https://devzone.nordicsemi.com/f/nordic-q-a/123115/need-help-to-understand-last-will-topic-with-awsHi all, I&#39;m working with nrf9151 and aws iot core and mqtt, everything works well, but for now I&#39;d like to have for example a topic like `/topic/id_client/stauts` where I publish a retained message when my device is connected to the broker, anden-USTelligent Community 13Mon, 21 Jul 2025 12:28:42 GMThttps://devzone.nordicsemi.com/thread/543014?ContentTypeID=1Mon, 21 Jul 2025 12:28:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fb1c27d8-73ea-4946-8a7b-dca0a1977402dejans<p>Hi,<br /><br />For retainig the messages, you can look at retain flag in mqtt_publish() (in mqtt.c).<br />This&nbsp;<a href="https://devzone.nordicsemi.com/f/nordic-q-a/93986/nrf9160-mqtt-mqtt-c-last-will-and-testamenet">discussion</a> might be relevant for last will topic.<br /><br />Best regards,<br />Dejan</p><div style="clear:both;"></div>