meshtastic – off grid long range coms


check out https://www.meshtastic.org/

buy these direct , and already loaded off ebay – or roll your own with and ESP32 off the shelf .

https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2334524.m570.l1313&_nkw=meshtastic&_sacat=0&LH_TitleDesc=0&_osacat=0&_odkw=meshatastic

communication without mobile coverage

the basic idea is you connect via bluetooth from an android phone app to the device and it communicates with the mesh network on a free band to other devices on the same channel – still a work in progress but looks amazingly promising for coms up to a few miles.

when using the gps modules they also give your location to other nodes allowing basic direction finding . great idea for remote hunting spots where cell phone coverage is bad.

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