// C++ code
//
/*
  Button
  Turns on and off a light emitting diode(LED)
  connected to digital  pin 13, when pressing a
  pushbutton attached to pin 2.

   The circuit:
  * LED attached from pin 13 to ground
  * pushbutton attached to pin 2 from +5V
  * 10K resistor attached to pin 2 from ground
  * Note: on most Arduinos there is already an LED
  on the board  attached to pin 13.

  created 2005  by DojoDave <http://www.0j0.org>

  modified 30 Aug 2011  by Tom Igoe

  This example code is in the public domain.
  http://www.arduino.cc/en/Tutorial/Button
*/

#include <LiquidCrystal_I2C.h>

int BUT1 = 0;

int BUT2 = 0;

int BUT3 = 0;

int BUT4 = 0;

int BUT5 = 0;

int BUT6 = 0;

int BUT7 = 0;

int BUT8 = 0;

int BUT9 = 0;

int BUT10 = 0;

int VFR = 0;

bool IDENT = 0;

int CLR = 0;

int i = 0;

int LED = 0;

String SQUAWK = "0000";

bool ALTIF = false;

LiquidCrystal_I2C lcd_1(0x27,16,2);

void setup()
{
  // PIN SETTINGS:
  BUT1 = 0;
  BUT2 = 1;
  BUT3 = 2;
  BUT4 = 3;
  BUT5 = 4;
  BUT6 = 5;
  BUT7 = 6;
  BUT8 = 7;
  BUT9 = 8;
  BUT10 = 9;
  IDENT = 10;
  VFR = 11;
  CLR = 12;
  LED = 13;
  pinMode(BUT1, INPUT_PULLUP);
  pinMode(BUT2, INPUT_PULLUP);
  pinMode(BUT3, INPUT_PULLUP);
  pinMode(BUT4, INPUT_PULLUP);
  pinMode(BUT5, INPUT_PULLUP);
  pinMode(BUT6, INPUT_PULLUP);
  pinMode(BUT7, INPUT_PULLUP);
  pinMode(BUT8, INPUT_PULLUP);
  pinMode(BUT9, INPUT_PULLUP);
  pinMode(BUT10, INPUT_PULLUP);
  pinMode(IDENT, INPUT_PULLUP);
  lcd_1.begin(16, 2);
  lcd_1.print("FS TRANSPONDER");
  lcd_1.setCursor(0, 1);
  lcd_1.print("BY BITP");
  digitalWrite(LED, HIGH);
  delay(2000); // Wait for 1000 millisecond(s)
  lcd_1.clear();
}

void loop()
{
  lcd_1.setCursor(0,1);
  for (i=0;i<=10;i=i+1) {
    if (digitalRead(i) == HIGH) {
      lcd_1.print(i);
    }
  }
}