Arduino Code And Video For HC-SR04 Ultrasonic Distance Sensor

Arduino code and video for HC-SR04 Ultrasonic Distance Sensor

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This is the Arduino code for HC-SR04 Ultrasonic Distance Sensor

This video shows you how to use HC-SR04 Ultrasonic Distance Sensor for arduino. http://robojax.com/learn/arduino/

1. HC-SR04 Ultrasonic Library (from Robojax.com)
2. HC-SR04 Ultrasonic Library from Arduino official website

/* * This is the Arduino code for HC-SR04 Ultrasonic Distance Sensor * to measure the distance using arduino for robotoic car and other applications * Watch the video https://youtu.be/QI9541YQq7M * * * Written by Ahmad Shamshiri for Robojax Video * Date: Dec 21, 2017, in Ajax, Ontario, Canada * Permission granted to share this code given that this * note is kept with the code. * Disclaimer: this code is "AS IS" and for educational purpose only. * */ /* Original Code // https://playground.arduino.cc/Code/NewPing * Modified for Robojax video on Dec 21, 2017 */ // --------------------------------------------------------------------------- // Example NewPing library sketch that does a ping about 20 times per second. // --------------------------------------------------------------------------- #include <NewPing.h> #define TRIGGER_PIN 12 // Arduino pin tied to trigger pin on the ultrasonic sensor. #define ECHO_PIN 11 // Arduino pin tied to echo pin on the ultrasonic sensor. #define MAX_DISTANCE 200 // Maximum distance we want to ping for (in centimeters). Maximum sensor distance is rated at 400-500cm. NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE); // NewPing setup of pins and maximum distance. void setup() { Serial.begin(115200); // Open serial monitor at 115200 baud to see ping results. } void loop() { delay(50); // Wait 50ms between pings (about 20 pings/sec). 29ms should be the shortest delay between pings. Serial.print("Ping: "); Serial.print(sonar.ping_cm()); // Send ping, get distance in cm and print result (0 = outside set distance range) Serial.println("cm"); int distance = sonar.ping_cm();// store the distance value in "distance" variable if(distance <=12){ // if distance is less than 12, do somethings. For example here just print "very close" Serial.println("Very close"); } }