🔧 Components: MQ9 gas sensor, Arduino UNO, I2C LCD, buzzer, red LED, and basic circuit components. 📟 Function: The system detects gas concentration and triggers alerts via buzzer, red LED, and ...

In this state the sensor reads the sensor value, it then looks at the two previous sensor values If the average of those three values are above the threshold value, it will go to the next state. It ...