Are there limitations on the number of devices in a Meshtastic network?

Network Capacity

Meshtastic networks utilize the LoRaWAN protocol, which operates on a half-duplex mode, meaning that devices can either transmit or receive data, but not both at the same time. This protocol allows for a maximum of 256 devices on a single channel, with a maximum transmission rate of 250 kbps. However, it’s essential to note that not all devices are created equal; some devices may have better performance due to their higher sensitivity or better modulation schemes. To optimize network capacity, Meshtastic networks often employ a ‘star of stars’ topology, where multiple gateways are connected to a central hub, increasing the overall network capacity.

Channel Selection

When it comes to selecting channels, Meshtastic networks typically operate on the 868 MHz or 915 MHz frequency band, depending on the region. Each channel has a specific bandwidth and data rate, which affects the overall capacity of the network. For instance, the 868 MHz band has a bandwidth of 125 kHz, while the 915 MHz band has a bandwidth of 500 kHz. The choice of channel and bandwidth depends on the specific use case and the available spectrum in the region.

Network Configuration

To optimize the performance of a Meshtastic network, it’s essential to configure the devices correctly. This includes setting the transmit power, data rate, and spreading factor, which affects the network’s capacity and range. A spreading factor of 12, for example, provides a longer range but reduces the network’s capacity, while a spreading factor of 7 offers better capacity but reduces the range. By experimenting with different configurations, network administrators can optimize the performance of their Meshtastic network to support the maximum number of devices.