#define BLYNK_TEMPLATE_ID "TMPL3p-ew5lwh"
#define BLYNK_TEMPLATE_NAME "WATER LEVEL"
#define BLYNK_AUTH_TOKEN "Q3QilHPL4lmpCqbCw2Bc4GRRP4xOJPVL"


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


int emptyTankDistance = 70 ;  
int fullTankDistance =  30 ;  


int triggerPer =   10 ; 

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <AceButton.h>
using namespace ace_button; 


#define TRIGPIN    27  
#define ECHOPIN    26  
#define wifiLed    2   
#define ButtonPin1 12  
#define BuzzerPin  13  
#define GreenLed   14  


#define VPIN_BUTTON_1 V0
#define VPIN_BUTTON_2 V3

float duration;
float distance;
int waterLevelPer;
bool toggleBuzzer = HIGH; 

char auth[] = BLYNK_AUTH_TOKEN;

BlynkTimer timer;

void checkBlynkStatus() { 

  bool isconnected = Blynk.connected();
  if (isconnected == false) {
    
    digitalWrite(wifiLed, LOW);
  }
  if (isconnected == true) {
    digitalWrite(wifiLed, HIGH);
    
  }
}

BLYNK_CONNECTED() {
  Blynk.syncVirtual(VPIN_BUTTON_1);
  Blynk.syncVirtual(VPIN_BUTTON_2);
}
void measureDistance(){
  digitalWrite(TRIGPIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIGPIN, HIGH);
  delayMicroseconds(20);
  digitalWrite(TRIGPIN, LOW);
  duration = pulseIn(ECHOPIN, HIGH);
  distance = ((duration / 2) * 0.343)/10;
  if (distance > (fullTankDistance - 10)  && distance < emptyTankDistance ){
    waterLevelPer = map((int)distance ,emptyTankDistance, fullTankDistance, 0, 100);
    Blynk.virtualWrite(VPIN_BUTTON_1, waterLevelPer);
    Blynk.virtualWrite(VPIN_BUTTON_2, (String(distance) + " cm"));

    
    Serial.print("Distance: ");
    Serial.print(distance);
    Serial.println(" cm");

    if (waterLevelPer < 10){
        int stateButton = digitalRead(ButtonPin1);  
        if (stateButton == 1)  
        {  
          digitalWrite(GreenLed, LOW); 
        }  
      digitalWrite(GreenLed, HIGH);
      if (toggleBuzzer == HIGH){
        digitalWrite(BuzzerPin, HIGH);
      }
    } else{
      digitalWrite(GreenLed, LOW);
      digitalWrite(BuzzerPin, LOW);

    }
  } else{
    digitalWrite(GreenLed, LOW);
    digitalWrite(BuzzerPin, LOW);
  }
  delay(100);
}
void setup() {
  Serial.begin(9600);
  pinMode(ECHOPIN, INPUT);
  pinMode(TRIGPIN, OUTPUT);
  pinMode(wifiLed, OUTPUT);
  pinMode(GreenLed, OUTPUT);
  pinMode(BuzzerPin, OUTPUT);
  pinMode(ButtonPin1, INPUT);
  digitalWrite(wifiLed, LOW);
  Serial.print("Connectiong to WiFi");
  WiFi.begin(ssid, pass);
  while(WiFi.status() != WL_CONNECTED){
    delay(100);
    Serial.print(".");
  }
  Serial.println(" Connected! ");
  timer.setInterval(2000L, checkBlynkStatus); 
  Blynk.config(auth);
  delay(1000);
 }
 void loop() {
  delay(100);
  measureDistance();
  delay(20);  
  Blynk.run();
  timer.run(); 

   
}