#define BLYNK_TEMPLATE_ID "TMPL6hriOzg6I"
#define BLYNK_TEMPLATE_NAME "Fire protection system"
#define BLYNK_AUTH_TOKEN "Xd-JxsKbobBmtAJhOimKX9vj5ZD4RkFQ"

#define BLYNK_PRINT Serial
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <DHT.h>

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

BlynkTimer timer;

#define DHTPIN 27          // Mention the digital pin where you connected 
#define DHTTYPE DHT22     // DHT 22  
DHT dht(DHTPIN, DHTTYPE);
int led1=15, led2=4, led3=16, led4=22;
int relay1=17, relay2=18, relay3=19, relay4=21;
int PIN_TRIG = 25;
int PIN_ECHO = 33;
int const LDR = 26;
int ldrsensor;
int duration;
int celsius;
const float BETA = 3950;
#define BUTTON_PIN 12

boolean bt1_state=HIGH;

const int pinVirtual1 = V0;
const int pinVirtual2 = V1;
const int pinVirtual3 = V2;

void setup()
{
  Serial.begin(115200);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  pinMode(relay1, OUTPUT);
  pinMode(relay2, OUTPUT);
  pinMode(relay3, OUTPUT);
  pinMode(relay4, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  pinMode(26,INPUT);
  pinMode(27,INPUT);
  pinMode(PIN_TRIG, OUTPUT);
  pinMode(PIN_ECHO, INPUT);
  analogReadResolution(10);
  dht.begin();
  Blynk.begin(auth, ssid, pass);
}



void loop()
{
    // Đọc giá trị nhiệt độ NTC
  float t = dht.readTemperature();
  Serial.print("Nhiet do: ");
  Serial.print(t);
  Serial.print(" ℃");

    // Đọc giá trị nhiệt độ LDR
  int ldrsensor = analogRead(LDR);
  Serial.print("   - Do sang: ");
  Serial.print(ldrsensor);

    // Đọc giá trị nhiệt độ Ultra
  digitalWrite(PIN_TRIG, HIGH);
  delayMicroseconds(10);
  digitalWrite(PIN_TRIG, LOW);
  int duration = pulseIn(PIN_ECHO, HIGH);
  long khoangcach = duration/58;
  Serial.print("   - Khoang canh: ");
  Serial.print(khoangcach);
  Serial.println(" cm");

  if (t < 40 || khoangcach > 300 || ldrsensor < 500) 
  {
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
    digitalWrite(relay1, LOW);
    digitalWrite(relay2, LOW);
    digitalWrite(relay3, LOW);
    digitalWrite(relay4, LOW);
  } 
  if (t >= 40) 
  {
    digitalWrite(led1, HIGH);
    digitalWrite(relay1, HIGH);
    digitalWrite(relay2, HIGH);
    digitalWrite(relay3, HIGH);
    digitalWrite(relay4, LOW);
    Blynk.logEvent("temp_alert","Canh bao nhiet do cao");

  } 
  if (khoangcach > 0 && khoangcach < 300) 
  {
    digitalWrite(led2, HIGH);
    digitalWrite(relay1, HIGH);
    digitalWrite(relay2, HIGH);
    digitalWrite(relay3, HIGH);
    digitalWrite(relay4, LOW);
    Blynk.logEvent("distance_alert","Canh bao khoang cach");
  }

  if (ldrsensor >= 500) 
  {
    digitalWrite(led3, HIGH);
    digitalWrite(relay1, HIGH);
    digitalWrite(relay2, HIGH);
    digitalWrite(relay3, HIGH);
    digitalWrite(relay4, LOW);
  }
  if (t > 60 && khoangcach < 40) 
  {
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(relay1, HIGH);
    digitalWrite(relay2, HIGH);
    digitalWrite(relay3, HIGH);
    digitalWrite(relay4, HIGH);
    Blynk.logEvent("water_pump","Bom chua chay");
  }

  Blynk.run();
  check_button();

  // Đọc trạng thái của các LED (giả sử các LED đã được điều khiển bằng một cách nào đó)
  int state1 = digitalRead(led1);
  int state2 = digitalRead(led2);
  int state3 = digitalRead(led3);

  // Gửi trạng thái lên Blynk
  Blynk.virtualWrite(pinVirtual1, state1);
  Blynk.virtualWrite(pinVirtual2, state2);
  Blynk.virtualWrite(pinVirtual3, state3);
}
  BLYNK_WRITE(V3){
  int p = param.asInt();
  digitalWrite(led4, p);
  delay(10);
  }

void check_button()
{
  if(digitalRead(BUTTON_PIN)==LOW){
    if(bt1_state==HIGH){
      digitalWrite(led4,!digitalRead(led4));
      Blynk.virtualWrite(V3,digitalRead(led4));
      bt1_state=LOW;
      delay(10);
    }
  }else{
    bt1_state=HIGH;
}
}