Scott VE3QBZ on Nostr: I'm not super familiar with unlicensed spectrum, but at 900mhz, the ISM band is ...

I'm not super familiar with unlicensed spectrum, but at 900mhz, the ISM band is unlicensed and available, subject to pretty low power requirements. That's where LoRA and Meshtastic play a lot - there is a _ton_ of interest in Meshtastic in and outside of ham radio.