The carbon dioxide concentration detection using mobile phones combine bluetooth and QR code

In recent years, indoor air quality is being a serious problem. The elevated levels of carbon dioxide make dramatic changes of climate. Global climate is suffering from environmental crises. High concentrations of carbon dioxide levels will have a bad effect on the environment and human may cause hypoxia, numb hands and feet, lose consciousness or even death. In this paper, we will set up a system to monitor the ambient air quality at indoor applications which using carbon dioxide detectors to combine mobile devices and networks to detect air quality. Users can get information by using a mobile phone or computer to read QR code or mobile communication confirm whether the places are safe and comfortable environments. The primary experiments proved that the system can be used to monitor the indoor air quality and temperature effectively.