#define BLYNK_TEMPLATE_ID "TMPL6L_IZrTtN"
#define BLYNK_TEMPLATE_NAME "Presentation 03 Assignment"
#define BLYNK_AUTH_TOKEN "88YoD6E0Px5DjsGqT_n2UBsVZQNyeFtE"

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#define BLYNK_PRINT Serial
char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

#include <DHT.h>
#define cb 33
const int DHTTYPE = DHT22;
DHT dht(cb, DHTTYPE);
float doC ;
float  doam;
#define quat 22
bool quat_status = false;
unsigned long time_dht = 0;

void sendSensor()
{
  doC = dht.readTemperature();
  doam = dht.readHumidity();

  if (isnan(doC) || isnan(doam)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }
  Serial.print("Temp: " + String(doC, 2) + "°C" + "     ");
  Blynk.virtualWrite(V0, doC);
  Serial.println("Humi: " + String(doam, 1) + "%");
  Blynk.virtualWrite(V1, doam); 

  if (doC > 30) {
    // !quat_status = true => if(true) -> ok
    if (!quat_status) {
      digitalWrite(quat, HIGH);  // Kích hoạt Relay
      Blynk.virtualWrite(V2, HIGH);   // Gửi trạng thái Relay lên V2 trên Blynk
      quat_status = true;
    }
  } 
  else {
    if (quat_status) {
      digitalWrite(quat, LOW);   // Tắt Relay
      Blynk.virtualWrite(V2, LOW);    // Gửi trạng thái Relay lên V2 trên Blynk
      quat_status = false;
    }
  }
}

BLYNK_WRITE(V2){
  int value = param.asInt(); // Get value from Blynk app (0 or 1)
  if (value == 1) {
    digitalWrite(quat, HIGH);  // Kích hoạt Relay
    quat_status = true;
  } else {
    digitalWrite(quat, LOW);   // Tắt Relay
    quat_status = false;
  }
}

void setup() {
  Blynk.begin(auth, ssid, pass);
  Serial.begin(115200);
  dht.begin();
  pinMode(quat, OUTPUT);
  digitalWrite(quat, LOW);
}

void loop() {
  Blynk.run();
  if (millis() - time_dht >= 1000) {
    time_dht = millis();
    sendSensor();
  }
}