When a character is printed, the cursor position is updated to the next position automatically (either left or right depending on the settings). Starts printing at the current cursor position. Print characters or numbers to the screen. When the screen is first initialized the cursor position is set to 0,0.Ĭlear the screen and set the cursor position to 0,0 Initialize the screen and specify the size. Used with the NewLiquidCrystal library to create an instance of an I2C LCD object. Separate LiquidCystal instances will need to be created and different pins will be to be specified for each screen.

When 8 pins are specified (D0 – D7) the library uses 8bit mode.Īs long as you have available pins, you can connect more than 1 screen. When only 4 data pins are specified (D4 – D7) the library uses 4bit mode. LiquidCrystal lcd(RS, Enable, D0, D1, D2, D3, D4, D5, D6, D7)Ĭreate a instance of the lcd object and tell the library what pins to use. LiquidCrystal lcd(RS, Enable, D4, D5, D6, D7) For example LiquidCrystal lcd(12, 11, 5, 4, 3, 2) LiquidCrystal The following command examples assume the lcd object has been called lcd. If the Arduino IDE is open you will need to restart it to make the new library accessible. Then copy the NewLiquidCrytal library to the Arduino library folder Go to your Arduino library folder and delete the default LiquidCrystal library From inside the zip archive extract the NewLiquidCrystal folder Which at the time of writing this update is 1.3.4. On the download page, download the latest version. NewLiquidCrystal is a replacement for the default library so the default library has to be removed from the Arduino’s libraries folder.Įxtensible hd44780 LCD library is still fairly new but seems to work well.įrom the main wiki page click the Download link. It has a number of benefits over the default library, including the ability to handle screens with an I2C adapter. NewLiquidCrystal is a collection of libraries that can handle almost all HD44780 compatible displays.

The two I use and recommend are NewLiquidCrystal by Francisco Malpartida and Bill Perry’s Extensible hd44780 LCD library. There are various other Character LCD libraries available. This works with parallel interfaces only. The Arduino IDE comes with a basic LiquidCrystal library pre installed. On the downside, when different libraries try to use the same resources it can be very difficult to find the problem. The library happily does all of this for us. A key benefit of using a library is that we do not need to care that much about the technical details or timings when using the display.

Arduino lcd library circuit