https://devzone.nordicsemi.com/f/nordic-q-a/58737/how-to-solve-mqtt_disconnect-error--57Window10 nrf tag: 1.2.0 SES v4.4.2a I&#39;m attempting to code a one-shot mqtt function, but it fails in v1.2.0 whiile it succeeded in v1.1.0. I coded the below main.c by modifying mqtt_simple a bit. I don&#39;t touch other files but main.c A mqtt_disconecten-USTelligent Community 13Sat, 07 Mar 2020 10:57:10 GMThttps://devzone.nordicsemi.com/thread/238634?ContentTypeID=1Sat, 07 Mar 2020 10:57:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7ef3ee89-51f0-43e1-a2b4-4e769293405bYusuke<p>what a shame. you are right. Thanks you!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/238304?ContentTypeID=1Thu, 05 Mar 2020 13:15:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:462d7646-0757-4c2e-ade2-63a5b13fce17H&#229;kon Alseth<p>Hi,</p> <p>&nbsp;</p> <p>It looks like you&#39;re not waiting for the callbacks (MQTT_EVT_CONNACK etc), so it would not be connected yet.</p> <p>Try waiting for the connection to successfully complete (ie: the corresponding CONNACK + subscribe ACK in your mqtt_evt_handler).</p> <p>&nbsp;</p> <p>Kind regards,</p> <p>Håkon</p><div style="clear:both;"></div>