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

const char* ssid = "YOUR_SSID";          // Replace with your Wi-Fi SSID
const char* password = "YOUR_PASSWORD"; // Replace with your Wi-Fi password
const char* apiKey = "V3E4PS0XRGPBCO12"; // Replace with your ThingSpeak Write API Key

const int ldrPin = 0; // LDR connected to analog pin A0
const int pirPin = 12;  // PIR sensor connected to digital pin D2
const int ledPin = 5;  // LED connected to digital pin D3

WiFiClient client;

void setup() {
  Serial.begin(9600);
  pinMode(ledPin, OUTPUT);
  pinMode(pirPin, INPUT);
  
  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");
  
  ThingSpeak.begin(client);
}

void loop() {
  int ldrValue = analogRead(ldrPin);
  int pirValue = digitalRead(pirPin);
  
  // Control LED based on motion and light level
  if (pirValue == HIGH) {
    if (ldrValue < 300) { // Adjust threshold as needed
      analogWrite(ledPin, 255); // Turn on LED
    }
  } else {
    analogWrite(ledPin, 0); // Turn off LED
  }

  // Send data to ThingSpeak
  ThingSpeak.setField(1, ldrValue);  // Field 1: LDR Value
  ThingSpeak.setField(2, pirValue);  // Field 2: PIR Status (0 or 1)
  
  // Write data to ThingSpeak
  int x = ThingSpeak.writeFields(2680671, apiKey);
  if (x == 200) {
    Serial.println("Data sent to ThingSpeak successfully");
  } else {
    Serial.print("Failed to send data to ThingSpeak. Error code: ");
    Serial.println(x);
  }
  
  delay(20000); // Send data every 20 seconds
}