#define BLYNK_TEMPLATE_ID "TMPL3wGxWRynx"
#define BLYNK_TEMPLATE_NAME "smart building"
#define BLYNK_AUTH_TOKEN "wKBw7EHF_TkbMSm0Kq_p0UTta7cL9FT5"

#define BLYNK_PRINT Serial

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include "DHTesp.h"

char auth[] = BLYNK_AUTH_TOKEN;

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

//calling blynk softtware
BlynkTimer timer;
//calling dht sensor
DHTesp dhtSensor;

const int dev1 = 23;
const int dev2 = 22;
const int dev3 = 21;
const int dev4 = 19;
const int dev5 = 18;
const int dht = 17;
const int button1 = 5;

int relay_s_dev1 = 0;
int relay_s_dev2 = 0;
int relay_s_dev3 = 0;
int relay_s_dev4 = 0;
int relay_s_dev5 = 0;

#define vpin1 V1
#define vpin2 V2
#define vpin3 V3
#define vpin4 V4
#define vpin5 V5

BLYNK_CONNECTED() {
  Blynk.syncVirtual(vpin1);
  Blynk.syncVirtual(vpin2);
  Blynk.syncVirtual(vpin3);
  Blynk.syncVirtual(vpin4);
  Blynk.syncVirtual(vpin5);
}

BLYNK_WRITE(vpin1){
  relay_s_dev1 = param.asInt();
  digitalWrite(dev1, relay_s_dev1);
}
BLYNK_WRITE(vpin2){
  relay_s_dev2 = param.asInt();
  digitalWrite(dev2, relay_s_dev2);
}
BLYNK_WRITE(vpin3){
  relay_s_dev3 = param.asInt();
  digitalWrite(dev3, relay_s_dev3);
}
BLYNK_WRITE(vpin4){
  relay_s_dev4 = param.asInt();
  digitalWrite(dev4, relay_s_dev4);
}
BLYNK_WRITE(vpin5){
  relay_s_dev5 = param.asInt();
  digitalWrite(dev5, relay_s_dev5);
}
// Function to read temperature from DHT sensor and send to Blynk 
void send_dht_val() { 
  TempAndHumidity data = dhtSensor.getTempAndHumidity(); // Get temperature and humidity data 
  float temp = data.temperature; // Store temperature value 
  Blynk.virtualWrite(V5, temp); // Send temperature data to Blynk app 
} 
 
// Setup function to initialize devices and WiFi connection 
void setup() { 
  pinMode(dev1, OUTPUT); // Set LED1 as output 
  pinMode(dev2, OUTPUT); // Set LED2 as output 
  pinMode(dev3, OUTPUT); // Set Buzzer1 as output 
  pinMode(dev4, OUTPUT); // Set Buzzer2 as output
  pinMode(dev5, OUTPUT); // (Unused) Set unused device as output 
 
  // Initialize push button as input with pull-up resistor 
  pinMode(button1, INPUT_PULLUP); 
   
  // Setup DHT sensor 
  dhtSensor.setup(dht, DHTesp::DHT22); // Initialize DHT22 sensor 
  Serial.begin(115200); // Start serial communication for debugging 
   
  // Initialize all outputs to HIGH (turn off devices) 
  digitalWrite(dev1, HIGH); 
  digitalWrite(dev2, HIGH); 
  digitalWrite(dev3, HIGH); 
  digitalWrite(dev4, HIGH); 
   
  // Connect to Blynk server 
  Blynk.begin(auth, ssid, pass); 
} 
 
// Function to check the status of the push button 
void button_status() { 
  if (digitalRead(button1) == LOW) { // Check if button is pressed 
    delay(500); // Debounce delay 
    controlButton(1); // Control LED1 
    Blynk.virtualWrite(vpin1, relay_s_dev1); // Update Blynk with new state 
  } 
}
// Function to toggle LED1 state 
void controlButton(int relayIn) { 
  if (relayIn == 1) { 
    relay_s_dev1 = !relay_s_dev1; // Toggle state 
    digitalWrite(dev1, relay_s_dev1); // Set the new state of LED1 
    delay(100); // Short delay to stabilize 
  } 
} 
 
// Loop function to run continuously 
void loop() { 
  Blynk.run(); // Process Blynk commands 
  timer.run(); // Run timer tasks 
  button_status(); // Check push button status 
  timer.setInterval(2000, send_dht_val); // Set interval for sending DHT data 
}