#include <toneAC.h>
#include <LiquidCrystal_I2C.h> //library
#include <Wire.h>
#define BACKLIGHT_PIN     13 //backlight pin

LiquidCrystal_I2C lcd(0x3f, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
//use for 0x2 7
//LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);


unsigned long debounceDelay = 50;
int threshold = 0;
int count = 0;

#define buttonPin1 2
int buttonState1;
int lastButtonState1 = LOW;
unsigned long lastDebounceTime1 = 0;

#define buttonPin2 3
int buttonState2;
int lastButtonState2 = LOW;
unsigned long lastDebounceTime2 = 0;

#define buttonPin3 4
int buttonState3;
int lastButtonState3 = LOW;
unsigned long lastDebounceTime3 = 0;

#define buttonPin4 5
int buttonState4;
int lastButtonState4 = LOW;
unsigned long lastDebounceTime4 = 0;

#define buttonPin5 6
int buttonState5;
int lastButtonState5 = LOW;
unsigned long lastDebounceTime5 = 0;

#define buttonPin6 7
int buttonState6;
int lastButtonState6 = LOW;
unsigned long lastDebounceTime6 = 0;

#define buttonPin7 8
int buttonState7;
int lastButtonState7 = LOW;
unsigned long lastDebounceTime7 = 0;


#define buttonPin8 9
int buttonState8;
int lastButtonState8 = LOW;
unsigned long lastDebounceTime8 = 0;

#define buttonPin9 10
int buttonState9;
int lastButtonState9 = LOW;
unsigned long lastDebounceTime9 = 0;

#define buttonPin10 11
int buttonState10;
int lastButtonState10 = LOW;
unsigned long lastDebounceTime10 = 0;


void setup()
{
  Serial.begin(9600);
  pinMode(buttonPin1, INPUT_PULLUP);
  pinMode(buttonPin2, INPUT_PULLUP);
  pinMode(buttonPin3, INPUT_PULLUP);
  pinMode(buttonPin4, INPUT_PULLUP);
  pinMode(buttonPin5, INPUT_PULLUP);
  pinMode(buttonPin6, INPUT_PULLUP);
  pinMode(buttonPin7, INPUT_PULLUP);
  pinMode(buttonPin8, INPUT_PULLUP);
  pinMode(buttonPin9, INPUT_PULLUP);
  pinMode(buttonPin10, INPUT_PULLUP);

}

void loop() {
  readBtn1();
  readBtn3();
  readBtn2();
  readBtn4();
  readBtn5();
  readBtn6();
  readBtn7();
  readBtn8();
  readBtn9();
  readBtn10();

  booleanCheck();
  Serial.println(threshold);
}

void readBtn1() {
  int reading = digitalRead(buttonPin1);
  if (reading != lastButtonState1) {
    lastDebounceTime1 = millis();
  }
  if ((millis() - lastDebounceTime1) > debounceDelay) {
    if (reading != buttonState1) {
      buttonState1 = reading;
      if (buttonState1 == LOW) {
        count = 1;
      }
    }
  }
  lastButtonState1 = reading;
}

void readBtn2() {
  int reading = digitalRead(buttonPin2);
  if (reading != lastButtonState2) {
    lastDebounceTime2 = millis();
  }
  if ((millis() - lastDebounceTime2) > debounceDelay) {
    if (reading != buttonState2) {
      buttonState2 = reading;
      if (buttonState2 == LOW) {
        count = 2;
      }
    }
  }
  lastButtonState2 = reading;
}

void readBtn3() {
  int reading = digitalRead(buttonPin3);
  if (reading != lastButtonState3) {
    lastDebounceTime3 = millis();
  }
  if ((millis() - lastDebounceTime3) > debounceDelay) {
    if (reading != buttonState3) {
      buttonState3 = reading;
      if (buttonState3 == LOW) {
        count = 3;
      }
    }
  }
  lastButtonState3 = reading;
}

