// Arduino LCD 16x2 Shield

// include the library
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
// initialize the LCD display
LiquidCrystal_I2C lcd(0x27, 16, 2);
// setting the pin number
// for the LCD display backlight

unsigned long currentTime;
unsigned long previousTime = millis();
long timeInterval = 10000;

void setup() {
  // start communication with the display,
  // 16 characters, 2 rows
  lcd.init();
  // set the pin for controlling the backlight as output
  lcd.backlight();
  lcd.clear();
  //lcd.setCursor(0,0);
  //lcd.print("^ - AUTOMATIC");
  //lcd.setCursor(0,1);
  //lcd.print("v - BACK TO MANUAL");
}

void loop() {

  currentTime = millis();

  if(currentTime - previousTime > timeInterval) {
    lcd.noBacklight();
  }
  // read data from analog pin A0 into the variable
  int analogData = analogRead(0);

  // turn on the display backlight
  //digitalWrite(lcdSvit, HIGH);
  // set cursor to the first character, first row
  lcd.setCursor(0, 0);
  // print text to the display
  lcd.print("Pressed:      ");
  // set cursor to the thirteenth character, first row
  lcd.setCursor(12, 0);
  // print text to the display
  lcd.print(analogData);
  // set cursor to the third character, second row
  lcd.setCursor(2, 1);
  // print text to the display using the function
  // with the currently measured value as an argument
  lcd.print(readButtons(analogData));
  // pause to read the data on the display
  //delay(1000);
  // turn off the display backlight
  //digitalWrite(lcdSvit, LOW);
  // pause before the end of the loop
  //delay(100);
}

String readButtons(int analog) {
  // variable to store the text for output
  String text;
  // sequentially check using if conditions,
  // each button has a range of values
  // in which it is detected and then sets the text for output
  if (analog < 750) {
    previousTime = currentTime;
    lcd.backlight();
  }
  if (analog < 50) text = "Right(RIGHT)";
  if ((analog > 700) && (analog < 1024)) text = "             ";
  if ((analog > 95) && (analog < 150)) text = "Up(UP)";
  if ((analog > 250) && (analog < 350)) text = "Down(DOWN)";
  if ((analog > 400) && (analog < 500)) text = "Left(LEFT)";
  if ((analog > 600) && (analog < 750)) text = "Select(SELECT)";
  // return the text as the function output
  return text;
}