Character LCD Displays are a very commonly used for Arduino projects, to display small amounts of textual information. The most common types are the basic directly connected displays, and the ones with I2C adapter. The I2C version is more expensive but needs only 4 wires to connect to Arduino, which makes it very attractive, and easy to use option for Arduino projects.
In a following Instructable, I will also show you how you can connect LCD Display directly to Arduino without using I2C adapter.
Step 1: Components
Step 2: Connect the LCD Display to Arduino
- Connect Ground(Black wire), Power(Red wire), SDA(Green wire), and SCL(Yellow wire) to the LCD Module (Picture 1)
- Connect the other end of the Power wire(Red wire) to the 5V power pin of the Arduino board(Picture 2)
- Connect the other end of the Ground wire(Black wire) to Ground pin of the Arduino board(Picture 2)
- Connect the SDA wire(Green wire) to SDA/Analog pin 4 of the Arduino Nano board(Picture 2)
- Connect the SCL wire(Yellow wire) to SCL/Analog pin 5 of the Arduino Nano board(Picture 2)
- Picture 3 shows where are the Ground, 5V Power, SDA/Analog pin 4, and SCL/Analog pin 5 pins of the Arduino Nano
Step 3: Start Visuino, and Select the Arduino Board Type
To start programming the Arduino, you will need to have the Arduino IDE installed from here: http://www.arduino.cc/ .
Please be aware that there are some critical bugs in Arduino IDE 1.6.6.
Make sure that you install 1.6.7 or higher, otherwise this Instructable will not work!
Step 4: In Visuino: Add LCD Component, and Connect It
- Type "lcd" in the Filter box of the Component Toolbox then select the "Liquid Crystal Display (LCD) - I2C" component (Picture 1), and drop it in the design area
- Connect the "Out" pin of the LCD component to the to the "In" pin of the I2C channel of the Arduino component (Picture 2)
- Connect the "Out" pin of the "Serial[ 0 ]" channel of the Arduino component(Picture 3) to the "In" pin of the LCD component (Picture 4)
Step 5: Generate, Compile, and Upload the Arduino Code
- In Visuino, Press F9 or click on the button shown on Picture 1 to generate the Arduino code, and open the Arduino IDE
- In the Arduino IDE, click on the Upload button, to compile and upload the code (Picture 2)
Step 6: And Play...
Congratulations! You have completed the project.
Picture 1 shows the connected and powered up project.
If you open Serial Terminal in the Arduino IDE or Visuino, type some text and press Enter, you should see the text appearing on the LCD.
Avoid entering lines of text of more characters than the LCD has per line, as you can overflow its buffers.
On Picture 3 you can see the complete Visuino diagram.