HC-SR04

Arduino Uno | Measuring Distance with HC-SR04 Ultrasonic Sensor

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Arduino Uno | Measuring Distance with HC-SR04 Ultrasonic Sensor

Example Effect Press the serial monitor, and you can see that the measured distance is 9.8cm-10.1cm with an error of about 0.2cm. HC-SR04 An ultrasonic sensor used for distance measurement, widely applied in robotics to avoid obstacles and measure distances. Its module uses Trig to trigger distance measurement, which emits 8 40kHz square waves and … Read more