#include "ThingSpeak.h"
#include "DHT.h"
#include <WiFi.h>
#include <WiFiClient.h>
#include <string.h>


char ssid[] = "Wokwi-GUEST";
char pass[] = "";


#define SECRET_CH_ID 2169013			// replace 0000000 with your channel number
#define SECRET_WRITE_APIKEY "68M30L6G4J706K13"   // replace XYZ with your channel write API Key

// DHT define
#define DHTTYPE DHT22   // DHT 22
#define DHTPIN 14
DHT dht(DHTPIN, DHTTYPE);

// Define LED
#define LED 27
#define BT_PIN 15


WiFiClient  client;

unsigned long myChannelNumber = SECRET_CH_ID;
const char * myWriteAPIKey = SECRET_WRITE_APIKEY;

int D_value;
int buttonState = 0;

unsigned long dataMillis = 0;

void setup()
{
  Serial.begin(115200); //Initialize serial
  // Debug console
  pinMode(LED, OUTPUT);
  digitalWrite(LED, LOW);
  dht.begin();

  WiFi.begin(ssid,pass);
  Serial.print("Connecting to Wi-Fi");
  while (WiFi.status() != WL_CONNECTED)
  {
      Serial.print(".");
      delay(100);
  }
  
  Serial.println();
  Serial.print("Connected with IP: ");
  Serial.println(WiFi.localIP());
  Serial.println();

  ThingSpeak.begin(client);  // Initialize ThingSpeak
}

void loop()
{
  // Read Temp
  float t = dht.readTemperature();
  // Read Humi
  float h = dht.readHumidity();
  // Check isRead ?
  if (isnan(h) || isnan(t)) {
    delay(500);
    Serial.println("Failed to read from DHT sensor!\n");
    return;
  }

  Serial.print("\n");
  Serial.print("Humidity: " + String(h) + "%");
  Serial.print("\t");
  Serial.print("Temperature:" + String(t) + " C");
  delay(2000);


  ThingSpeak.setField(1, String(h));
  ThingSpeak.setField(2, String(t));

  if (millis() - dataMillis > 500)
  {
    int x = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
    if(x == 200){
      Serial.println("Channel update successful.");
    }
    else {
      Serial.println("Problem updating channel. HTTP error code " + String(x));
    }  
  }

  if(t>40){
    D_value = 1;
  }
  else D_value = 0;
  //ThingSpeak.setField(3, D_value);
  
  if (D_value) {
    digitalWrite(LED, HIGH);
    delay(300);
    digitalWrite(LED, LOW);
    delay(300);

  }
  else  digitalWrite(LED, LOW);

  
  
}