I’ve built a great extensible architecture with M5 and basically any sensor. It was mentioned in my reply
https://community.m5stack.com/post/29410
It’s one thing to capture some data, it’s another to do the same in a scalable collective user base. That requires a distributed collection and messaging environment. Sensing and Controlling are two major branches of that challenge.
So I think this community challenge needs to think bigger than a few M5 devices. 😄