Sensors
A sensor detects physical quantities and converts them to electrical signals.
Types of SensorsSensorModelMeasuresTemperatureLM35, DHT11TemperatureHumidityDHT11, DHT22Humidity + TempMotionPIR SensorMovementLightLDRLight intensityDistanceHC-SR04Distance (ultrasonic)GasMQ-2Smoke/LPGActuators
An actuator converts electrical signals into physical action.