Other Arduino Codes and Videos by Robojax
In this page we have got two Arduino sketch. There are various code to display data on LCD2004-I2C.
You need to download the Liquid Crystal library.
This code prints simple Hello World text on screen
/*
* Download library: https://github.com/fdebrabander/Arduino-LiquidCrystal-I2C-library
*
* Updated by Ahmad Shamshiri on July 08, 2018 at 19:14 in Ajax, Ontario, Canada
* for Robojax.com
* Get this code from Robojax.com
* Watch video instruction for this code at:https://youtu.be/DKmNSCMPDjE
*
*/
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
// Set the LCD address to 0x27 for a 20 chars and 4 line display
LiquidCrystal_I2C lcd(0x27, 20, 4);
void setup()
{
// initialize the LCD
lcd.begin();
// Turn on the blacklight and print a message.
lcd.backlight();
lcd.print("Hello, world!");
}
void loop()
{
// Do nothing here...
}
This code prints values from variable or sensors with texts on the same line or in multiple lines.
/*
*
* * Download library: https://github.com/fdebrabander/Arduino-LiquidCrystal-I2C-library
* This code is basic usage of LCD2004 display with I2C
* It will display text in 4 lines each with 20 characters
* It Displays multiple float values and text on the same line
*
*
*
* Updated by Ahmad Shamshiri on July 08, 2018 at 09:20 in Ajax, Ontario, Canada
* for Robojax.com
* Get this code from Robojax.com
* Watch video instruction for this code at:https://youtu.be/DKmNSCMPDjE
*
*/
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
// Set the LCD address to 0x27 for a 20 chars and 4 line display
LiquidCrystal_I2C lcd(0x27, 20, 4);
void setup() {
// initialize the LCD,
lcd.begin();
// Turn on the blacklight and print a message.
lcd.backlight();
lcd.clear();
lcd.setCursor (0,0); //
lcd.print("Robojax LCD2004 Test");
lcd.setCursor (0,1); //
lcd.print("Please Wait - 3");
lcd.setCursor (0,1); //
delay(1000);
lcd.print("Please Wait - 2");
delay(1000);
lcd.setCursor (0,1); //
lcd.print("Please Wait - 1");
delay(1000);
}
void loop() {
// Robojax.com LCD2004 with I2C custom code
lcd.clear();// clearn previous values from screen
lcd.setCursor (0,0); //character zero, line 1
lcd.print("LCD2004 I2C Example"); // print text
lcd.setCursor (4,1); //character 4, line 2
lcd.print("Robojax.com"); // print text
lcd.setCursor (0,2); //character 0, line 3
lcd.print("Voltage: "); // print text
float v = 8.254;// define or get voltage
char VoltageStr[5];
dtostrf(v, 5, 3, VoltageStr );
lcd.setCursor (9,2); //character 9, line 3
lcd.print(VoltageStr); // print voltage
lcd.setCursor (14,2); //character 14, line 3
lcd.print("V"); // print V at the end of voltage
lcd.setCursor (0,3); //character 0, line 4
lcd.print("X: "); // print x
float xdeg = -123.87;// define or get x degree (just example)
lcd.setCursor (3,3); //character 8, line 3
lcd.print(xdeg); // print xdeg value
lcd.setCursor (12,3); //character 12, line 4
lcd.print("Y: "); // print Y
float ydeg = 32.8;// define or get y degree (just example)
lcd.setCursor (15,3); //character 15, line 4
lcd.print(ydeg); // print ydeg value
delay(100);
}// loop end
This code will display blinking cursor on the screen.
/*
*
* Download library: https://github.com/fdebrabander/Arduino-LiquidCrystal-I2C-library
* This code is basic usage of LCD2004 display with I2C
* It will display blinking cursor on screen
*
* Get this code from Robojax.com
* Watch video instruction for this code at:https://youtu.be/DKmNSCMPDjE
*
*/
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
// Set the LCD address to 0x27 for a 20 chars and 4 line display
LiquidCrystal_I2C lcd(0x27, 20, 4);
void setup()
{
// initialize the LCD
lcd.begin();
}
void loop()
{
bool blinking = true;
lcd.cursor();
while (1) {
if (blinking) {
lcd.clear();
lcd.print("No cursor blink");
lcd.noBlink();
blinking = false;
} else {
lcd.clear();
lcd.setCursor(0,1);
lcd.print("Your name: ");
lcd.blink();
blinking = true;
}
delay(4000);
}
}
This code prints characters you type on the serial monitor.
/*
*
* Download library: https://github.com/fdebrabander/Arduino-LiquidCrystal-I2C-library
* This code is basic usage of LCD2004 display with I2C
* It code will allow you to enter character on the serial monitor and display it on this screen
*
* Updated by Ahmad Shamshiri on July 08, 2018 at 09:20 in Ajax, Ontario, Canada
* for Robojax.com
* Get this code from Robojax.com
* Watch video instruction for this code at:https://youtu.be/DKmNSCMPDjE
*
*/
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
// Set the LCD address to 0x27 for a 20 chars and 4 line display
LiquidCrystal_I2C lcd(0x27, 20, 04);
char lastChar ='_';
void setup()
{
lcd.begin();
lcd.backlight();
lcd.print("Robojax.com Test");
// Initialize the serial port at a speed of 9600 baud
Serial.begin(9600);
}
void loop()
{
lcd.clear();
lcd.setCursor(0,1);
lcd.print("Enter Letter: ");
lcd.setCursor(13,1);
// If characters arrived over the serial port...
if (Serial.available()) {
// Wait a bit for the entire message to arrive
delay(100);
// Write all characters received with the serial port to the LCD.
while (Serial.available() > 0) {
lastChar =Serial.read();
Serial.print("Entered: ");
Serial.println(lastChar);
}//while end
}// if end
lcd.write(lastChar);// display last entered character
delay(1000);
}// loop end
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