วิธีการต่อขา ใช้งาน โมดูลวัดระยะทาง Ultrasonic Module
ต่อกับบอร์ด Arduino
Vcc - 5v
Gnd - Gnd
Trig - 12
Echo - 11
ตัวอย่างโคด Arduino
| | const int pingPin = 13;
int inPin = 12;
void setup() {
Serial.begin(9600);
}
void loop()
{
long duration, cm;
pinMode(pingPin, OUTPUT);
digitalWrite(pingPin, LOW);
delayMicroseconds(2);
digitalWrite(pingPin, HIGH);
delayMicroseconds(5);
digitalWrite(pingPin, LOW);
pinMode(inPin, INPUT);
duration = pulseIn(inPin, HIGH);
cm = microsecondsToCentimeters(duration);
Serial.print(cm);
Serial.print("cm");
Serial.println();
delay(100);
}
long microsecondsToCentimeters(long microseconds)
{
// The speed of sound is 340 m/s or 29 microseconds per centimeter.
// The ping travels out and back, so to find the distance of the
// object we take half of the distance travelled.
return microseconds / 29 / 2;
} |
ultrasonic sr04 library for arduino
https://www.arduino.cc/reference/en/libraries/hcsr04-ultrasonic-sensor/
https://www.arduinolibraries.info/libraries/hcsr04
