Library And Arduino Code For LCD2004 Display With I2C - Robojax

Library and Arduino code for LCD2004 display with I2C

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Arduino code for LCD2004 with I2C module

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.

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Arduino Code for LCD2004 with I2C Hello World sketch

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... }

Arduino Code for LCD2004 with I2C Robojax Custom sketch

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

Arduino Code for LCD2004 with I2C Blinking sketch

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); } }

Arduino Code for LCD2004 with I2C Serial monitor sketch

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