USB + Serial Backpack for LCD
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USB + Serial Backpack for LCD

Adafruit USB + Serial LCD Backpack Add-On with Cable

€15.74 (tax incl.) €13.01 (tax excl.)
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Adding a character display to your project or computer has never been easier with this USB or TTL serial backpack produced by Adafruit! This custom-designed PCB allows you to connect the back of any 16x2 or 20x4 character LCD (and even support the RGB backlight LCD).
At MCHobby, we do already know this product since we distribute it with a RGB LCD. We even had a tutoriel (in French) to use it with a Raspberry-Pi.
It can do everything you want: printing text, automatic scrolling, setting the backlight, adjusting contrast, making custom characters, turning on and off the cursor, etc. You can also connect  a RGB backlight LCD controlled with 3 pins having a 8-bit PWM control. So you can create a background color having almost any color you want - red, green, blue, pink, white, purple yellow, teal, salmon, chartreuse. You can even switch the backlight off for a neutral background. For the non-RGB backlights LCD, the standard backlight LED will be wired on the RED pin as the LCD controler. So, you will be able to controle the backlight luminosity by controling the the RED color of this backpack :-)

Inside this backpack is an USB-capable AT90USB162 chip. It listens the commands on both a mini-B USB port and a TTL serial input wire. The USB shows up as a COM/serial port on Windows/Mac/Linux. The backpack will automatically select data the interface connecter on the board. For the USB connection, it will work at any baud rate. For the TTL connection, the default baud rate is 9600 (you can change it by sending a command to set the baud rate to 2400, 4800, 9600, 19200, 28800 or 57600 baud). The baud rate is displayed on the LCD during powerup.
The backpack have a permanent EEPROM, so the configured setting as baud rate, backlight color, brightness, splash screen, etc. are automatically stored when changed and reloaded at power-up.

The command interface is compatible with the popular "Matrix Orbital" specifications so this backpack will work perfectly with computer applications or libraries that are expecting a "Matrix" LCD such as "LCD Smartie". Adafruit added few extra commands to change the RGB backlight and setting the LCD size.
If you don't want to get bored with the commands, you can simply send ASCII characters to the LCD and it will appear on the LCS as "typed" on the interface.


For each order, you will receive the backpack. LCD not included but you can buy them on our WebShop.

Technical detail

  • Compatible with any 'standard' 16x2 or 20x4 character LCD as well as any Adafruit RGB LCD.
  • Full PWM backlight control
  • Supports the following Matrix Orbital commands:
    • Autoscrolling
    • Baud rate adjust
    • Clear screen
    • Change splash
    • Auto-wrap
    • Set cursor
    • Home
    • Move cursor
    • Underline/Block cursor
    • Create custom characters
    • Save custom character bank
    • Load custom character bank
    • Display On/Off
    • Set brightness
    • Set contrast
  • Supports extended Adafruit commands:
    • Set RGB backlight
    • Set LCD size (up to 20x4)
  • General Purpose Outputs (4)
  • Schematic, GitHub link, and Fritzing available in the product tutorial
  • Product Dimensions: 54.0mm x 29.0mm x 7.3mm
  • Product Weight: 6.8g


Data sheet
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