[TeMPOraL]

> A multi-protocol solution is sorely needed. One that combines mesh networking, internet, QR, audio encoding, even USB dead drops (https://deaddrops.com/).

Add APRS and regular ham radio.

I'm only half-joking, it would be pretty cool to have something like that! :).

[duskwuff]

I've heard some really interesting things about the LoRa packet radio protocol. Runs in ISM bands (433/868/915 MHz), low-power, excellent range (2 km urban, 20+ km LOS).