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Designed BLE sensors and WiFi and LoRa gateways based on Nordic nRF51822 BLE modules and HopeRF’s RFM95W LoRa radios.  All wireless data presented as MQTT messages to a central broker, with integration into InfluxDB and Grafana for dashboards.  Features include

  • Distributed WiFi and LoRa gateway architecture
  • BLE-LoRa bridging
  • BLE beacon replay/spoof detection
  • Geolocation of BLE beacons in both WiFi and LoRa architecture
  • small form factor sensor design for years of battery life on coin cell batteries
  • Fun development process by using ARM mBED to manage complexity
  • Low cost, accessible project
  • Many practical sensor examples

Full project write-up is here.