#define BLYNK_TEMPLATE_ID "TMPL3AVby_oHX"
#define BLYNK_TEMPLATE_NAME "test"
#define BLYNK_AUTH_TOKEN "aefsohISrabr-5j1DJbLdRESj0LKc5hO"
#define BLYNK_PRINT Serial

#include <BlynkSimpleEsp32.h>


char ssid[] = "Wokwi-GUEST";//network configuration-using WiFi to connect to Blynk
char pass[] = "";



#include <ESP32Time.h>//time library to keep track of latest motion trigger
ESP32Time rtc(3600);

int sensorPin=0;//pin configurations
int buzzerPin=2;
int buttonPin=4;

int volVar;       //variable that decides the mode(sound of the buzzer)
long lastTrip=0;//variable to store the latest occurence of motion trip
long buttonTrip;//variable to store the latest button push
int bufferTime=10;//time from the latest motion within 
int bufferDelay=4;
//pushing the button will result in automatic switching to a lower pitch
//set to 10 seconds for demonstration purposes



void ringDoor(int volVar)     //function for the different sound to be generated in different modes
{
  if (volVar==1)
  {
      tone(buzzerPin,100);
      delay(100);
      noTone(buzzerPin);
  }
  else if (volVar==2)
  {
      tone(buzzerPin,200);
      delay(100);
      noTone(buzzerPin);
  }
  else if (volVar==3)
  {
      tone(buzzerPin,300);
      delay(100);
      noTone(buzzerPin);
  }
}

BLYNK_WRITE(V0)                   //reading the mode value from the slider in Blynk app through virtual pin 0
{
  volVar = param.asInt();
  if (volVar==1)
  {
    Serial.println("Buzzer mode is in night mode-Lowest Pitch");//displaying the current buzzer mode
  }else if (volVar==2)
  {
    Serial.println("Buzzer mode is in ambient mode-Medium Pitch");
  }else
  {
    Serial.println("Buzzer mode is in away mode-Highest Pitch");
  }
}
void setup() {

  Serial.begin(115200);
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
  pinMode(sensorPin, INPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(buttonPin, INPUT);
  
}

void loop() {
 
  int buttonState=digitalRead(buttonPin);//reads state of the button
  int sensorTrip=digitalRead(sensorPin);//reads motion trip in PIR sensor
  if (sensorTrip==HIGH)
  {
    lastTrip=rtc.getLocalEpoch();//updating the latest motion trip of the PIR sensor
    
  }
  if (buttonState == HIGH)
  {
    buttonTrip=rtc.getLocalEpoch();
    if((buttonTrip-lastTrip)<=(bufferTime-bufferDelay))//checking if the time of button push is 
                                //within the buffer time of the latest motion trip
    {
      volVar=1;
      Serial.println("Recent activity");
    }
    else{
      Blynk.run();           //if not, obtain the mode variable val from blynk app
    }
    
    ringDoor(volVar);               //playing the buzzer
    
  }
  sensorTrip=LOW;//resetting motion trip to low

}