{
  "specversion": "1.0",
  "type": "io.sensors.temperature.reading.v1",
  "source": "mqtt://broker.example.com/fleet-a/sensors/temp-0042",
  "subject": "fleet-a/sensors/temp-0042",
  "id": "5f8e1d6a-4c3b-4a2f-9c1d-8b7e6f5a4d3c",
  "time": "2026-05-22T14:10:42.512Z",
  "datacontenttype": "application/json",
  "data": {
    "sensorId": "temp-0042",
    "fleet": "fleet-a",
    "celsius": 22.4,
    "humidity": 41.7,
    "batteryPct": 84,
    "rssiDbm": -67,
    "qos": 1
  }
}