void readBtn4() {
  int reading = digitalRead(buttonPin4);
  if (reading != lastButtonState4) {
    lastDebounceTime4 = millis();
  }
  if ((millis() - lastDebounceTime4) > debounceDelay) {
    if (reading != buttonState4) {
      buttonState4 = reading;
      if (buttonState4 == LOW) {
        count = 4;
      }
    }
  }
  lastButtonState4 = reading;
}

void readBtn5() {
  int reading = digitalRead(buttonPin5);
  if (reading != lastButtonState5) {
    lastDebounceTime5 = millis();
  }
  if ((millis() - lastDebounceTime5) > debounceDelay) {
    if (reading != buttonState5) {
      buttonState5 = reading;
      if (buttonState5 == LOW) {
        count = 5;
      }
    }
  }
  lastButtonState5 = reading;
}

void readBtn6() {
  int reading = digitalRead(buttonPin6);
  if (reading != lastButtonState6) {
    lastDebounceTime6 = millis();
  }
  if ((millis() - lastDebounceTime6) > debounceDelay) {
    if (reading != buttonState6) {
      buttonState6 = reading;
      if (buttonState6 == LOW) {
        count = 6;
      }
    }
  }
  lastButtonState6 = reading;
}

void readBtn7() {
  int reading = digitalRead(buttonPin7);
  if (reading != lastButtonState7) {
    lastDebounceTime7 = millis();
  }
  if ((millis() - lastDebounceTime7) > debounceDelay) {
    if (reading != buttonState7) {
      buttonState7 = reading;
      if (buttonState7 == LOW) {
        count = 7;
      }
    }
  }
  lastButtonState7 = reading;
}

void readBtn8() {
  int reading = digitalRead(buttonPin8);
  if (reading != lastButtonState8) {
    lastDebounceTime8 = millis();
  }
  if ((millis() - lastDebounceTime8) > debounceDelay) {
    if (reading != buttonState8) {
      buttonState8 = reading;
      if (buttonState8 == LOW) {
        count = 8;
      }
    }
  }
  lastButtonState8 = reading;
}

void readBtn9() {
  int reading = digitalRead(buttonPin9);
  if (reading != lastButtonState9) {
    lastDebounceTime9 = millis();
  }
  if ((millis() - lastDebounceTime9) > debounceDelay) {
    if (reading != buttonState9) {
      buttonState9 = reading;
      if (buttonState9 == LOW) {
        count = 9;
      }
    }
  }
  lastButtonState9 = reading;
}

void readBtn10() {
  int reading = digitalRead(buttonPin10);
  if (reading != lastButtonState10) {
    lastDebounceTime10 = millis();
  }
  if ((millis() - lastDebounceTime10) > debounceDelay) {
    if (reading != buttonState10) {
      buttonState10 = reading;
      if (buttonState10 == LOW) {
        count = 10;
      }
    }
  }
  lastButtonState10 = reading;
}


void booleanCheck()
{
  lcd.setCursor(0, 0);
  lcd.print(F("Button Pressed"));
  lcd.setCursor(0, 1);

  switch (count)
  {
    case 0:
      threshold = 0;
      lcd.print(F("Nothing pressed"));
      break;

    case 1:
      threshold = 10;
      lcd.print(F("10hz pressed"));
      break;

    case 2:
      threshold = 20;
      lcd.print(F("20hz pressed"));
      break;

    case 3:
      threshold = 50;
      lcd.print(F("50hz pressed"));
      break;

    case 4:
      threshold = 100;
      lcd.print(F("100hz pressed"));
      break;

    case 5:
      threshold = 200;
      lcd.print(F("200hz pressed"));
      break;

    case 6:
      threshold = 500;
      lcd.print(F("500hz pressed"));
      break;

    case 7:
      threshold = 1000;
      lcd.print(F("20hz pressed"));
      break;

    case 8:
      threshold = 1500;
      lcd.print(F("1500hz pressed"));
      break;

    case 9:
      threshold = 2000;
      lcd.print(F("2000hz pressed"));
      break;

    case 10:
      threshold = 2500;
      lcd.print(F("2500hz pressed"));
      break;
  }

}