/*
  LCD Display with I2C Interface Demo
  lcd-i2c-demo.ino
  Use NewLiquidCrystal Library
  DroneBot Workshop 2018
  https://dronebotworkshop.com
*/

// Include Wire Library for I2C
#include <Wire.h>
// Include NewLiquidCrystal Library for I2C
#include <LiquidCrystal_I2C.h>

const int i2c_addr = 0x27;

LiquidCrystal_I2C lcd(i2c_addr, 16,2);

void setup()
{

  // Set display type as 16 char, 2 rows
  lcd.begin(16,2);
  
  // Print on first row
  lcd.setCursor(0,0);
  lcd.print("Hello world!");
  
  // Wait 1 second
  delay(1000);
  
  // Print on second row
  lcd.setCursor(0,1);
  lcd.print("How are you?");
  
  // Wait 8 seconds
  delay(8000);
  
  // Clear the display
  lcd.clear();

}


void loop()
{
  
  // Demo 1 - flash backlight
  lcd.setCursor(0,0);
  lcd.print("Backlight demo");
  lcd.setCursor(0,1);
  lcd.print("Flash 4 times");
  
  delay(3000);
  lcd.clear();
  
  // Flash backlight 4 times
  for(int i = 0; i< 4; i++)
    {
    lcd.backlight();
    delay(250);
    lcd.noBacklight();
    delay(250);
    }

  // Turn backlight back on
  lcd.backlight();
    
  // Demo 2 - scroll
  lcd.setCursor(0,0);
  lcd.print("Scroll demo - ");
  delay(1500);
  // set the display to automatically scroll:
  lcd.autoscroll();
  // print from 0 to 9:
  for (int thisChar = 0; thisChar < 10; thisChar++) {
    lcd.print(thisChar);
    delay(500);
    }
  // turn off automatic scrolling
  lcd.noAutoscroll();

  // clear screen 
  lcd.clear();
  
  //Delay
  delay(1000);

}