M5Stack Unit CardKB2 Keyboard Input Device
M5Stack Unit CardKB2 Keyboard Input Device is a card-sized 42-key portable keyboard input unit and equipped with ESP32-C61HF4. This device supports 2.4GHz Wi-Fi 6/BLE wireless communication and reserved M2 mounting holes for easy integration into applications. The unit CardKB2 features an onboard HY2.0-4P connector that enables communication in I2C/UART mode, while a USB Type-C® port provides power supply and firmware flashing. This compact and lightweight device is ideal for everyday carry and embedded integration. Additional features include an RGB LED status indicator, a Reset button, a Boot button, and built-in input overvoltage protection. Typical applications include text input for portable devices, HMI in embedded systems, wireless control terminals for IoT devices, and educational programming and maker projects.
Features
- Equipped with ESP32-C61HF4, supporting Wi-Fi 6 / BLE wireless communication
- Full keyboard input with support for multiple key combinations (single press, Sym, Fn)
- Onboard RGB LED (XL-1615RGBC-RF) for keyboard status indication
- Reserved M2 mounting holes for easy application integration
- Power supply:
- USB Type-C®
- DC 5V
Applications
- Text input for portable devices
- Human-machine interaction in embedded systems
- Wireless control terminal for IoT devices
- Educational programming and maker projects
Specifications
- ESP32-C61HF4 @ RISC-V 32-bit single-core, 120MHz SoC
- 4MB flash
- 1x RGB LED
- 1x HY2.0-4P expansion interface
- Keys:
- 42-key keyboard
- 1x reset button
- 1x boot button
- 5V @ 19.31mA (powered via Grove interface) standby power
- 84.7 x 54.3mm x 1mm product size
- 170mm x 120m x 8mm package size
- 115200bps @ 8N1 power supply/firmware flashing, default firmware log output
Dimensions
