The RAK7204 is an indoor environmental monitoring station and can measure changes in temperature, humidity, gas pressure and provide an indoor air quality index.
The gas sensor used in this IoT device is the Bosch Sensortec’s BME688 4-in-1 gas sensor with artificial intelligence (AI) and integrated high-linearity and high-accuracy pressure, humidity, and temperature sensors. It is specially developed for applications where size and low power consumption are critical requirements. The gas sensor can detect volatile organic compounds (VOCs), volatile sulphur compounds (VSCs), and other gases such as ethanol, alcohol, carbon monoxide and hydrogen in the parts per billion (ppb) range.
The ideal location for these sensors is in an indoor situation, and so the sensors were located across the City of Port Adelaide Enfield catchment at our Port Adelaide Parks and Greenacres Libraries.
The graphs below are an example of real data from air-quality sensors at each library. Over the past months, the average temperature is 21C, Humidity at 50%, and IAQ Index is below 40.