#include <DHT.h>                   //includes library for temperature and humidity sensor 
#include <WiFi.h>
#include "ThingSpeak.h"

uint8_t LDR = 14;                 // Define pin for LDR

#define DHT_PIN 12                // Define pin for DHT22 sensor
DHT dht(DHT_PIN, DHT22);          // Create DHT object

// Define WiFi credentials
char ssid[] = "Wokwi-GUEST";      // your network SSID (name)
char pass[] = "";                 // your network password
int keyIndex = 0;                 // your network key Index number (needed only for WEP)
WiFiClient  client;

// ThingSpeak channel details
unsigned long myChannelNumber = 2417724;               //channel number taken from cloud
const char *myWriteAPIKey = "JVAM495AH3XZP8KM";        //Write API key of cloud
const char *myCounterReadAPIKey = "COPVEQU7MCGFU0P2";  //Read API key from cloud

void setup() {
  // Initialize serial communication
  Serial.begin(115200);
  while (!Serial) {
    ; // wait for serial port to connect. native USB port only
  }

  // Initialize ThingSpeak
  ThingSpeak.begin(client);

  // Set pin modes for various pins
  pinMode(15, OUTPUT);
  pinMode(2, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
}

void loop() {
  // Connect or reconnect to WiFi
  if (WiFi.status() != WL_CONNECTED) {
    Serial.print("Attempting to connect to SSID: ");
    Serial.println(ssid);
    while (WiFi.status() != WL_CONNECTED) {
      WiFi.begin(ssid, pass);  // Connect to WPA/WPA2 network. Change this line if using open or WEP network
      Serial.print(".");
      delay(5000);
    }
    Serial.println("\nConnected.");
  }

  // Read temperature and humidity from DHT22 sensor
  float t = dht.readTemperature();
  float h = dht.readHumidity();

  // Read light status from LDR
  int L = digitalRead(LDR);
  if (L == 0) {
    L = 1;
  } else {
    L = 0;
  }

  // Set ThingSpeak fields with sensor values
  ThingSpeak.setField(1, t);
  ThingSpeak.setField(2, h);
  ThingSpeak.setField(3, L);

  // Write to the ThingSpeak channel
  int x = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
  if (x == 200) {
    Serial.println("Channel update successful.");
  }

  // Control LEDs based on conditions
  if (L == 0) {
    digitalWrite(2, HIGH);
  } else {
    digitalWrite(2, LOW);
  }

  if (t >= 25) {
    digitalWrite(15, HIGH);
  }
  if (t < 25) {
    digitalWrite(15, LOW);
  }

  // Read and control additional fields from ThingSpeak channel
  int C = ThingSpeak.readLongField(myChannelNumber, 7, myCounterReadAPIKey);
  digitalWrite(4, C);
  int D = ThingSpeak.readLongField(myChannelNumber, 8, myCounterReadAPIKey);
  digitalWrite(5, D);
}