I2C LCD DISPLAY VERSION 1: Example Software Sketch for 2 line 16 character Displays: (Cut and paste these examples into a blank page on the Arduino IDE). (Details in the document linked at the end of this page, if Usually you will set the cursor position before writingĬharacters. So this is "normal" and has to do with the LCD Line and continue on the third, due to the way the LCD internalĪddressing works. They willĭisplay characters you type on the Serial Monitor screen on the LCD. There are many advanced functions.īelow are Example Software Sketches for different displays. See the "Docs" folder within the Library folder. LiquidCrystal_I2C Library Support Functions See a LCD used in the Temperature-Humidity project. Start clockwise and backĭown to where the characters are bright and the background does not have If you don't see any characters, adjust it. NOTE: The Blue Potentiometer (Photo) adjusts Contrast. SCL (clock line) is on analog input pin 5. On most Arduino boards, SDA (data line) is on analog input pin 4, and It is easiest with a 4-wire cable (supplied) that plugs into the Sensor Shield communications connector.īut you can wire it directly yourself if needed: There are 4 pins on the display. This unit connects with 4 wires including Vcc and Gnd. More information about I2C/TWI (Wikipedia) Your project, this LCD module actually uses no more pins at all. With this I2C interface LCD module, you only need 2 You are doing more than a simple project, you may be out of pins using a Would need 6 pins: RS, EN, D7, D6, D5, and D4 to talk to the LCD. To use this type LCD directly with Arduino, you On Yellow) background: it is difficult to get a good digital photo due NOTE! These displays are very clear bright white on dark blue (or Black LCD Version 3 - Marked "LCM1602 IIC A0 A1 A2" LCD Version 2 - Marked "Arduino-IIC-LCD GY-LCD-V1" LCD Version 1 - Marked "YwRobot Arduino LCM1602 IIC V1" Check the small "backpack" interface board on the back. NOTE! THERE ARE THREE (or More?) VERSIONS OF THE 2 and 4 LINE DISPLAYS. You should download that Library HERE (Click) LCD Displays (Blue and YELLOW) with I2C/TWI InterfaceĪLL the displays will now use the great Library written by F Malpartida.
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