raspberry pi rgb 1602 lcd module free sample

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

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

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.

1. Copy LCD1602-RGB-Module-demo folder to your pico-examples file 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, click Generate, you can find the LCD1602_RGB_Module_demo.uf2 file in the build folder.

LCD1602 RGB ModuleIncorporates character LCD panel LCD1602, onboard AiP31068L LCD driver chip and PCA9633 RGB control chip, supports Raspberry Pi / Pi Pico, Jetson Nano, and Arduino^^16x2 Characters 1602 LCDIncorporates character LCD panel LCD1602, can display up to 16 X 2 characters, support screen scrolling, cursor movement and other functions^^Adjustable RGB Backlight ColorUp to 16M (2563) backlight colors available^^I2C Control InterfaceOnly two signal pins are required, saving the IO resource, for connecting with host boards like Raspberry Pi / Arduino^^ 3.3V /5V CompatibleCompatible with 3.3V /5V operating voltage, Dimension: 87.0 × 32.0 × 13.0 mm

Looking for a simple way to add a text display to your Raspberry Pi or BeagleBone Black project? Consider using a character LCD with the Python character LCD library! These classic displays can show a few lines of text, are inexpensive, and easily readable during the day or night with a bright backlight. You can follow this guide to learn how to connect a character LCD to a Raspberry Pi or BeagleBone Black and control the display from your own Python code!

Before you get started it will help to familiarize yourself with the character LCD guide. You will also want to make sure your Raspberry Pi is running the latest Raspbian operating system, and your BeagleBone Black is running the latest Debian or Debian-based distribution like Ubuntu.

If you haven"t used a Raspberry Pi or BeagleBone Black, be sure to follow the Learn Raspberry Pi series or BeagleBone Black SSH guide to understand the basic usage of each board and how to connect to a command terminal.

When you"re ready to get started, grab a character LCD, contrast adjustment potentiometer (included with Adafruit character LCDs), and a Raspberry Pi or BeagleBone Black. Continue to the next page to learn how to wire the display to your board.

Follow the steps below to wire a character LCD to your development board. Be careful to connect each wire to the correct pins as there are quite a few wires necessary to use the character LCD.

Note: The wiring below is for an RGB backlight display. If you"re using a monochrome backlight display you can use the wiring as-is and ignore the green and blue backlight wires. The red backlight wire will be used to control the monochrome display"s backlight.

If you would like to permanently turn on the LCD backlight, connect the red, green, blue backlight wires to ground instead of to your development board.

Connect Pi 5V power to the power rail of the breadboard. From the power rail connect one outer lead of the potentiometer,LCD pin 2 (VDD), and LCD pin 15 (LED ).

Connect Pi ground to the ground rail of the breadboard. From the ground rail connect the other outer lead of the potentiometer, LCD pin 1 (VSS), and LCD pin 5 (R/W).

Wire your BeagleBone Black to the LCD as follows. If you aren"t familiar with how to identify pins on the board, be sure to read the BeagleBone Black GPIO guide.

Connect BeagleBone Black 5V power pin P9_7 to the power rail of the breadboard. From the power rail connect one outer lead of the potentiometer, LCD pin 2 (VDD), and LCD pin 15 (LED ).

Connect BeagleBone Black ground pin P8_2 to the ground rail of the breadboard. From the ground rail connect the other outer lead of the potentiometer, LCD pin 1 (VSS), and LCD pin 5 (R/W).

The above wiring will use digital IO to control the colors of the backlight display. This means the backlight can only show 7 different colors (all the combinations of the 3 backlight LEDs). However because the BeagleBone Black supports PWM (pulse-width modulation) control of some hardware pins, it"s possible to use PWM pins to control the backlight LEDs and display a range of almost all colors.

To use PWM control of the backlight LEDs, wire your BeagleBone Black to the LCD as follows. Note that this wiring is exactly the same as the non-PWM wiring, except the 3 backlight LED pins (red, green, blue) are moved to different pins.

