//Produzido por: Rebson Ramalho
//IFPE Campus Palmares
//ADS 6º Periodo

#include <DHT.h>
#include <WiFi.h>
#include "ThingSpeak.h"
#include <HTTPClient.h>
#include <UrlEncode.h>

const char* WIFI_NAME = "Wokwi-GUEST";
const char* WIFI_PASSWORD = "";

String phoneNumber = "+558196815428";
String apiKey = "6224799";

const int myChannelNumber =2491296 ;
const char* myApiKey = "MIO9O6PXSXM1KGTH";
const char* server = "api.thingspeak.com";

#define DHTPIN 2     // define o pino do sensor
#define DHTTYPE DHT22   // define o tipo de sensor
#define MQ2 34
#define MQ2D 35
int sensorValue = 0;
boolean state = false;



DHT dht(DHTPIN, DHTTYPE);   // cria um objeto DHT
WiFiClient client;

void sendMessage(String message) {

  // Data to send with HTTP POST
  String url = "https://api.callmebot.com/whatsapp.php?phone=" + phoneNumber + "&apikey=" + apiKey + "&text=" + urlEncode(message);
  HTTPClient http;
  http.begin(url);

  // Specify content-type header
  http.addHeader("Content-Type", "application/x-www-form-urlencoded");

  // Send HTTP POST request
  int httpResponseCode = http.POST(url);
  if (httpResponseCode == 200) {
    Serial.print("Mensagem enviada com sucesso");
  } else {
    Serial.println("Erro no envio da mensagem");
    Serial.print("HTTP response code: ");
    Serial.println(httpResponseCode);
  }

  // Free resources
  http.end();
}

void setup() {
  Serial.begin(9600);   // inicializa a comunicação serial
  dht.begin() ;   // inicializa o sensor DHT
  
  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);
  pinMode(MQ2, INPUT);
  pinMode(MQ2D, INPUT);
}


void loop() {
  delay(2000);   // aguarda 2 segundos

  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();


  int co2Value = analogRead(MQ2);
  co2Value = map(co2Value, 0 , 4095, 0, 100); //conversão dos valores para irem de 0 a 100 se passar de 43 ja é preocupante.
  float co2D = digitalRead(MQ2D);
  //ThingSpeak.setField(1, co2Value);
  Serial.println(co2D);
  Serial.print("Gás: ");
  Serial.println(co2Value);

  // imprime os valores de temperatura e umidade na porta serial
  Serial.print("Temperatura: ");
  Serial.print(temperature);
  Serial.print(" °C ");
  Serial.print("Umidade: ");
  Serial.print(humidity);
  Serial.println(" %");


  ThingSpeak.setField(1, temperature);
  ThingSpeak.setField(2, humidity);
  ThingSpeak.setField(3, co2Value);
  ThingSpeak.writeFields(myChannelNumber,myApiKey);
  
  //if (co2Value >= 21){
//
      //sendMessage("O nivel de gás esta alto, por favor checar" );
      
  //}

}