/* CONNECTION INSTRUCTION
  email:[email protected] pass:kist@2024
  V0:NOTIFICATION
  V1:ENABLE/DISABLE SWITCH
  V2:PHONE-NUMBER
*/


//#define BLYNK_PRINT Serial
#define  sim        Serial2
#define BLYNK_TEMPLATE_ID "TMPL26yFiVSAo"
#define BLYNK_TEMPLATE_NAME "SMART SHOP SECURITY SYSTEM"
#define BLYNK_AUTH_TOKEN "3EVWCum2YUmRaCBvz9SSZPZsNfkCAZvd"

#define relay     23
#define buzzer    4

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


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

String notification, pnum;
bool State;
uint8_t pir[4]={25,26,32,33};

void setup()
{
  Serial.begin(115200);
  delay(100);
  sim.begin(9600);
  delay(100);
  pinMode(relay,OUTPUT);
  pinMode(buzzer,OUTPUT);
  digitalWrite(buzzer,LOW);
  digitalWrite(relay,LOW);
  Serial.println("Starting");
  for (int i; i<4;i++) pinMode(pir[i], INPUT);

  Blynk.begin(auth, ssid, pass);
  Blynk.virtualWrite(V1,LOW);
  Blynk.virtualWrite(V0,"SYSTEM INITIALIZED SUCCESSFULLY PRESS ENABLE BUTTON TO START");
}

void loop()
{
 Blynk.run();
 if(State)
 {
    if(get_data())
    {
      digitalWrite(relay,HIGH);
      notification="DANGER! INTRUDER DETECTED";
      Blynk.virtualWrite(V0,notification);
      Alert(3);
      makeCall(pnum);
    }
    else
    {
      digitalWrite(relay,LOW);
      notification="YOU ARE SAFE";
      Blynk.virtualWrite(V0,notification);
    }
 }
}

BLYNK_WRITE(V2)
{
  String data=param.asString();
  if(data!= pnum)
  {
    pnum=data;
  }
}

BLYNK_WRITE(V1)
{
 int data=param.asInt();
  if(data!= State)
  {
    State=data;
  }
}


bool get_data() 
{
    for (int i = 0; i < 4; i++)
    {
      boolean data = digitalRead(pir[i]);
      
      if(data==HIGH)
      {
        Serial.print("Motion detected, sensor ");
        Serial.print(i+1);
        Serial.println(" triggered.");
        return HIGH;
      }
    } 
    return LOW;              
}

void send_update() 
{     
  Blynk.virtualWrite(V0,notification);
  delay(150);  
}

void Alert(uint8_t num)
{
  for(num;num>0;num--)
  {
    digitalWrite(buzzer,HIGH);
    delay(1000);
    digitalWrite(buzzer,LOW);
  tone(buzzer, 100);
    delay(500);
  }
}
  
void makeCall(String phonenum)
{
  sim.println("ATD"+pnum+";");
  updateSerial();
  Serial.println("NOW DIALING");
  delay(20000);
  sim.println("ATH");
  updateSerial();
  Serial.println("CALL ENDED");
}

void updateSerial()
{
  delay(500);
  while (Serial.available()) 
  {
    sim.write(Serial.read());
  }
  while(sim.available()) 
  {
    Serial.write(sim.read());
  }
}