Connect BeagleBone Black 5V power pin P9_7 to the power rail of the breadboard. From the power rail connect one outer lead of the potentiometer, LCD pin 2 (VDD), and LCD pin 15 (LED ).

Connect BeagleBone Black ground pin P8_2 to the ground rail of the breadboard. From the ground rail connect the other outer lead of the potentiometer, LCD pin 1 (VSS), and LCD pin 5 (R/W).

Before installing the character LCD library you"ll need to make sure a few dependencies are installed by following the steps below. Make sure your development board has access to the internet so the software can be downloaded.

Once the library is installed you can find a few examples of its usage in the examples subdirectory. If you"re using a monochrome backlight LCD (i.e. single color, like a white on blue LCD) the char_lcd.py script will demonstrate the basic usage.

If you"re using a Raspberry Pi and have wired it according to this guide, you can immediately run the example. However if you"re using a BeagleBone Black or changed the wiring, first open char_lcd.py in a text editor (like nano) and uncomment/comment the lines towards the top that set the LCD pins.

The first part of the script are commands to import modules that will be used. In particular the Adafruit_CharLCD module is imported under the name LCD. Later in the script you can see how classes from the char LCD module are used to interact with the LCD.

The next part of the script configures which pins are connected to the LCD. You can see the Raspberry Pi configuration is uncommented by default, and below it the BeagleBone Black configuration is commented. You can use any digital GPIO pins in the configuration.

This section of the script configures the size of the LCD. By default the code assumes a 16 column, 2 row LCD however you can adjust the configuration to a 20x4 or other size display supported by the HD44780.

The next lines demonstrate basic usage of the LCD display class. The message function can be used to write a string of text to the display (including support for line breaks). The clear function clears the display, and the show_cursor and blink functions specify if the cursor is shown and should blink.

Although not shown above, there are other functions you might find useful on the LCD class. To see details on all functions you can have Python print help text for the class by executing (ignore the >>> prompt, it"s only shown for reference as the Python interpreter):

If you"re using a Raspberry Pi and have wired it according to this guide, you can immediately run the script. However if you"re using a BeagleBone Black or have changed the wiring, edit the script with a text editor and uncomment/change the lines at the top that define the LCD pins.

If you open the file char_lcd_rgb.py in a text editor (such as nano) I"ll describe the important differences between it and the previous char_lcd.py example below.

The first important difference is the configuration of LCD pins. Notice there are now explicit pins defined for the red, green, and blue backlight LEDs.

The Adafruit_RGBCharLCD class inherits from the Adafruit_CharLCD class so it has all the same functionality as demonstrated in the char_lcd.py example. In addition to the basic character LCD functionality the RGB character LCD class adds some functions to set the RGB color of the backlight.

If you"re using a RGB character LCD you can use PWM (pulse-width modulation) for fine control of the backlight color. By turning the different backlight red, green, and blue LEDs on and off very quickly with PWM, it"s possible to precisely control the color of the backlight.

Note that PWM control works best when there"s hardware support for PWM on your development board. The BeagleBone Black has support for up to 8 hardware controlled PWM pins and works great with the RGB character LCDs. However, the Raspberry Pi only has one hardware PWM pin and can be a little more troublesome to use PWM.

The RPi.GPIO library which is used by the character LCD library supports a software implementation of PWM on the Raspberry Pi. This lets you PWM control the RGB backlight even though the Pi doesn"t have 3 hardware PWM pins. In my testing software PWM worked reasonably well with the RGB character LCD backlight. You might notice slightly incorrect colors, but otherwise software PWM is worth a shot to finely adjust the backlight color on the Raspberry Pi.

The char_lcd_rgb_pwm.py file demonstrates usage of PWM backlight control. If you"re using a Raspberry Pi and have it wired to the LCD as described in this guide, you can immediately run the script. However if you have a BeagleBone Black or have changed the wiring, edit the file char_lcd_rgb_pwm.py in a text editor and comment/uncomment the lines at the top which define the LCD pins.

