### Project 11 Ultrasonic Distance Measurement

**1.Introduction**

In this project, we use graphical programming to measure the distance between ultrasonic module and front obstacle and display it on serial monitor.

**2.Materials Required**

1. KEYESTUDIO UNO Control Board *1
2. V5 Sensor Shield*1
3. Ultrasonic Module*1
4. Female to Female Dupont Line*4

**3.Connection Diagram**

Let’s start experiment, and connect ultrasonic waves to ARDUINO referring to the following figure.

![](media/wps6.jpg)

![](media/wps7.png)

![](media/wps8.png)

**4.Sample Code**

```c
int _ABVAR_1_t1 = 0 ;
int ardublockUltrasonicSensorCodeAutoGeneratedReturnCM(int trigPin, int echoPin)
{
  long duration;
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(20);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  duration = duration / 59;
  if ((duration < 2) || (duration > 300)) return false;
  return duration;
}

void setup()
{
  digitalWrite( 4 , LOW );

  Serial.begin(9600);
}

void loop()
{
  _ABVAR_1_t1 = 	ardublockUltrasonicSensorCodeAutoGeneratedReturnCM( 4 , 5 ) ;
  Serial.print("diatance:");
  Serial.print(_ABVAR_1_t1);
  Serial.println();
  delay( 200 );
}
```

**5.Result**

We can see the distance value measured by ultrasonic in the serial monitor of ARDUINO after downloading the program.

![](media/image-20251201162434992.png)