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CONTENTS

Unit CardKB

SKU:U035

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Description

Unit CardKB is a fully functional QWERTY keyboard. If you want to achieve some complex keyboard input interactions, relying solely on the 3 buttons on the M5Core might be challenging. To solve this problem, Unit CardKB comes to the rescue.

Using Unit CardKB not only allows for full keyboard input but also supports various key combinations (Sym + Key, Shift + Key, Fn + Key) to output richer key values. This Unit communicates with M5Core through PORT A (I2C interface). The I2C address is 0x5F.

Features

  • Full keyboard input with various key combinations.
  • HY2.0-4P interface, supports UIFlow and Arduino

Includes

  • 1 x Unit CardKB
  • 1 x HY2.0-4P Grove connection cable (20cm)

Applications

  • Keyboard peripheral for M5Stack Core

Specifications

Specification Parameter
Number of Keys 50
RGB LED x 1
Communication I2C
Net Weight 17g
Gross Weight 18g
Product Size 88 x 54 x 5mm
Package Size 136 x 92 x 5mm

Learn

1. Button Combination Instructions:

  • Press a single key, the keyboard will output the first key value (letter keys will output in lowercase). For example, pressing "Q" will output "q" (lowercase).

  • Sym+key, the keyboard will output the second key value. For example, after clicking "Sym", pressing "Q" will output "{". Double-click "Sym" to lock the function, and any subsequent key press will output the second key value. Double-click "Sym" again to unlock.

  • Shift+key, the keyboard will output the uppercase form of the letter. For example, after clicking "Shift", pressing "Q" will output "Q" (uppercase). Double-click "Shift" to lock the function, and any subsequent key press will output in uppercase. Double-click "Shift" again to unlock.

  • Fn+key (custom function key combination), the keyboard will output the third key value. You can customize the function corresponding to the pressed key.

PinMap

Unit CardKB v1.1

HY2.0-4P Black Red Yellow White
PORT.A GND 5V SDA SCL

ATMega8A ISP Download Interface Pin Definition

Softwares

Arduino

UiFlow1

UiFlow2

Internal Firmware

Protocol

  • Protocol Type: I2C
  • I2C Address: 0x5F
/*--------------------------------------------------------------------------------------------------*/
| KEYBOARD REG       | 0x5F
| ------------------------------------------------------------------------------------------------
| keyboard_value_reg[0] 0x5F        |  R |  KEYBOARD VALUE
/*----------------------------------------------------------------------------------------------------

EasyLoader

Easyloader Download Link Note
Unit CardKB example with M5Core download /

Video