Application of Sensors in Arduino as a control in Smart Home

The application of sensors in smart homes using Arduino to control equipment such as lights, fans, alarms, and so on. Sensors used in Arduino include LDR, Ultrasonic, DHT11, and MQ2. LDR is used to automatically control railing lights, balcony lights, garden lights, and backyard lights if, during the day, the lights will turn off and on at night. Ultrasonic sensors are used to open the gate. The rolling door is driven by a DC motor, while a servo motor drives the house door. Testing on the ultrasonic sensor can open the gate and roll when the ultrasonic sensor reads objects with a distance of 5–25 cm. Testing on this sensor is done by utilizing heat from a match that is placed ± 10 cm from the sensor with a time of 5–25 seconds to turn on the fan when the temperature is above 30°C. The MQ2 sensor is used to detect gas leaks and will turn on the blower. This test was carried out 50 times resulting in 4 wrong times so that the system as a whole has an accuracy of 92% and an error of 8%.