freemesh for wifi AP based mesh networks. not as convenient as briar, but considering the situation having multiple modes of communication seems like a good hedge.
https://freemeshwireless.com/
also, if you can get a hold of lora wan based devices, e.g. esp32 w/ lorawan, you can set up a lorawan based mesh network with wifi entry points.
freemesh for wifi AP based mesh networks. not as convenient as briar, but considering the situation having multiple modes of communication seems like a good hedge.
also, if you can get a hold of lora wan based devices, e.g. esp32 w/ lorawan, you can set up a lorawan based mesh network with wifi entry points.