iroh is a peer to peer networking technology so the project example of controlling a fan isn't so much about the fan but rather that it's controllable from anywhere through an esp32 microcontroller that can maintain a resilient connection endpoint even through power cycles and so on. I think iroh was posted about on HN a few weeks ago and I had a similar reaction of like...what in the world is this blog post even saying haha. But I found their docs page and found it pretty fascinating learning! https://docs.iroh.computer/what-is-iroh
Works on Android too when developing Dart applications and making use of flutter_rust_bridge though it's a bit of an involved setup to be honest.
I really hope more people will play around with iroh and build stuff especially because in the last year some things have been renamed in the API to be more clear and other stuff has been simplified e.g. see this blog post https://www.iroh.computer/blog/iroh-0-94-0-the-endpoint-take...