ARDUINO LCD ADAPTOR I2C

DESCRIPTION:

This is an 16×2 LCD display screen with I2C interface. It is able to display 16×2 characters on 2 lines, white characters on blue background.

Usually, Arduino LCD display projects will run out of pin resources easily, especially with Arduino Uno. And it is also very complicated with the wire soldering and connection.

This I2C 16×2 Arduino LCD Screen is using an I2C communication interface. It means it only needs 4 pins for the LCD display: VCC, GND, SDA, SCL. It will saves at least 4 digital / analog pins on Arduino. All connector are standard XH2.54 (Breadboard type). You can connect with jumper wire directly.

Features:

• Compatible with Arduino 4 line control module.
• You can use the Arduino official Library directly.
• With backlights and contrast regulator potentiometers.
• Support I2C protocol.
• Dimension: 23 x 41 mm
• Charging voltage: 5v

I2C Address Scanner Code:

// I2C Scanner
// Written by Nick Gammon
// Date: 20th April 2011

#include <Wire.h>

void setup() {
  Serial.begin (9600);
  Serial.println ("I2C scanner. Scanning ...");
  byte count = 0;
  
  Wire.begin();
  for (byte i = 8; i < 120; i++)
  {
    Wire.beginTransmission (i);
    if (Wire.endTransmission () == 0)
      {
      Serial.print ("Found address: ");
      Serial.print (i, DEC);
      Serial.print (" (0x");
      Serial.print (i, HEX);
      Serial.println (")");
      count++;
      delay (1);  // maybe unneeded?
      } // end of good response
  } // end of for loop
  Serial.println ("Done.");
  Serial.print ("Found ");
  Serial.print (count, DEC);
  Serial.println (" device(s).");
}  // end of setup

void loop() {}

The code

/* I2C LCD 16x2 Arduino Tutorial
 * More info http://www.ardumotive.com/i2clcd(en).html
 * Dev: Michalis Vasilakis Date: 19/11/2016 Ver. 1.0 */

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

LiquidCrystal_I2C lcd(0x3F, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);  // Set the LCD I2C address, if it's not working try 0x27.

void setup(){
  lcd.begin(16,2);   // iInit the LCD for 16 chars 2 lines
  lcd.backlight();   // Turn on the backligt (try lcd.noBaklight() to turn it off)
  lcd.setCursor(0,0); //First line
  lcd.print("I2C LCD Tutorial");
  lcd.setCursor(0,1); //Second line
  lcd.print("*ONLINE-COMPONENTS*");
}

void loop(){
}