I love playing with digital radio communications. The ability to send data over long distances without any infrastructure or service providers in the middle is such a liberating concept. I’ve done a lot with amateur radio on the channel over the last few years, but lately I’ve been playing with cheap low powered LoRA based devices that don’t require a license.
In my latest video, I take a look at Meshcore, a technology that allows volunteers to build out robust off-grid networks.
Meshcore is similar to Meshtastic, but in my opinion is better suited for long distance communications. My Meshtastic experience in Connecticut has frequently been limited by the lack of nearby users and unreliable message delivery. While I have successfully made contacts from airplanes, ground-level communication has remained a challenge.
The transition to Meshcore revealed a more active community and improved performance within my region. Unlike Meshtastic, which utilizes a managed flood network where every node acts as a repeater, Meshcore requires users to assign specific roles to their devices. A device can be configured as a companion, which serves as a personal radio interface for a phone, or as a dedicated repeater. By separating these roles, the network can route messages through established paths rather than retransmitting every signal from every device. This deterministic approach reduces network congestion and allows for longer-distance communication through strategically placed repeater stations.
During my testing, I successfully sent text packets to Enfield and Vernon, Connecticut—locations over 50 miles away that would take more than an hour to reach by car. These transmissions occurred without the use of the internet or requiring a radio license, as the devices operate on the license-free 900 MHz spectrum.
Setting up these devices is a relatively accessible process. Hardware like the Heltec V3 can be purchased super cheap, while fully assembled units like the ThinkNode M5 cost around $54 (compensated affiliate links). Most Meshtastic devices can be re-flashed with Meshcore firmware.
The Meshcore project website provides a web-based flasher to install the firmware, allowing users to choose between companion, repeater, or room server modes. The room server function is particularly notable, acting as a simplified bulletin board system that stores messages for users to read when they later connect their radios.
The current landscape of the network in Connecticut shows a growing infrastructure of repeater stations, with expansion moving toward neighboring states. While it’s strictly for text messaging—no voice or video—there is something really neat about building a communication network that runs entirely on solar power and off-grid hardware.
For those who have found Meshtastic quiet or unreliable, this alternative protocol offers a different architectural approach using the same hardware. I will be watching to see how the interconnection of these regional nodes continues to develop.