#include <WiFi.h>               // Wi-Fi library for ESP32
#include <HTTPClient.h>          // HTTP client to send requests
#include <ThingSpeak.h> 

const char* ssid = "Wokwi-GUEST";          // Replace with your Wi-Fi SSID
const char* password = "";  // Replace with your Wi-Fi password
String apiKey = "QSN6LM0N6TZIDQQL";  // Replace with your ThingSpeak API key
//New code added up..

WiFiClient  client;

unsigned long myChannelNumber = 1;
const char * myWriteAPIKey = "QSN6LM0N6TZIDQQL";
//New code added up..

int pirPin = 15;  // PIR sensor OUT pin connected to GPIO15
int ledPin = 2;   // LED connected to GPIO2 (ESP32 built-in LED)
bool motionDetected = false;

void setup() {
  Serial.begin(115200);
  pinMode(pirPin, INPUT);
  pinMode(ledPin, OUTPUT);
  Serial.println("PIR Sensor Test Started...");

  //New code (Might remove)
  WiFi.mode(WIFI_STA);   
  
  ThingSpeak.begin(client);  // Initialize ThingSpeak
  //Newcode (Might remove)

  // Connect to Wi-Fi (Newly added code)
  WiFi.begin(ssid, password, 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
    Serial.print("IP Address: ");
  Serial.println(WiFi.localIP());
  }
  Serial.println("Connected to WiFi"); // Newly added Code ends here
}

void loop() {
  int pirState = digitalRead(pirPin);  // Read PIR sensor output
  if (pirState == HIGH) {              // Motion detected
    if (!motionDetected) {
      motionDetected = true;
      digitalWrite(ledPin, HIGH);      // Turn on LED
      Serial.println("Motion detected!");
      // Trigger camera and cloud upload
    }
  } else {
    if (motionDetected) {
      motionDetected = false;
      digitalWrite(ledPin, LOW);       // Turn off LED
      Serial.println("Motion ended");
    }
  }
  delay(1000);


  // Send data to ThingSpeak (Newly added code)
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;

    // ThingSpeak API endpoint
    String url = "http://api.thingspeak.com/update?api_key=" + apiKey + "&field1=" + String(motionDetected);

    http.begin(url);  // Initiate HTTP connection
    int httpResponseCode = http.GET();  // Send HTTP GET request

    if (httpResponseCode > 0) {
      String response = http.getString();
      Serial.println(httpResponseCode);  // Print HTTP response code
      Serial.println(response);          // Print server response
    } else {
      Serial.println("Error in sending request");
    }

    http.end();  // Close connection
  }

  delay(20000);  // Send data every 20 seconds (Newly added code ends here)
}