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Columba is an open-source project based on the Reticulum mesh network protocol, allowing messaging and voice calls over Bluetooth, WiFi, LoRa, etc., without requiring internet, base stations, or central servers, with end-to-end encryption.
This article demonstrates how to embed Yggdrasil Network as a library in Go applications, allowing for user-space IPv6 mesh networking without a daemon.
Meshtastic is an open-source project that uses inexpensive LoRa radios to create a decentralized, long-range off-grid mesh communication network, supporting encrypted text messaging and GPS features without requiring a phone or licensed radio operator.