LPG Leakage Control Using SMS through SIM800L with MQ-2 Sensor and Stepper Motor Based on Arduino UNO

Currently LPG (Liquid Petroleun Gas) in the form of methane / butane widely used by society. So that kerosene that used to be often used has been abandoned by society and replaced by LPG. By using this LPG many benefits can be obtained by society. For instance LPG usage is much more efficient. But there are also shortcomings that we must consider when using this LPG is in terms of security. This is because the gas is flammable so it can cause a fire / explosion. Therefore the LPG leakage controller was designed using SMS via SIM800L with MQ-2 sensor and Arduino UNO stepper motor. This tool consists of several series of sensor circuit, an arduino UNO minimum system, stepper motor driver circuit, SIM800L circuit and alarm circuit. From the research results obtained, LPG leakage controller is able to detect leakage starting from the sensor output value 32 - 553.