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int ledPin2 = 4;
int ledPin3 = 5;
int trigPin1 = 6;
int echoPin1 = 7;
int trigPin2 = 8;
int echoPin2 = 9;
int trigPin3 = 10;
int echoPin3 = 11;
void setup() {
Serial.begin (9600);
pinMode(trigPin1, OUTPUT);
pinMode(echoPin1, INPUT);
pinMode(trigPin2, OUTPUT);
pinMode(echoPin2, INPUT);
pinMode(trigPin3, OUTPUT);
pinMode(echoPin3, INPUT);
pinMode(ledPin1, OUTPUT);
pinMode(ledPin2, OUTPUT);
pinMode(ledPin3, OUTPUT);
}
void firstsensor(){ // This function is for first sensor.
int duration1, distance1;
digitalWrite (trigPin1, HIGH);
delayMicroseconds (10);
digitalWrite (trigPin1, LOW);
duration1 = pulseIn (echoPin1, HIGH);
distance1 = (duration1/2) / 29.1;
Serial.print("1st Sensor: ");
Serial.print(distance1);
Serial.print("cm ");
if (distance1 < 30) { // Change the number for long or short distances.
digitalWrite (ledPin1, HIGH);
} else {
digitalWrite (ledPin1, LOW);
}
}
void secondsensor(){ // This function is for second sensor.
int duration2, distance2;
digitalWrite (trigPin2, HIGH);
delayMicroseconds (10);
digitalWrite (trigPin2, LOW);
duration2 = pulseIn (echoPin2, HIGH);
distance2 = (duration2/2) / 29.1;
Serial.print("2nd Sensor: ");
Serial.print(distance2);
Serial.print("cm ");
if (distance2 < 20) { // Change the number for long or short distances.
digitalWrite (ledPin2, HIGH);
}
else {
digitalWrite (ledPin2, LOW);
}
}
void thirdsensor(){ // This function is for third sensor.
int duration3, distance3;
digitalWrite (trigPin3, HIGH);
delayMicroseconds (10);
digitalWrite (trigPin3, LOW);
duration3 = pulseIn (echoPin3, HIGH);
distance3 = (duration3/2) / 29.1;
Serial.print("3rd Sensor: ");
Serial.print(distance3);
Serial.print("cm");
if (distance3 < 10) { // Change the number for long or short distances.
digitalWrite (ledPin3, HIGH);
}
else {
digitalWrite (ledPin3, LOW);
}
}
void loop() {
Serial.println("n");
firstsensor();
secondsensor();
thirdsensor();
delay(100);
}
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