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

#define ldrPin 2

const int PIR_PIN = 14;
const int DHT_PIN = 15;
const int LDR_PIN = A0;  // Define the LDR pin
const int LED_PIN = 12;
const float gama = 0.7;
const float rl10 = 50;

int pirState = LOW;
int val = 0;
int ldrValue = 0;  // Variable to store LDR value

const char* WIFI_NAME = "Wokwi-GUEST";
const char* WIFI_PASSWORD = "";
const int myChannelNumber = 2996048;
const char* myApiKey = "VFZ3WMLX146INWU0";
const char* server = "api.thingspeak.com";

DHTesp dhtSensor;
WiFiClient client;

void setup() {
  Serial.begin(115200);
  pinMode(PIR_PIN, INPUT);
  pinMode(LDR_PIN, INPUT);  // Set the LDR pin as an input
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  pinMode(LED_PIN, OUTPUT);
  WiFi.begin(WIFI_NAME, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED){
    delay(1000);
    Serial.println("Wifi not connected");
  }
  Serial.println("Wifi connected !");
  Serial.println("Local IP: " + String(WiFi.localIP()));
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
}

void loop() {
  TempAndHumidity  data = dhtSensor.getTempAndHumidity();
  ThingSpeak.setField(1, data.temperature);
  ThingSpeak.setField(2, data.humidity);

  // Read PIR sensor
  val = digitalRead(PIR_PIN);
  if (val == HIGH) {
    pirState = HIGH;
    digitalWrite(LED_PIN, HIGH);  // Turn on LED when motion is detected
  } else {
    pirState = LOW;
    digitalWrite(LED_PIN, LOW);   // Turn off LED when no motion
  }

  // Read LDR sensor
  ldrValue = analogRead(LDR_PIN);

  // Send motion detection and LDR data
  ThingSpeak.setField(3, pirState); // Use Field 3 for motion detection data
  ThingSpeak.setField(4, ldrValue); // Use Field 4 for LDR data

  int x = ThingSpeak.writeFields(myChannelNumber, myApiKey);
  
  Serial.println("Temp: " + String(data.temperature, 2) + "°C");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");
  Serial.println("LDR Value: " + String(ldrValue));

  if (pirState == HIGH) {
    Serial.println("Motion Detected!");
  }
  
  if (x == 200){
    Serial.println("Data pushed successfully");
  } else {
    Serial.println("Push error: " + String(x));
  }
  Serial.println("---");

  delay(10000);
}