// This project implements the simulation of the reading a DHT sensor using an ESP32 
// The source code is available on my git repo at : https://github.com/Bamamou/DHT11_ESP32.git
// the only difference is the sensor, Here; we use a DHT11 while in Platform io we use a DHT22
#include <DHT.h>  
#include <WiFi.h>
#include "ThingSpeak.h" 
#include <HTTPClient.h>

#define Led 4
#define DHTPIN 5
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// Domain Name with full URL Path for HTTP POST Request
const char* serverName = "http://api.thingspeak.com/update";
// write API Key provided by thingspeak
String writeapiKey = "44Z5CC2OR86T0DSQ";
// Set up the DHT sensor 
DHT dht(DHTPIN, DHT22);


// Weather station channel details
unsigned long controlChannelNumber = 2244542;
unsigned int lamp1FieldNumber = 3;
// Counting channel details
unsigned long counterChannelNumber = 2242952;
const char * ReadAPIKey = "8BLD6SJBHCTPZRBB";



int keyIndex = 0;            // your network key Index number (needed only for WEP)
WiFiClient  client;



void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  Serial.println("Hello, ESP32!");
  WiFi.begin(ssid, password);
  Serial.println("Connecting");
  while(WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("Connected to WiFi network with IP Address: ");
  Serial.println(WiFi.localIP());
  pinMode(Led, OUTPUT);
  ThingSpeak.begin(client);  // Initialize ThingSpeak

}

void loop() {

  int statusCode = 0;
  if(WiFi.status()== WL_CONNECTED){
      WiFiClient client;
      HTTPClient http;
      delay(10000); // wait for 10 seconds
     float h = dht.readHumidity();
      float t = dht.readTemperature();
      if (isnan(t)) {
       Serial.println(F("Failed to read from DHT sensor!"));
       return;
      }
      Serial.println("Temperature"+String(t));
      Serial.println("Humidity"+String(h));

      // Your Domain name with URL path or IP address with path
      http.begin(client, serverName);
      // Specify content-type header
      http.addHeader("Content-Type", "application/x-www-form-urlencoded");
      // Data to send with HTTP POST
      String httpRequestData = "api_key=" + writeapiKey + "&field1=" + String(t)+ "&field2=" + String(h);          
      // Send HTTP POST request
      int httpResponseCode = http.POST(httpRequestData);
      Serial.print("HTTP Response code: ");
      Serial.println(httpResponseCode);
      http.end();
     //delay(1000);
      long Lamp1 = ThingSpeak.readLongField(controlChannelNumber, lamp1FieldNumber, ReadAPIKey);

  // Check the status of the read operation to see if it was successful
  statusCode = ThingSpeak.getLastReadStatus();
  if(statusCode == 200){
    Serial.println("control command is " + String(Lamp1) );
     if (Lamp1==1)
     {
      digitalWrite(Led,HIGH);
     }
     else{
        digitalWrite(Led,LOW);
     }
  
  }

    }

    else {
      Serial.println("WiFi Disconnected");
    }
  
}