Quantity   Component name
1 × MQ7 module measures concentration of carbon monoxide (CO)
1 × MQ131 module measures concentration of ozone (O3)
1 × MQ135 module measures concentration of benzene (C6H6)
1 × MQ136 module measures concentration of hydrogen sulfide (H2S)
1 × MG811 module measures concentration of carbon dioxide (CO2)
1 × Grove Dust Sensor (PPD42) measures particulate matter concetration
1 × Arduino Uno
1 × ESP8266 Serial Wifi Module
1 × DFRobot Power Shield Sensors need a lot of power, and this shield provides it
1 × DC-DC Boost Converter Step-Up Power Module Output 5V-35V
1 × LiIon battery 3.7V 4.4Ah Minimum!
1 × Bunch of wires:) At the moment we have them connected to a small protoboard, its a mess really.