#include "WiFi.h"

WiFiClient client;

#include <DHTesp.h>

const int DHT_PIN = 15;

DHTesp dhtSensor;
#include <LiquidCrystal_I2C.h>

String thingSpeakAddress = "api.thingspeak.com";
String request_string;
LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);

void setup()
{
  Serial.begin(115200);
  WiFi.disconnect();
  WiFi.begin("Wokwi-GUEST", "");
  LCD.init();
  LCD.backlight();
  while (WiFi.status() != WL_CONNECTED) {
    delay(300);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
  LCD.setCursor(0,0);
  LCD.print("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
  LCD.setCursor(0,1);
  LCD.print(WiFi.localIP());
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
}


void loop()
{
  delay(2000);
  TempAndHumidity data = dhtSensor.getTempAndHumidity(); 

  float t = data.temperature; 
  float h = data.humidity; 

  LCD.clear();
  LCD.setCursor(0,0);
  LCD.print("TEMPERATURE:");
  LCD.setCursor(12,0);
  LCD.print(t);
  LCD.setCursor(0,1);
  LCD.print("HUMIDITY:");
  LCD.setCursor(9,1);
  LCD.print(h);
  kirim_thingspeak(t, h); 

  if (isnan(h) || isnan(t) ) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }
}

void kirim_thingspeak(float t, float hum) {
  if (client.connect("api.thingspeak.com", 80)) { 
    request_string = "/update?"; 
    request_string += "key="; 
    request_string += "EXMJUV2AVX4946P6"; 
    request_string += "&"; 
    request_string += "field1"; 
    request_string += "="; 
    request_string += String(t); 
    request_string += "&"; 
    request_string += "field2"; 
    request_string += "="; 
    request_string += String(hum); 

    Serial.println(String("GET ") + request_string + " HTTP/1.1\r\n" +
                 "Host: " + thingSpeakAddress + "\r\n" +
                 "Connection: close\r\n\r\n"); 
    client.print(String("GET ") + request_string + " HTTP/1.1\r\n" +
                 "Host: " + thingSpeakAddress + "\r\n" +
                 "Connection: close\r\n\r\n"); 
                 delay(5000);
    unsigned long timeout = millis();
    while (client.available() == 0) { 
      if (millis() - timeout > 5000) {
        Serial.println(">>> Client Timeout !");
        client.stop();
        return;
      }
    }

    while (client.available()) { 
      String line = client.readStringUntil('\r');
      Serial.print(line);
    }

    Serial.println();
    Serial.println("closing connection");

  }
}