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Off-grid mesh networking for emergency communications using LoRa technology
Meshtastic is a project that enables you to use inexpensive LoRa radios as a long-range, off-grid communicator for areas without reliable cellular service. Alexandria ARES is exploring Meshtastic as a supplemental communications technology for austere environments.
Meshtastic uses low-power LoRa (Long Range) radios to create a mesh network that can operate independently of existing infrastructure. Messages are relayed from node to node, extending range beyond what a single radio could achieve.
The map below shows active Meshtastic nodes in the Alexandria region and surrounding areas. Coverage and node availability may vary based on node operators and local conditions.
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Map data provided by external sources. Node locations and availability are maintained by individual node operators and may change without notice.
Meshtastic can supplement traditional amateur radio communications in several scenarios:
When operating in areas without repeater coverage or infrastructure, Meshtastic can provide local communications between team members.
As a secondary communications path when primary systems are unavailable or overloaded.
Connecting remote sensors, weather stations, or monitoring equipment in locations without other connectivity options.
GPS-enabled nodes can share locations for situational awareness and resource tracking during operations.
Compatible devices include:
Most devices cost between $25-50 and are available from online retailers.
Meshtastic operates on ISM (Industrial, Scientific, and Medical) bands and does not require an amateur radio license in most jurisdictions. However, amateur radio communicators can enhance Meshtastic networks by:
Information about Alexandria ARES Meshtastic nodes and how to connect to the local network will be posted here as our deployment develops.
Meshtastic devices operating on ISM bands in the United States are subject to FCC Part 15 regulations. Maximum transmit power is limited to 1 watt EIRP on 902-928 MHz. Higher power operation requires amateur radio licensing and operation on amateur radio frequencies.
As Meshtastic technology matures and becomes more widely adopted, Alexandria ARES continues to evaluate its role in our emergency communications toolkit. We are particularly interested in: