I wish we had more / more easily accessible networks that let you do this. Something that would let you send extremely tiny (<1kB) packets, using a wireless pr

I wish we had more / more easily accessible networks that let you do this. Something that would let you send extremely tiny (<1kB) packets, using a wireless protocol that could be implemented extremely cheaply, piggybacking on the bandwidth of nearby internet-connected devices in a privacy-preserving way. Amazon has a network like this called Sidewalk, using Alexa devices as gateways, but I don't think it's very open to third-party experimentation, and it's definitely not an interoperable standard on the gateway side.