Hi @kelltob, welcome to the Cayenne Community.
See this post that I made earlier today – I ran into this same issue on one of my Pi’s, as did another user. That should explain whats going on (the version of paho-mqtt on the Pi isn’t compatible with our example code), and how to resolve it until we update the code such that it works with both versions (or at least the newest one).
Let me know if you have any questions about that post, or trouble with the steps within.