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Module pin definition as shown:
which means you can control it from a 3
the output of the module status: normally open (NO)
FCC CERTIFIED WI-FI module(Coming soon)
Sensors can be put on the finger or earlobe
MQ2 Combustible Gas Sensor distance Module pin definition as shown:Combustible Gas Sensor MQ 2 is a flammable gas and smoke sensor detects the concentrations of combustible gas in the air and outputs its reading as an analog voltage. The sensor can measure concentrations of flammable gas of 300 to 10,000 ppm. They are used in gas leakage detecting equipment in family and industry, are suitable for detecting LPG, i butane, propane, methane, alcohol, Hydrogen, smoke. The MQ 2 gas sensor is sensitive to LPG, i butane,
