Chiyu DIO controller BF-1010 IO controller can not only control IO but also input CO2/temperature/humidity signal and make trigger upon them. Right on the screen, you can view the temperature, humidity, and air quality in real-time. Also, you can set the CO2 value, once the CO2 value is too high, it will send an alarm to the security department, and trigger one of the air conditioners CO2 rate is about to rise. Then, it will show a CO2 alarm. If you have related requirements, please feel free to contact Chiyu.