Hi Meach,
Sorry for the delay reply. 1.The full range of the temperature sensor is 0~65 °. Can you test within this range? 2.BME688 sensor is some sensitive to temperature and humidity; 3.The sensor can test CO2 content in the air, not limited to human breath. 4. We cann't understand that the reference CO2 value has been maintained at 500 for a long time. Can you explain it? In the figure, are the reference CO2 and the CO2 output from BME688 measured at the same time?
... View more