Ultrasonic Sensor

Ultrasonic sensor test. It works. Nice.

Ultrasonic sensor module is HC-SR04. I purchased this from virtuabotix.com. The company provides a Ultrasonic library.

  • Go to https://www.virtuabotix.com/feed/?page_id=1587 and find the Ultrasonic section.
  • Download the library.
  • Unzip it and copy the unzipped folder to your Arduino libraries folder.
  • You may restart Arduino to let it recognize the new library.
  • Use an example code for your starting step.

Here is the example.

#include <Ultrasonic.h>
#define TRIGGER_PIN 12
#define ECHO_PIN 13
Ultrasonic ultrasonic(TRIGGER_PIN, ECHO_PIN);
void setup()
void loop()
  float cmMsec, inMsec;
  long microsec = ultrasonic.timing();
  cmMsec = ultrasonic.convert(microsec, Ultrasonic::CM);
  inMsec = ultrasonic.convert(microsec, Ultrasonic::IN);
  //Serial.print("MS: ");
  Serial.print(", ");
  //Serial.print(", CM: ");
  Serial.print(", ");
  //Serial.print(", IN: ");

Just wire pins as the source code says. Then open the Serial Monitor from Arduino. You will see he raw milliseconds and distance in centimeter and inch.

That’s it.


One thought on “Ultrasonic Sensor

  1. Pingback: Wireless Remote Sensor | J Kwon

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