Nice! I imagine something like this could also be done with something more minimal, but still Linux-based and WiFi-capable, like the coin-sized VOCORE.
Neat project. I love the crustacean in text art, too.
EDIT: A port of TockOS to Raspberry Pi might be interesting for these use cases. Alternatively, a port of an existing, tiny OS on Rasp Pi to Rust using techniques from TockOS.