Arduino – I2C 20 X 4 LCD Display - Eli The Computer Guy

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I2C Control Boards allow you to connect an LCD Display to your Arduino using only 4 wires.

Note: I2C is an Addressable Communication Protocol. 0x27 should be the default address of the display. If this does not work you will have to find the address by running a sketch designed to find I2C address on an Arduino: https://playground.arduino.cc/Main/I2cScanner/

Links:

  • New Liquid Crystal Library – https://bitbucket.org/fmalpartida/new-liquidcrystal/wiki/Home
  • Liquid Crystal I2C Library – https://www.arduinolibraries.info/libraries/liquid-crystal-i2-c

Functional Parts in the Project:

  • Arduino Uno – https://store.arduino.cc/usa/arduino-uno-rev3
  • 20 x 4 I2C LCD Screen – https://amzn.to/2JVuKzn
  • 560 Piece Jumper Wire Kit – https://amzn.to/2MsCLjL
#include <Wire.h> #include <LCD.h> #include <LiquidCrystal_I2C.h> LiquidCrystal_I2C lcd(0x27,2,1,0,4,5,6,7); void setup() { lcd.begin(20,4); lcd.setBacklightPin(3,POSITIVE); lcd.setBacklight(HIGH); lcd.setCursor(0,0); lcd.print("Hello, World!"); lcd.setCursor(0,1); lcd.print("This is:"); lcd.setCursor(0,2); lcd.print("An I2C Display"); lcd.setCursor(4,3); lcd.print("Kinda Cool..."); } void loop() { }
  • Arduino
  • I2C
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