// 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 = "UJ96XBMRZC9BNN61";
// Set up the DHT sensor 
DHT dht(DHTPIN, DHT22);


// Weather station channel details
unsigned long controlChannelNumber = 2244498;
unsigned int lamp1FieldNumber = 3;
// Counting channel details
unsigned long counterChannelNumber = 2244498;
const char * ReadAPIKey = "W3GQW1MWIEOPLHCP";



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

}

// ... (existing code)

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) + " °C");
    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();
    
    long Lamp1 = ThingSpeak.readLongField(controlChannelNumber, lamp1FieldNumber, ReadAPIKey);

    // Check the status of the read operation to see if it was successful
    statusCode = ThingSpeak.getLastReadStatus();
    Serial.print("ThingSpeak Status Code: ");
    Serial.println(statusCode);
    
    if (statusCode == 200) {
      Serial.println("Control command is: " + String(Lamp1));
      if (Lamp1 == 0) {
        digitalWrite(Led, HIGH);
        Serial.println("LED is ON");
      } else {
        digitalWrite(Led, LOW);
        Serial.println("LED is OFF");
      }
    }
  } else {
    Serial.println("WiFi Disconnected");
  }
}