SensoryPaws: Enhancing the Walking Experience for Blind Dogs

#include <NewPing.h>
#include <NewTone.h> 

#define TRIGGER_PIN1 9
#define ECHO_PIN1 9

#define TRIGGER_PIN2 5
#define ECHO_PIN2 5

#define TRIGGER_PIN3 6
#define ECHO_PIN3 6

#define TRIGGER_PIN4 7
#define ECHO_PIN4 7

#define MAX_DISTANCE 200 // max distance the sensor will return

NewPing sonar1(TRIGGER_PIN1, ECHO_PIN1, MAX_DISTANCE); // declare a NewPing object1
NewPing sonar2(TRIGGER_PIN2, ECHO_PIN2, MAX_DISTANCE); // declare a NewPing object2
NewPing sonar3(TRIGGER_PIN3, ECHO_PIN3, MAX_DISTANCE); // declare a NewPing object3
NewPing sonar4(TRIGGER_PIN4, ECHO_PIN4, MAX_DISTANCE); // declare a NewPing object4

const int LED_PIN1  = 2; // Arduino pin connected to LED's pin
const int LED_PIN2  = 3; // Arduino pin connected to LED's pin
const int buzzerPin1 = 8; // Arduino pin connected to Buzzer's pin 1


void setup() {
  Serial.begin(9600);
  pinMode(LED_PIN1, OUTPUT);  // set arduino pin to output mode
  pinMode(LED_PIN2, OUTPUT); 
  pinMode(0,OUTPUT);
  pinMode(buzzerPin1, OUTPUT);
}

void loop() {
  delay(500);
  int uS1 = sonar1.ping(); 
  int uS2 = sonar2.ping(); 
  int uS3 = sonar3.ping(); 
  int uS4 = sonar4.ping(); 
  int n1 = uS1 / US_ROUNDTRIP_CM;
  int n2 = uS2 / US_ROUNDTRIP_CM;
  int n3 = uS3 / US_ROUNDTRIP_CM;
  int n4 = uS4 / US_ROUNDTRIP_CM;
  Serial.print("Distance: ");
  Serial.print(n1); 
  Serial.println(" and ");
  Serial.print(n2);
  Serial.println(" and ");
  Serial.print(n3);
  Serial.println(" and ");
  Serial.print(n4);
  Serial.println(" cm");

if((n2 < 20) || (n3 < 20) || (n4 < 20))
  {
    digitalWrite(LED_PIN1, HIGH); // turn on LED
    digitalWrite(LED_PIN2, HIGH); // turn on LED
   // NewTone(buzzerPin1, 300, 500);
    delay(500);
    }
    else
  {
    digitalWrite(LED_PIN1, LOW);  // turn off LED
    digitalWrite(LED_PIN2, LOW);  // turn off LED
  }
  
}