Example Code for Arduino-TRIG Pulse-triggered Mode

Hardware Preparation

• Name: Arduino Leonardo, Model/SKU: , Quantity: 1, Purchase Link: https://www.dfrobot.com/product-832.html
• Name: USB Data Cable, Model/SKU: , Quantity: 1, Purchase Link:

Software Preparation

• Development tools: Arduino IDE

Wiring Diagram

Other Preparation Work

• Ensure the sensor is in I2C mode and passive ranging mode(I2C Config register bit 2=1) before using.

Sample Code

/*!
       This example is the ultrasonic distance measurement of the module.

       Copyright   [DFRobot](http://www.dfrobot.com), 2020
       Copyright   GNU Lesser General Public License

       version  V1.0
       date  21/08/2020
*/
#define    VELOCITY_TEMP(temp)       ( ( 331.5 + 0.6 * (float)( temp ) ) * 100 / 1000000.0 ) // The ultrasonic velocity (cm/us) compensated by temperature

int16_t trigPin = 5;
int16_t echoPin = 6;
uint16_t distance;
uint32_t pulseWidthUs;
void setup() {
  Serial.begin(9600);
  pinMode(trigPin,OUTPUT);
  digitalWrite(trigPin,LOW);
  pinMode(echoPin,INPUT);
  delay(100);
}
void loop() {
  int16_t  dist, temp;
  digitalWrite(trigPin,HIGH);//Set the tirgPin High
  delayMicroseconds(50);     //Delay of 50 microseconds
  digitalWrite(trigPin,LOW); //Set the tirgPin Low

  pulseWidthUs = pulseIn(echoPin,HIGH);//Measure echo high level time, the output high level time represents the ultrasonic flight time (unit: us)
  distance = pulseWidthUs * VELOCITY_TEMP(33) / 2.0;//The distance can be calculated according to the flight time of ultrasonic wave,/
                                                    //and the ultrasonic sound speed can be compensated according to the actual ambient temperature
  Serial.print(distance, DEC);
  Serial.println("cm");
  delay(100);
}

Result

Additional Information

• Timing Diagram