MeshCom 433 MHz is a low-power, long-range wireless communication system that operates in the 433 MHz band. It uses mesh networking, meaning each device (node) can relay messages for others, extending coverage without relying on a central infrastructure. This makes it useful in situations where internet or cellular networks are unavailable, such as outdoor adventures or emergency scenarios. The technology typically relies on LoRa (Long Range) modulation, which allows data to travel several kilometers while using very little energy. Devices in a MeshCom network can automatically find and maintain connections with nearby nodes, adapting dynamically as nodes move or drop out. Overall, MeshCom 433 MHz is valued for its resilience, low power consumption, and ability to create decentralized communication networks.

Last week I setup a small MesCom Node, consisting of a Heltec LoRa 32 Module (200mW output), based on ESP32 technology. A 5/8-Lambda omnidirectional antenna, 10W Solar panel, a Waveshare Solar Power Management Module and 4x 18650 (3.7V / abt. 15 Ah) battery. The battery capacity will be sufficient for safe operation even on gloomy winter days.

Further information can be found here (MesCom Map) or here (Institute of Citizen Science).