Yeah, if your needs are simple enough and your clients are small, MQTT is a good choice. Two or three XMPP servers even have built-in MQTT bridges for supportin

Yeah, if your needs are simple enough and your clients are small, MQTT is a good choice. Two or three XMPP servers even have built-in MQTT bridges for supporting very lightweight clients. From what I've seen, XMPP is used in IoT more for the federation aspect rather than as the "last mile" to the sensors/devices. Cases where you need interoperability and security across different sites/organizations. In any case, the Modern XMPP project (this article) currently only focuses on XMPP for the IM use-case.