#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

// Potentiometer pins
const int thumbPin  = A0;
const int indexPin  = A1;
const int middlePin = A2;
const int ringPin   = A3;
const int littlePin = A6;

void setup() {
  lcd.init();
  lcd.backlight();

  Serial.begin(9600);

  lcd.setCursor(0, 0);
  lcd.print("Sign Glove");
  delay(2000);
  lcd.clear();
}

void loop() {

  int thumb  = analogRead(thumbPin);
  int index  = analogRead(indexPin);
  int middle = analogRead(middlePin);
  int ring   = analogRead(ringPin);
  int little = analogRead(littlePin);

  // Print values on Serial Monitor
  Serial.print(thumb);
  Serial.print(" hi");
  Serial.print(index);
  Serial.print("water ");
  Serial.print(middle);
  Serial.print(" food");
  Serial.print(ring);
  Serial.print("help ");
  Serial.println(little);
  Serial.print("bye");

  lcd.clear();

  // -------- Sample Sign Detection --------

  // A
  if (thumb > 700 &&
      index < 400 &&
      middle < 400 &&
      ring < 400 &&
      little < 400)
  {
    lcd.print("SIGN : A");
  }

  // B
  else if (thumb < 400 &&
           index > 700 &&
           middle > 700 &&
           ring > 700 &&
           little > 700)
  {
    lcd.print("SIGN : B");
  }

  // C
  else if (thumb > 450 && thumb < 650 &&
           index > 450 && index < 650 &&
           middle > 450 && middle < 650 &&
           ring > 450 && ring < 650 &&
           little > 450 && little < 650)
  {
    lcd.print("SIGN : C");
  }

  // D
  else if (thumb < 400 &&
           index > 700 &&
           middle < 400 &&
           ring < 400 &&
           little < 400)
  {
    lcd.print("SIGN : D");
  }

  // Unknown
  else
  {
    lcd.print("Unknown Sign");
  }

  delay(300);
}