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Audio and GPRS
The accuracy and detection distance can be adjusted using the onboard poteniometer
support for tablets
5 general purpose input can be connected to limit switch
Methane Gas Sensor MQ4 (Analog/Digital) arduino module Audio and GPRSMQ 4 Sensor is highly sensitive to Methane CH4. Using a MQ sensor and detecting the gas is quite easy. You can either use the digital pin or the analog pin to accomplish this. Simply power the module with 5V and you should notice the power LED on the module to glow and when no gas is detected the output LED will remain turned off meaning the digital output pin will be 0V. Features Power requirements: VCC 5V0. 1. Detection Gas: Natural gas Methane.
