Arduino Serial Lcd

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16x2 Lcd 4 Pin
Arduino Serial Lcd Sketch

Nov 06, 2018 In this Arduino LCD tutorial, I will take you through the steps to connecting a simple 16×2 LCD up to the Arduino. There is a ton that you’re able to do with an LCD (liquid crystal display), so it’s a useful little device to learn how to connect and communicate with. You will find that most LCD. How to use a 16×2 character LCD with Arduino; If you look closely at the LCD, you can see the small rectangles that form the individual characters of the LCD. Each rectangle is made up of a grid of 5×8 pixels. Later in this tutorial, I will show you how you can control the individual pixels to display custom characters on the LCD. Qunqi 4Packs IIC I2C TWI 1602 Serial Blue LCD Module Board for Arduino UNO R3 MEGA2560. 4.0 out of 5 stars 1. Get it as soon as Mon, Aug 26. FREE Shipping on orders over $25 shipped by Amazon. JANSANE 16x2 1602 LCD Arduino Display Screen Blue + IIC I2C Module Interface Adapter Arduino Uno Raspberry pi 2 Pack.

Serial Input

The Liquid Crystal Library allows you to control LCD displays that are compatible with the Hitachi HD44780 driver. There are many of them out there, and you can usually tell them by the 16-pin interface.

This example sketch accepts serial input from a host computer and displays it on the LCD. To use it, upload the sketch, then open the Serial Monitor and type some characters and click Send. The text will appear on your LCD.

Hardware Required

Arduino or Genuino Board
LCD Screen (compatible with Hitachi HD44780 driver)
pin headers to solder to the LCD display pins
10k ohm potentiometer
220 ohm resistor
hook-up wires
breadboard

Software

A computer running the Arduino Software (IDE)

Circuit

Before wiring the LCD screen to your Arduino or Genuino board we suggest to solder a pin header strip to the 14 (or 16) pin count connector of the LCD screen, as you can see in the image above.
To wire your LCD screen to your board, connect the following pins:

LCD RS pin to digital pin 12
LCD Enable pin to digital pin 11
LCD D4 pin to digital pin 5
LCD D5 pin to digital pin 4
LCD D6 pin to digital pin 3
LCD D7 pin to digital pin 2

16x2 Lcd 4 Pin

Additionally, wire a 10k pot to +5V and GND, with it's wiper (output) to LCD screens VO pin (pin3). A 220 ohm resistor is used to power the backlight of the display, usually on pin 15 and 16 of the LCD connector

click the images to enlarge

image developed using Fritzing. For more circuit examples, see the Fritzing project page

Schematic

click the images to enlarge

image developed using Fritzing. For more circuit examples, see the Fritzing project page

Code

You need to connect the board to your computer and use the Arduino Software (IDE) serial monitor to communicate with it.

/*
LiquidCrystal Library - Serial Input
Demonstrates the use a 16x2 LCD display. The LiquidCrystal
library works with all LCD displays that are compatible with the
Hitachi HD44780 driver. There are many of them out there, and you
can usually tell them by the 16-pin interface.
This sketch displays text sent over the serial port
(e.g. from the Serial Monitor) on an attached LCD.
The circuit:
* LCD RS pin to digital pin 12
* LCD Enable pin to digital pin 11
* LCD D4 pin to digital pin 5
* LCD D5 pin to digital pin 4
* LCD D6 pin to digital pin 3
* LCD D7 pin to digital pin 2
* LCD R/W pin to ground
* 10K resistor:
* ends to +5V and ground
* wiper to LCD VO pin (pin 3)
Library originally added 18 Apr 2008
by David A. Mellis
library modified 5 Jul 2009
by Limor Fried (http://www.ladyada.net)
example added 9 Jul 2009
by Tom Igoe
modified 22 Nov 2010
by Tom Igoe
modified 7 Nov 2016
by Arturo Guadalupi
This example code is in the public domain.
http://www.arduino.cc/en/Tutorial/LiquidCrystalSerialDisplay
*/
// include the library code:
#include <LiquidCrystal.h>
// initialize the library by associating any needed LCD interface pin
// with the arduino pin number it is connected to
const int rs =12, en =11, d4 =5, d5 =4, d6 =3, d7 =2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
voidsetup(){
// set up the LCD's number of columns and rows:
lcd.begin(16,2);
// initialize the serial communications:
Serial.begin(9600);
}
voidloop(){
// when characters arrive over the serial port..
if(Serial.available()){
// wait a bit for the entire message to arrive
delay(100);
// clear the screen
lcd.clear();
// read all the available characters
while(Serial.available()>0){
// display each character to the LCD
lcd.write(Serial.read());
}
}
}