Contact me with LoRa via the Meshtastic network
Meshtastic (and Meshcore) are distributed mesh networking projects that use LoRa (Long Range) radio to create a decentralized communication network. They work as well as you might expect from a $10-$30 device - height and antenna placement are only half the equation. You also need someone on the other end.
I used to list connection information on this page, but that never was going to be useful. Instead, I'll point you to btownmesh.org. Follow those instructions in my locale and I *might* be able to hear you. If you can get out to the larger mesh, there are others who can relay messages to me on Signal.