#include <WiFi.h>
#include <ThingSpeak.h>

char ssid[] = "Wokwi-GUEST";
char pass[] = "";
long myChannelNumber = 2621914;
const char *myWriteAPIKey = "5SY0UGQK5NMCD78G";
int statusCode;
const int irPin1 = 15; 
const int irPin2 = 19; // IR sensor analog input pin
const int ledPin1 = 13; 
const int ledPin2 = 5; // LED pin
const int buzzerPin = 12;  // Buzzer pin
const int threshold = 500;  // Adjust IR sensor threshold value

WiFiClient Client;

void setup() {
  Serial.begin(115200); // Initialize serial communication

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, pass); 
  
  // Wait for WiFi to connect
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(500);
  }

  Serial.println("\nConnected to WiFi.");
  ThingSpeak.begin(Client);
  
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(irPin1, INPUT);
  pinMode(irPin2, INPUT);
}

void loop() {
  int irValue1 = analogRead(irPin1);
  int irValue2 = analogRead(irPin2);

  Serial.print("IR1: ");
  Serial.print(irValue1);
  Serial.print(" IR2: ");
  Serial.println(irValue2);

  if (irValue1 < threshold) { 
    Serial.println("Object detected at IR1");
    digitalWrite(ledPin2, HIGH);
    tone(buzzerPin, 750);  // Produce a 750 Hz sound
    delay(1000);
    noTone(buzzerPin);
    digitalWrite(ledPin2, LOW);
  }
  else if (irValue2 < threshold) {
    Serial.println("Object detected at IR2");
    digitalWrite(ledPin1, HIGH);
    tone(buzzerPin, 650);  // Produce a 650 Hz sound
    delay(1000);
    noTone(buzzerPin);
    digitalWrite(ledPin1, LOW);
  }
  else {
    digitalWrite(ledPin2, LOW);
    digitalWrite(ledPin1, LOW);
    noTone(buzzerPin);
  }

  // Update ThingSpeak
  ThingSpeak.setField(1, irValue1);
  ThingSpeak.setField(2, irValue2);
  
  statusCode = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);

  if(statusCode == 200) { //successful writing code
    Serial.println("Channel update successful.");
  } 
  else {
    Serial.print("Problem Writing data. HTTP error code: ");
    Serial.println(statusCode);
  }

  delay(15000); // Update ThingSpeak every 15 seconds
}