In the setup() the LCD is initiated with the function begin(cols,rows). You will need to change ‘lcd’ to the new name in the rest of the sketch. You can give it a different name if you want like ‘menu_display’. Note that we have called the display ‘lcd’. As parameters we use the Arduino pins to which we connected the display. The is done with the function LiquidCrystal(rs, enable, d4, d5, d6, d7). You should see the following output on the LCD:Īfter including the library, the next step is to create a new instance of the LiquidCrystal class. This library is here to try and simplify the LCD menu but still giving control to. sometimes most of the bugs are from the menu. It always takes too long to implement and debug.
Set the cursor on the third column and the second row: Menu Systems on an LCD has always been a thing that has gotten in the way of developing software for robots and machines. Set the cursor on the third column and the first row, counting starts at 0:
Specify the LCD's number of columns and rows. LiquidCrystal lcd = LiquidCrystal(2, 3, 4, 5, 6, 7) * Basic Arduino example code for displaying text on 16x2, 20x4 etc. Next, I will show you how the code works and how you can use the other functions of the LiquidCrystal library.
The example code below shows you how to display a message on the LCD. The LiquidCrystal library comes with many built-in functions and makes controlling character LCDs super easy. You can check the datasheet for the maximum current rating of the backlight and use this to select an appropriate resistor value. If your display doesn’t include a resistor, you will need to add one between 5 V and pin 15. It should be safe to use a 220Ω resistor, but this value might make your display a bit dim. You should find it on the back of the LCD connected to pin 15 (Anode). Most LCDs have a built-in series resistor for the LED backlight. In order to test the display, you will need to make the connections as shown in the figure below. You will only need to change the size specifications in your Arduino code. These LCDs are available in many different sizes (16×2 1602, 20×4 2004, 16×1 etc.), but they all use the same HD44780 parallel interface LCD controller chip from Hitachi. is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to products on.