Meshtastic is an open-source project that enables the creation of a decentralized, license-free wireless network for long-distance communication. It uses LoRa (Long Range) radio modules to send messages between devices without requiring an internet or cellular connection.

Main features of Meshtastic:

• Mesh network: Messages are forwarded from device to device to increase range.
• License-free: Uses license-free frequency bands (e.g. 868 MHz in Europe or 915 MHz in the USA).
• Long range: Depending on the environment and antenna, several kilometers can be covered.
• Low power consumption: Devices can run for days or even weeks on a single battery charge.
• Smartphone integration: Connection via Bluetooth with an app (Android & iOS) for easy operation.
• Encryption: Messages can be encrypted to protect privacy.
• Open source: Hardware and software are open source and can be customized.

Possible uses:

• Outdoor adventures & emergency communications (hiking, camping, disaster relief)
• Communication in remote areas without a mobile network
• Protests or crisis areas for independent communication
• IoT applications (e.g. sensor data transmission)

Meshtastic is often used with devices like the LILYGO T-Echo or Heltec LoRa ESP32 .