Heya!
That’s a good question! We did a lot of research way back when to try and pick the best protocol with the best security. We really liked COAP for being a W3C standard, and for its similarity to HTTP / other common internet protocols.
We’ve also found that most MQTT implementations these days tend to be insecure by default. From what I’ve seen, many of the secure 3rd party implementations for that protocol are also really memory and resource heavy, making it difficult to run them on many devices. It’s definitely something we could be open to if there were enough demand. I’d totally be open to some kind of MQTT client library that would let you push data to a 3rd party while using the primary secure connection to manage firmware and your device, etc, etc.
Thanks!
David