#include <WiFi.h>
#include <HTTPClient.h>
#include "DHT.h"
#define DHTPIN 33
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

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

const char* serverName = "http://api.thingspeak.com/update";
String apiKey = "SSU4WLCO2VR43441"; //เอา API ตัวเองมาใส่++++++++++++

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

void setup() {
  Serial.begin(115200);

  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
  randomSeed(analogRead(33));
}

void loop() {
  float T = dht.readTemperature();
  //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;
    
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=" + String(T);//เปลี่ยน random เป็น T           
        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();
  }
}