There’s nothing stopping us from using a standard MQTT library to connect the device. You can see my struggles here. I’m able to get a Particle to connect to a local MQTT server but I have not turned on authentication yet. If I had to guess, it doesn’t connect to Cayenne because the username/password is longer that the max specs of MQTT and the MQTT library is truncating it which obviously would fail authentication. I’ll work with it over the next few days to see what I can accomplish.
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