LCD1602 RGB Module

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LCD1602 RGB Module
LCD1602 RGB Module

LCD1602 RGB Module, Adjustable RGB Backlight Color, I2C Communication, 3.3V/5V Compatible
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Overview

Features

  • The I2C interface can be directly controlled with only two wires, which is convenient to connect to various control boards.
  • Incorporates character LCD panel LCD1602.
  • Adjustable RGB backlight color, up to 16M (2563) backlight colors in theory.
  • Can display up to 16 x 2 characters, support screen scrolling, cursor movement, and other functions.
  • Onboard AiP31068L LCD driver chip, PCA9633 RGB control chip.
  • I2C control interface, only two signal pins are required, saving the IO resource.
  • Compatible with 3.3V/5V operating voltage.
  • Comes with online development resources and manual (Raspberry Pi/Jetson Nano/Arduino examples).

Specification

  • Operating voltage: 3.3V/5V
  • Interface: I2C
  • LCD type: character LCD
  • Controller: AiP31068L PCA9633DP2
  • Display: 64.5 x 16.0 mm
  • Dimension: 87.0 × 32.0 × 13.0mm
  • Operating current: 26mA (5V), 13mA (3.3V)

Pinout

PIN Description
VCC 3.3V/5V
GND GND
SDA I2C data pin
SCL I2C clock pin

Working Protocol

LCD1602 RGB Module002.png

Raspberry Pi

Hardware Configuration

Enable I2C interface

  • Open the terminal, and use the command to enter the configuration page.
sudo raspi-config
Choose Interfacing Options -> I2C -> Yes to enable the I2C interface.

RPI open i2c.png

And then reboot the system: 

sudo reboot

Hardware Connection

You can directly attach it to the 40PIN GPIO of Raspberry Pi. Or you can wire it to Raspberry Pi with the PH2.0 4PIN interface of the Module, please refer to the Pin definition below:

LCD Raspberry Pi
BCM2835 Board
VCC 3.3V 3.3V
GND GND GND
SDA SDA.1 3
SCL SCL.1 5

Take the LCD1602 RGB Module as an example, just connect it to the Raspberry Pi. The color of the actual cable may be different from the figure here, please connect them according to the pins instead of color.

LCD1602 RGB Module007.jpg

If you are using Jetson Nano, the connection should be as bellow:

LCD1602 RGB Module012.jpg

Download the demo

Open the terminal of the Raspberry Pi, execute command to download demo codes: 

cd ~
wget https://files.waveshare.com/upload/5/5b/LCD1602-RGB-Module-demo.zip
unzip LCD1602-RGB-Module-demo.zip
cd ~/LCD1602-RGB-Module-demo/Raspberry
sudo chmod 777 *
sudo python Choose_Color.py 
sudo python Discoloration.py

Environment Setting

  1. Click here to see how to set up the Raspberry Pi environment.
  2. Click here to see how to set up the Windows environment.

Pico

Hardware Configuration

LCD PIN Pico
VCC 3.3V
GND GND
SDA GP4
SCL GP5

LCD1602 RGB Module006.jpg

Setup environment

Please refer to Raspberry Pi's guide: https://www.raspberrypi.org/documentation/pico/getting-started/

Raspberry Pi

  1. Log_in_Raspberry_Pi_terminal_by_SSH or press Ctrl+Alt+T at the same time while using the screen to open the terminal.
  2. Download and unzip the program to the Pico C/C++ SDK directory, for those who have not yet installed the SDK, please refer to the tutorial.
#Note that the directory of SDK may be different for different users, you need to check the actual directory. Generally, it should be ~/pico/.
wget  -P ~/pico https://files.waveshare.com/upload/5/5b/LCD1602-RGB-Module-demo.zip
cd ~/pico
unzip LCD1602-RGB-Module-demo.zip

C

  • Hold the BOOTSEL button of Pico, and connect the USB interface of Pico to Raspberry Pi then release the button.
  • Compile and run the LCD1602-RGB-Module-demo examples:
cd ~/pico/LCD1602-RGB-Module-demo/Pico/c/build/
cmake ..
make
sudo mount /dev/sda1 /mnt/pico && sudo cp LCD1602_RGB_Module_demo.uf2 /mnt/pico/ && sudo sync && sudo umount /mnt/pico && sleep 2

python

  • Refer to Raspberry Pi's guides to setup Micropython firmware for Pico.
  • Open the Thonny IDE, and drag the demo to IDE and run on Pico as below. And save RGB1602.py to Pico's file system.

