GroupAlarm MESH – Decentralized Communication Network
Fail-safe alerting and crisis communication via LoRa radio – completely independent of power grid, mobile network, and internet.
Maximum Reliability in Case of Blackouts & Infrastructure Failure
The failure of critical infrastructures – whether due to widespread power outages, cyber attacks, severe weather events, or disrupted mobile networks – requires a reliable fallback level.
How the MESH Network Works
GroupAlarm MESH uses the proven Meshtastic protocol and LoRa radio technology to automatically build a decentralized peer-to-peer network. It ensures that alarms, status messages, and short messages reliably reach their destination even if central providers or internet connections completely fail.
Self-Organizing & Dynamic
Every device in the network acts as a full node and automatically functions as a relay station (repeater). If the direct path is blocked, neighboring nodes forward the message ('hop') to dynamically increase the range.
Self-Healing Network
If a relay station fails, the protocol automatically finds an alternative route in the network to guarantee delivery.
Highest Data Security
All transmitted data – from emergency alarms and text messages to acknowledgments – is protected by end-to-end AES-256-bit encryption.
Role Concept in the Operational Area
For seamless radio coverage, the system combines stationary and mobile units:
Stationary Repeaters
Are mounted in exposed locations (e.g., on fire stations, town halls, masts, or high-rise buildings) to maximize coverage throughout the entire city or municipality.
Mobile Nodes
Installed in emergency vehicles or carried directly by emergency personnel to dynamically densify network coverage directly at the scene.
Integration of the GroupAlarm Box
As a stationary receiver, the GroupAlarm Box serves as a direct interface to the mesh network and reliably triggers alarms even without external connection.
Network Planning & Legal Compliance
A stable MESH network requires precise radio field planning. We support you from simulation to commissioning:
Measurement & Simulation
Precise range calculation using MESHTASTIC Site Planner for optimal repeater site selection.
Frequency & Regulation
Operation takes place in the license-free ISM/SRD band or optionally on private frequencies.
BNetzA Compliance
The system meets all requirements of the German Federal Network Agency (BNetzA) as well as international authorities and guarantees strict adherence to the prescribed duty cycle (transmission time limitation).