Carbon dioxide is released as a result of human activity and is able to concentrate in large quantities in rooms with poor ventilation and can affect human health. Poisoning with carbon dioxide manifests as chronic headaches, nausea, vomiting, dizziness and other unpleasant symptoms. To avoid these consequences you need automatic monitoring of carbon dioxide levels. This system checks the composition of the air, and in case of the slightest deviation includes an automatic ventilation system. A warning message will be sent if carbon dioxide level exceeds the allowable value. With the help of a mobile phone, you can easily control the composition of the air in a house or office. "Smart House" monitors the health of your household.