Provide MQTT as alternative networking

[declension]

It's a total re-think, but MQTT was one of the original options for solving this, along with long-lived websockets etc. Raising this to track ideas as it's suddenly more important to me :smile:

Pros

• Can get most firewalls
• Much less configuration needed
• Allows people on Carrier-Grade NAT (me now!) e.g. 3G / 4G connections to have a chance of networking
• Could work for those with IPv6 issues too perhaps.
• AWS support has improved loads

Cons

• Slower / more latency for sure. But maybe not too bad at all after some testing...
• More work / hassle for how much gain?
• A long-running custom process would be needed, on a server, rather than a battle-tested thing like stunnel or Nginx...
• This means binary compilation perhaps, package management across different platforms (Linux, Synology, etc)
• More decisions for users to have to think about
• How would you manage 2-way communication as LMS CLI uses a fair bit.
• Transport layer serialisation (JSON?) needed, maybe. Or maybe not...

[frelev]

Sounds interesting, I have MQTT up and running (local broker) if you need something to be tested

[declension]

Thanks. It needs to be the AWS one really - anything local is just different networking hassle (and doesn't solve my use case), and anything cloud but not AWS is workable, just too much hassle / cost.

Also, I managed to get CLI tests working fairly easily. Won't have any time to play with this for a while but the concept seems good