#define BLYNK_TEMPLATE_ID "TMPL3zBxNvLT_"
#define BLYNK_TEMPLATE_NAME "Room Automation"
#define BLYNK_AUTH_TOKEN "BL3Cyhy_sh6G6NdFYxyjqxMlOW6OYpLf"

#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 button1_pin 26
#define button2_pin 25

#define relay1_pin 13
#define relay2_pin 12

int relay1_state = 0;
int relay2_state = 0;

#define button1_vpin    V1
#define button2_vpin    V2
#define temp_vpin       V5
#define humidity_vpin   V6

#define DHTPIN 15  // DHT SDA Pin

DHT dht(DHTPIN, DHT22);

BLYNK_CONNECTED()
{
  Blynk.syncVirtual(button1_vpin);
  Blynk.syncVirtual(button2_vpin);
}

BLYNK_WRITE(button1_vpin) 
{
  relay1_state = param.asInt();
  digitalWrite(relay1_pin, relay1_state);
}
BLYNK_WRITE(button2_vpin) 
{
  relay2_state = param.asInt();
  digitalWrite(relay2_pin, relay2_state);
}

void sendSensor()
{
  float h = dht.readHumidity();
  float t = dht.readTemperature(); 
  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  Blynk.virtualWrite(temp_vpin, t);     // V5 is for Temperature
  Blynk.virtualWrite(humidity_vpin, h); // V6 is for Humidity
}

void setup()
{
  Serial.begin(115200);
  pinMode(button1_pin, INPUT_PULLUP);
  pinMode(button2_pin, INPUT_PULLUP);
 
  pinMode(relay1_pin, OUTPUT);
  pinMode(relay2_pin, OUTPUT);
  digitalWrite(relay1_pin, HIGH);
  digitalWrite(relay2_pin, HIGH);
  Blynk.begin(auth, ssid, pass);

  dht.begin();

  timer.setInterval(1000L, sendSensor);
}

void loop()
{
  Blynk.run();
  timer.run();
  listen_push_buttons();
}

void listen_push_buttons()
{
    if(digitalRead(button1_pin) == LOW){
      delay(200);
      control_relay(1);
      Blynk.virtualWrite(button1_vpin, relay1_state); // update button state
    }
    else if (digitalRead(button2_pin) == LOW){
      delay(200);
      control_relay(2);
      Blynk.virtualWrite(button2_vpin, relay2_state); // update button state
    }
}

void control_relay(int relay)
{
  if(relay == 1){
    relay1_state = !relay1_state;
    digitalWrite(relay1_pin, relay1_state);
    Serial.print("Relay1 State = ");
    Serial.println(relay1_state);
    delay(50);
  }
  else if(relay == 2){
    relay2_state = !relay2_state;
    digitalWrite(relay2_pin, relay2_state);
    delay(50);
  }
}