#define BLYNK_TEMPLATE_ID "TMPL60erwpwW0"
#define BLYNK_TEMPLATE_NAME "Hệ thống tưới tiêu tự động"
#define BLYNK_AUTH_TOKEN "j0TK2sgZ4Kd5OIqESttC3sW_rjbG8T5K"

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <string.h>
#include <WiFi.h>
#include <DHT.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define DHT_TYPE DHT22
#define DHT_PIN 14
DHT dht(DHT_PIN,DHT_TYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);

#define LED 27
WidgetLED LED_ON_APP(V2);
int button;

char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

void setup() {
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass); // mã token, name wifi, password
  Serial.print("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED){
     delay(100);
     Serial.print(".");
   }
  Serial.println(" Connected!");
  lcd.init();
  lcd.setCursor(4, 1);
  lcd.print("Saving house");
  pinMode(LED, OUTPUT);
  delay(5000);
}

BLYNK_WRITE(V3)
{
  button = param.asInt();
  if (button == 1) 
  {
    digitalWrite(LED, HIGH);
    LED_ON_APP.on();
  }
  else
  {
    digitalWrite(LED, LOW);
    LED_ON_APP.off();
  }
}

void loop() {
  lcd.clear();
  Blynk.run(); 
  
  float t = dht.readTemperature();
  float h = dht.readHumidity();

  if (isnan(h) || isnan(t))
  {
    delay(500);
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  Blynk.virtualWrite(V0,t);
  Blynk.virtualWrite(V1,h);
  Blynk.virtualWrite(V3,button);

  lcd.setCursor(0, 0);
  lcd.print("Temp: " + (String)t + " C");
  lcd.setCursor(0, 1);
  lcd.print("Humidity: " + (String)h + " %");

  Serial.print("\n");
  Serial.print("Temperature " + (String)t + " độ C");
  Serial.print("\t");
  Serial.print("Humidity " + (String)h + "%");

  delay(3000);
}