#include <WiFi.h>
#include <HTTPClient.h>

// Define pins for sensors and output devices
const int sensor1Pin = 34; // GPIO for first sensor (potentiometer)
const int sensor2Pin = 35; // GPIO for second sensor (potentiometer)
const int sensor3Pin = 32; // GPIO for third sensor (potentiometer)
const int buzzerPin = 33;  // GPIO for buzzer
const int ledPin = 25;     // GPIO for LED (optional)

// WiFi credentials
const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";

// ThingSpeak settings
const char* apiKey = "your_THINGSPEAK_WRITE_API_KEY";
const String baseUrl = "https://api.thingspeak.com/update?api_key=" + String(apiKey);

void setup() {
  Serial.begin(115200);

  // Initialize sensor pins
  pinMode(sensor1Pin, INPUT);
  pinMode(sensor2Pin, INPUT);
  pinMode(sensor3Pin, INPUT);
  
  // Initialize output pins
  pinMode(buzzerPin, OUTPUT);
  pinMode(ledPin, OUTPUT);

  // Connect to WiFi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
void loop(){
  // Read sensor values
  int sensor1Value = analogRead(sensor1Pin);
  int sensor2Value = analogRead(sensor2Pin);
  int sensor3Value = analogRead(sensor3Pin);

  // Print sensor values to Serial Monitor
  Serial.print("Sensor 1: ");
  Serial.print(sensor1Value);
  Serial.print(" Sensor 2: ");
  Serial.print(sensor2Value);
  Serial.print(" Sensor 3: ");
  Serial.println(sensor3Value);

  // Send data to ThingSpeak
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    String url = baseUrl + "&field1=" + String(sensor1Value) +
                 "&field2=" + String(sensor2Value) +
                 "&field3=" + String(sensor3Value);
    http.begin(url);
    int httpCode = http.GET();
    if (httpCode > 0) {
      String payload = http.getString();
      Serial.println(payload);
    }
    http.end();
  }
// Check sensor values and trigger alerts
  if (sensor1Value > 1000) {
    digitalWrite(ledPin, HIGH); // Turn on LED
    tone(buzzerPin, 1000); // Activate buzzer
  } else if (sensor2Value > 1000) {
    digitalWrite(ledPin, LOW); // Turn off LED
    noTone(buzzerPin); // Deactivate buzzer
  } else if (sensor3Value > 1000) {
    digitalWrite(ledPin, LOW); // Turn off LED
    noTone(buzzerPin); // Deactivate buzzer
  }

  delay(20000); // Delay for updating ThingSpeak
}