ultrasonic_with_rgb&buzzer_range_detection.txt

const int trigPin = 9; 
const int echoPin = 10;
const int buzz = 6;
const int rgb[3]={11,12,13};
float duration,distance;

void setup()
{ 
  Serial.begin (9600);
 pinMode(trigPin, OUTPUT); 
 pinMode(echoPin, INPUT);
 pinMode(rgb[0], OUTPUT);
  pinMode(rgb[1], OUTPUT);
  pinMode(rgb[2], OUTPUT);
  pinMode(buzz , OUTPUT);
} 
void loop() 
{ 
 digitalWrite(trigPin, LOW); 
 delayMicroseconds(2); 
 digitalWrite(trigPin, HIGH); 
 delayMicroseconds(10); 
 digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH); 
 distance = (duration*0.0343)/2;
if(distance<=110)
{
 analogWrite(rgb[2],255);
 delay(500);
  analogWrite(rgb[2],0);
  delay(500);
}
  else if(distance>110&&distance<=220)
  {
    analogWrite(rgb[0],255);
    delay(500);
    analogWrite(rgb[0],0);
    delay(500);
  }
  else if (distance>220&&distance<=320)
  {
    analogWrite(rgb[1],255);
    delay(500);
    analogWrite(rgb[1], 0);
    delay(500);
  }
  
 else if(distance>=320||distance<=0)
  {
    digitalWrite(buzz,HIGH);
    delay(1000);
   digitalWrite(buzz,LOW);
   
   
  }
  
  if(distance<=320)
Serial.print(distance);
Serial.println(" cm");
}