Outdoor LoRaWAN Door Sensor with Open-Count Statistics

An outdoor open/close sensor for doors, gates, hatches and cabinets exposed to the weather. It reports every change of state over LoRaWAN, raises an alarm when a door is left open, and keeps running statistics of how often each door is opened. A built-in datalog stores events when the network is unavailable and sends them once coverage returns, so no access record is lost. NARA uses the data for perimeter security, utility cabinets, pump stations, cold rooms and remote sites where wiring an alarm system is impractical.