If you"re using the BeagleBone Black make sure you"ve followed the wiring for hardware PWM. Specifically, the red, green, and blue backlight pins need to be connected to the P9_16, P9_14, and P8_13 pins respectively.

You should see the backlight turned on to different colors for a short period of time, and then a continuous gradient of colors displayed with a message showing the red, green, and blue color displayed on the LCD. For example:

The code for PWM control is very similar to non-PWM control from char_lcd_rgb.py, however there are a few important differences. The first difference is how the Adafruit_RGBCharLCD class is intialized. Notice the enable_pwm=True flag is passed to the constructor/init function:

One problem with using a character LCD is that you give up a lot of GPIO pins to talk to the LCD. Four pins are used to send data, two pins are used for write and clock signals, and another pin or three are used for the backlight for a total of ~6-9 total pins! On a platform like the Raspberry Pi model A/B with only a dozen or so GPIO pins you can quickly run out of pins for other parts of your project. However with chips like the MCP23008 or MCP23017 you can easily add extra GPIO pins to your development board through an I2C interface!

If you aren"t familiar with the MCP230xx series of chips, there"s a great guide that describes their usage with a Raspberry Pi. Note that you don"t need to install the library or code from the guide, it"s only provided for reference.

To use an MCP230xx chip with a character LCD you will need to wire the MCP chip to your board"s I2C pins, and then wire the LCD to the MCP chip. Below are examples of wiring an MCP23017 to the Raspberry Pi or BeagleBone Black.

If you"d like to use an MCP23008 instead of the MCP23017 the wiring is similar, however consult the MCP23008 datasheet to see which pins are for power, ground, I2C, and GPIO.

Connect Pi 3.3V power to the power rail of the breadboard, and connect the MCP VDD and RESET to 3V power. Be careful to connect the 3.3 volt and not 5 volt power to these pins!

Connect Pi ground to the ground rail of the breadboard, and connect the MCP VSS and address pins, one outer lead of the potentiometer, the LCD ground, and the LCD R/W pin to the ground rail.

Connect Pi 5V power to the other outer lead of the potentiometer, LCD power, and LCD backlight pins. Note that 5 volt and not 3.3 volt power is used to power the LCD!

Connect BeagleBone Black 3.3V power pin P9_3 to the power rail of the breadboard, and connect the MCP VDD and RESET to 3V power. Be careful to connect the 3.3 volt and not 5 volt power to these pins!

Connect BeagleBone Black ground pin P9_1 to the ground rail of the breadboard, and connect the MCP VSS and address pins, one outer lead of the potentiometer, the LCD ground, and the LCD R/W pin to the ground rail.

Connect BeagleBone Black 5V power pin P9_7 to the other outer lead of the potentiometer, LCD power, and LCD backlight pins. Note that 5 volt and not 3.3 volt power is used to power the LCD!

Note that the BeagleBone Black has two I2C interfaces and this wiring will use the/dev/i2c-1 interface. Make sure there aren"t any device tree overlays loaded which use these I2C pins for other purposes. The default BeagleBone Black device tree configuration with no overlays loaded will expose the necessary I2C interface for the wiring above.

The char_lcd_mcp.py file in the library"s examples folder demonstrates the usage of a character LCD (non-RGB version) with an MCP23017 IO extender. Run the script by executing this command inside the examples directory:

First the required modules are imported. Notice the addition of the Adafruit_GPIO.MCP230xx module (imported under the name MCP). This MCP230xx class will be used to talk to the MCP chip and interface with the LCD.

Next the LCD pins are defined in the script. Note that these pin numbers are the MCP chip GPIO pin numbers, and NOT Raspberry Pi/BeagleBone Black pin numbers!

Also note if you"re using an MCP23008 chip you can instead create an instance of the MCP23008 class. This class is exactly the same as the MCP23017 class, but only supports 8 GPIO pins.

Now the Adafruit_CharLCD class instance is created. The big difference with this line and previous examples is that the MCP23017 class (created with the name "gpio") is passed in as the gpio parameter. By passing in an explicit gpio parameter, the char LCD class will use that GPIO class for talking to the LCD instead of the default development board GPIO pins.

