DHT22 Humidity and Temperature Sensor: Used to measure the humidity and temperature of the environment. Bluetooth Module (HC-05): Used for wireless communication with another device, such as a mobile ...
int mq2SensorPin = A0; // Analog pin for MQ2 sensor connected to A0 of Arduino int buzzerPin = 8; // Pin connected to the buzzer int ledPin = 10; // Pin connected to the LED int servoPin = 9; // Pin ...
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