Question about last will topic aws mqtthttps://devzone.nordicsemi.com/f/nordic-q-a/125530/question-about-last-will-topic-aws-mqttHi all, I&#39;m using aws iot lib and last will topic feature, everuthing works but I have a question, in prj.conf I set my topic with Is it possible to build this last will topic at runtime? For example if I want to deploy fota update, I don&#39;t wanten-USTelligent Community 13Tue, 11 Nov 2025 14:35:54 GMTRE: Question about last will topic aws mqtthttps://devzone.nordicsemi.com/thread/553994?ContentTypeID=1Tue, 11 Nov 2025 14:35:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7e0b3c77-5cf1-47b6-8881-dfe5b319bc0fHieu<p>Hi simon884,</p> <p>Refer to the implementation of the library here:</p> <p><a href="https://github.com/nrfconnect/sdk-nrf/blob/v3.1.0/subsys/net/lib/mqtt_helper/mqtt_helper.c#L470-L484">https://github.com/nrfconnect/sdk-nrf/blob/v3.1.0/subsys/net/lib/mqtt_helper/mqtt_helper.c#L470-L484</a></p> <p>It doesn&#39;t seem like the library support changing the topic in runtime out of the box. However, it also looks like you could modify the library and add your own API to do that.</p> <p>Hieu</p><div style="clear:both;"></div>