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1.1.6 I2C LCD1602

Introduction

LCD1602 is a character type liquid crystal display, which can display 32 (16*2) characters at the same time.

Components

../_images/list_i2c_lcd.png

Schematic Diagram

T-Board Name

physical

SDA1

Pin 3

SCL1

Pin 5
../_images/schematic_i2c_lcd.png

Experimental Procedures

Step 1: Build the circuit.

../_images/image96.png

Step 2: Setup I2C (see I²C Configuration. If you have set I2C, skip this step.)

Step 3: Go to the folder of the code.

cd ~/davinci-kit-for-raspberry-pi/nodejs/

Step 4: Install dependencies.

sudo npm install @oawu/lcd1602

Step 5: Run the code.

sudo node i2c_lcd1602.js

After the code runs, you can see Greetings!!, From SunFounder displaying on the LCD.

Code

const LCD = require('@oawu/lcd1602');
const lcd = new LCD();

lcd.text(0, 0, 'Greetings!!');
lcd.text(1, 1, 'from SunFounder');

Code Explanation

const LCD = require('@oawu/lcd1602');
const lcd = new LCD();

Import the lcd1602 module and represent it with lcd.

Note

For the lcd1602 module, please refer to: https://www.npmjs.com/package/@oawu/lcd1602

lcd.text(0, 0, 'Greetings!!');
lcd.text(1, 1, 'from SunFounder');

Calling the encapsulated text() function in the LCD class can make the lcd1602 display the text we want.

The text() function receives three parameters, the first parameter is the line of lcd1602, the second parameter represents the position of the displayed text, and the third parameter represents the text we want to display.

The 1602 number in the LCD model means it has 2 rows of 16 cells each.

Phenomenon Picture

../_images/image97.jpeg