Real-time updates with Meshtastic — how do they work?

Mesh Network Architecture

Meshtastic devices use the LoRaWAN protocol to communicate with each other, forming a mesh network that adapts to changing signal conditions. Each device acts as a repeater, retransmitting messages from other devices to ensure reliable data transmission. For example, in a network of 10 devices, each device can potentially act as a repeater for up to 5 other devices, extending the network’s coverage.

Device Configuration and Data Transmission

To facilitate real-time updates, Meshtastic devices must be configured to operate in mesh mode. This involves setting the device’s routing table to enable message relay between devices. When a device sends a message, it will be transmitted to nearby devices, which will then retransmit it to other devices in the network, effectively creating a network-wide broadcast. To minimize latency, Meshtastic devices use a technique called “acknowledgement” to confirm receipt of messages, ensuring that data is delivered promptly. With proper configuration, data can be transmitted at speeds of up to 27 kbps over long distances, making Meshtastic suitable for applications requiring real-time updates.