how to treat different error codes, but you can look at the <a href="https://github.com/eblot/newlib/blob/master/newlib/libc/include/sys/errno.h">errno.h file</a> to get an idea maybe.</p><div style="clear:both;"></div>