The rest of the example code is exactly the same as the non-MCP character LCD example. You only need to change the setup and initialization of the character LCD class to use the MCP IO extender with an LCD!

The character LCD plate is a great way to add a simple character LCD and buttons to your Raspberry Pi project. Because the character LCD plate is based on the MCP23017 IO expander, the character LCD library easily supports the character LCD plate!

To use this character LCD library with the plate, make sure the library is installed by following the steps on the usage page. Then connect the LCD plate to your Raspberry Pi and execute the char_lcd_plate.py script in the library"s examples folder:

Note that the example assumes an RGB character LCD is attached to the plate, however it will still run with a monochrome LCD (you just might see the backlight turn on and off in different ways as colors as displayed).

When you run the example you should see the backlight run through different colors, and then the display will tell you to press buttons. If you press different buttons on the LCD plate you should see the button name and a different color displayed. Try pressing buttons to see how the script reacts!

Examine the code for the char_lcd_plate.py script to see how to use the character LCD plate code. The usage of the LCD plate is very similar to RGB or monochrome LCD usage, with a few key differences.

The first difference is that you create and instance of the Adafruit_CharLCDPlate class. You don"t need to pass any parameters in to this class" constructor/init function because it is preconfigured for the LCD plate.

The second difference is that the Adafruit_CharLCDPlate adds a function to test if a button is pressed. Notice how the is_pressed function is called for each button, and if it returns True then the button press is detected.

For example to check if the select button is pressed you can call is_presssed(LCD.SELECT), or to check if the right button is pressed you can call is_pressed(LCD.RIGHT).

This tutorial shows how to use the I2C LCD (Liquid Crystal Display) with the ESP32 using Arduino IDE. We’ll show you how to wire the display, install the library and try sample code to write text on the LCD: static text, and scroll long messages. You can also use this guide with the ESP8266.

Additionally, it comes with a built-in potentiometer you can use to adjust the contrast between the background and the characters on the LCD. On a “regular” LCD you need to add a potentiometer to the circuit to adjust the contrast.

Before displaying text on the LCD, you need to find the LCD I2C address. With the LCD properly wired to the ESP32, upload the following I2C Scanner sketch.

Displaying static text on the LCD is very simple. All you have to do is select where you want the characters to be displayed on the screen, and then send the message to the display.

The next two lines set the number of columns and rows of your LCD display. If you’re using a display with another size, you should modify those variables.

Scrolling text on the LCD is specially useful when you want to display messages longer than 16 characters. The library comes with built-in functions that allows you to scroll text. However, many people experience problems with those functions because:

In a 16×2 LCD there are 32 blocks where you can display characters. Each block is made out of 5×8 tiny pixels. You can display custom characters by defining the state of each tiny pixel. For that, you can create a byte variable to hold  the state of each pixel.

In summary, in this tutorial we’ve shown you how to use an I2C LCD display with the ESP32/ESP8266 with Arduino IDE: how to display static text, scrolling text and custom characters. This tutorial also works with the Arduino board, you just need to change the pin assignment to use the Arduino I2C pins.

Obliterate the contents of flash. An example of a NO_FLASH binary (UF2 loaded directly into SRAM and runs in-place there). A useful utility to drag and drop onto your Pico if the need arises.

Runs the lwip-contrib/apps/ping test app under FreeRTOS in NO_SYS=0 (i.e. full FreeRTOS integration) mode. The test app uses the lwIP socket API in this case.

An LED blink with the pico_bootsel_via_double_reset library linked. This enters the USB bootloader when it detects the system being reset twice in quick succession, which is useful for boards with a reset button but no BOOTSEL button.

A copy of the TinyUSB device example with the same name, but with a CMakeLists.txt which demonstrates how to add a dependency on the TinyUSB device libraries with the Raspberry Pi Pico SDK

USB Dual Mode uses PIO as a USB host controller and the RP2040 USB device controller as a device controller. All the USB dual examples come directly from the TinyUSB dual examples directory here.