#include <WiFi.h>
#include <DHTesp.h>
#include <HTTPClient.h>

const char* ssid = "Wokwi-GUEST";
const char* password = "";

const char* serverName = "http://api.thingspeak.com/update";
String apiKey = "MJ4USI8T24YSBGBA";

unsigned long lastTime = 0;
unsigned long timerDelay = 10000;

const int DHT_PIN = 33;
DHTesp dhtSensor;

void setup() {
  Serial.begin(115200);
    dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  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());
 
  Serial.println("Timer set to 10 seconds (timerDelay variable), it will take 10 seconds before publishing the first reading.");

  // Random seed is a number used to initialize a pseudorandom number generator

}

void loop() {
  //Send an HTTP POST request every 10 seconds
  if ((millis() - lastTime) > timerDelay) {
    //Check WiFi connection status
    if(WiFi.status()== WL_CONNECTED){
      WiFiClient client;
      HTTPClient http;
      TempAndHumidity  data = dhtSensor.getTempAndHumidity();
          Serial.println("Temp: " + String(data.temperature, 2) + "°C");
          Serial.println("---");
    
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=" + apiKey + "&field1="+ data.temperature ;           
        int httpResponseCode = http.POST(httpRequestData); // Send HTTP POST request
      
      Serial.print("HTTP Response code: ");
      Serial.println(httpResponseCode);
  http.end();
    } 
    else {
      Serial.println("WiFi Disconnected");
    
    }
       lastTime = millis();
  }

}