sensor_data = {
    "sensor_001": [{"temp": 16.1}, {"temp": 15.2}],
    "sensor_002": [{"temp": 25.1}, {"temp": 27.1}],
    "sensor_003": [{"temp": 19.3}, {"temp": 20.5}],
    "sensor_004": [{"temp": 30.9}, {"temp": 27.5}]
}
