/*
LCD_Test
Tests an I2C LCD 16x02
Wiring :
LCD           ESP32
GND ----->     GND
VCC ----->     Vin (5V)
SDA ----->     GPIO 21
SCL ----->     GPIO 22

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*/

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);
char c[16] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};

void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
}

void loop() {
  lcd.clear();
  lcd.setCursor(0, 0);
  Serial.println("LCD Test By O-Tech");
  lcd.print("    LCD Test    ");
  lcd.setCursor(0, 1);
  lcd.print("    By O-Tech  ");
  delay(2000);
  lcd.clear();
  lcd.setCursor(0, 0);
  Serial.println("Testing line 1");
  for(int i = 0; i <= 15; i++){
    lcd.print(c[i]);
    delay(100);
  }
  lcd.setCursor(0, 1);
  Serial.println("Testing line 2");
  for(int i = 15; i >= 0; i--){
    lcd.print(c[i]);
    delay(100);
  }
  delay(1000);
}