/*********
  Zaman Ku
  Complete project details at https://wokwi.com/projects/359319453638877185
*********/

const int trigPin = 5;
const int echoPin = 18;
const int trigPin1 = 19;
const int echoPin1 = 21;

//define sound speed in cm/uS
#define SOUND_SPEED 0.034
#define CM_TO_INCH 0.393701

long duration;
float distanceCm;
float distanceInch;
long duration1;
float distanceCm1;
float distanceInch1;

void setup() {
  Serial.begin(115200); // Starts the serial communication
  Serial.println("Hello, ESP32!");
  pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
  pinMode(echoPin, INPUT); // Sets the echoPin as an Input
  pinMode(trigPin1, OUTPUT); // Sets the trigPin as an Output
  pinMode(echoPin1, INPUT); // Sets the echoPin as an Input
}

void loop() {
  // Clears the trigPin
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  // Sets the trigPin on HIGH state for 10 micro seconds
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  // Reads the echoPin, returns the sound wave travel time in microseconds
  duration = pulseIn(echoPin, HIGH);
    
  // Calculate the distance
  distanceCm = duration * SOUND_SPEED/2;
    
  // Convert to inches
  distanceInch = distanceCm * CM_TO_INCH;
    
  // Prints the distance in the Serial Monitor
  Serial.print("Distance (cm): ");
  Serial.println(distanceCm);
  Serial.print("Distance (inch): ");
  Serial.println(distanceInch);
      
  delay(1000);


   // Clears the trigPin1
  digitalWrite(trigPin1, LOW);
  delayMicroseconds(2);
  // Sets the trigPin1 on HIGH state for 10 micro seconds
  digitalWrite(trigPin1, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin1, LOW);
  // Reads the echoPin, returns the sound wave travel time in microseconds
  duration1 = pulseIn(echoPin1, HIGH);
  
  // Calculate the distance
  distanceCm1 = duration1 * SOUND_SPEED/2;
  
  // Convert to inches
  distanceInch1 = distanceCm1 * CM_TO_INCH;
  
  // Prints the distance in the Serial Monitor
  Serial.print("Distance1 (cm): ");
  Serial.println(distanceCm1);
  Serial.print("Distance1 (inch): ");
  Serial.println(distanceInch1);
  
  delay(1000);
}