Pico-10DOF-IMU005.jpg

Windows

C

  • Download and unzip the the demo to your Windows desktop, refer to Raspberry Pi's guides to set up the Windows software environment settings.
  • Find the LCD1602-RGB-Module-demo.uf2 file under the build file under the demo directory, press and hold the BOOTSEL button of Pico, connect the USB of Pico to the PC with a MicroUSB cable, and drag the uf2 file into Pico, and then the Pico will run the demo directly.
  • 【Note】 If some users want to modify the demo, after debugging, you can use the following method to generate a .uf2 file:
    • 1. Copy the LCD1602-RGB-Module-demo folder from Pico/c to your pico-examples directory, and then modify the CMakelists.txt configuration file in the pico-example directory as shown in the figure below.
    • 2. Open Visual Studio Code, open your pico-examples folder, select LCD1602_RGB_Module_demo, and click Generate, you can find the LCD1602_RGB_Module_demo.uf2 file in the build folder.

LCD1602 RGB Module010.png

python

  • Download and unzip the demo to your Windows desktop, refer to Raspberry Pi's guides to set up the Windows software environment settings.
  • Open the demo program in Thonnty, as shown in the figure below:

LCD1602 RGB Module004.png

  • Here you also need to save RGB1602.py to PICO, select RGB1602.py, save it as Raspberry pi pico, and name it RGB1602.py.

LCD1602 RGB Module005.png

  • And then run the demo under Choose_Color.py or Discoloration.py.
  • Code analysis

Choose_Color.py

#define color
rgb9 = (0,255,0) #cyan’
lcd.setCursor(0, 0) #Set the cursor position
# print the number of seconds since reset:
lcd.printout("Waveshare") #write characters
lcd.setCursor(0, 1) #Set the cursor position to the second row and the zeroth column
lcd.printout("Hello, World!")#write characters
lcd.setRGB(rgb1[0],rgb1[1],rgb1[2]); #Set the backlight

Discoloration.py

t=0
while True:
 
    r = int((abs(math.sin(3.14*t/180)))*255); #RGB changes over time
    g = int((abs(math.sin(3.14*(t+60)/180)))*255);
    b = int((abs(math.sin(3.14*(t+120)/180)))*255);
    t = t + 3;
    lcd.setRGB(r,g,b);#Reset the value of RGB
# set the cursor to column 0, line 1
    lcd.setCursor(0, 0) #Locate to the first row and the zeroth column
# print the number of seconds since reset:
    lcd.printout("Waveshare")#write characters
    lcd.setCursor(0, 1) #Locate to the second row and the zeroth column
    lcd.printout("Hello, World!")#write characters
    time.sleep(0.3)

Arduino

Hardware connection

LCD PIN Arduino
VCC 3.3V
GND GND
SDA SDA
SCL SCL

The hardware connection as below:

LCD1602 RGB Module003.jpg

Library file loading for Arduino

  • Download the demo from the Resources, there is a Waveshare-LCD1602-RGB-master.zip library file in the Arduino folder.
LCD1602 RGB Module008.png
  • There are two methods to load the library:
    • Method 1: Unzip the entire .zip package to the libraries folder of the Arduino IDE.

LCD1602 RGB Module009.png

    • Method 2: Add this .zip package directly to the Arduino IDE.
      • Open the Arduino IDE -> Choose 'Sketch' in the taskbar -> Choose 'Include Library' -> Add .ZIP library.
      • Find Waveshare-LCD1602-RGB-mater.zip in the demo folder and click to open it.

Resources

Demo

Document

FAQ

Question:When using the Python sample program, why only the second line is displayed but not the first?

 Answer:
It may be a problem of Python firmware incompatibility, you can use the firmware version given by our sample demo.
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Question:Do SDA and SCL of LCD1602 have pull-up resistors?

 Answer:
Yes.
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Question: How I can control 2 of your displays at the same time assuming they can have different I2C addresses? Then what should be the library command to reference I2C address?

 Answer:

The address of the LCD1602 is not able to be changed, in this case, it is not able to use two same displays at the same time for displaying different contents. The provided examples were written for signal devices only, or you need to modify the RGB1802.py, and add the address setting in the init functin.

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Question:I cannot display the text on the right column. when using a Raspberry Pi Pico kit with the LCD 1602 RGB Module. Instead of having "waveshare" displayed on the top line and then "Hello, World!" displayed on the second line of the LCD screen, all I get is "wHello, World!" displayed on 1 line. What's wrong with it?
LCD1602 RGB Module-faq01.jpg

 Answer:

The problem maybe caused by the firmware. Please use the attached firmware and test it again.
LCD1602 rp2-pico-20220117-v1.18

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Question: I am looking for part numbers for the connector?

 Answer:

The Connector is PH2.0 4PIn connector.

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