Meshtastic is an open-source project using low cost LoRa radios as a long range off-grid communication platform in areas without little or no communications infrastructure. It’s a portmanteau of Mesh and “fantastic”.
I found it shared on Facebook, which lead me to the subreddit post, which lead me to reading more about it and even finding Lemmy communities and local groups!
https://mander.xyz/c/meshtastic
I also made sure to check if this wasn’t a hail corporate thing. And I also felt like I missed the era of homemade radios. So this is exciting for me!
meshtastic@mander.xyz is the largest, but there are a few. Just go to Communities, select “All”, and enter “meshtastic”.