CardKB2 Keyboard Unit (ESP32-C61)
Description
Unit CardKB2 is a card-sized 42-key portable keyboard input unit. Its compact and lightweight form factor makes it ideal for on-the-go use and embedded integration. Powered by an ESP32-C61HF4 MCU with built-in 2.4 GHz Wi-Fi 6 support, the pre-installed firmware allows flexible configuration across four communication modes: I2C, UART, BLE HID, and ESP-NOW. The unit features an onboard HY2.0-4P expansion interface and a USB Type-C port for power supply and firmware flashing. Additional hardware includes an RGB LED status indicator, a reset button, and a Boot button. Input power overvoltage protection is also integrated, making this unit well-suited for wireless input, interactive control, and a wide range of portable application scenarios.
Features
- Powered by ESP32-C61HF4 with Wi-Fi 6 / BLE wireless communication support
- Full keyboard input with support for multiple key combinations (single press, Sym, Fn)
- Onboard RGB LED (XL-1615RGBC-RF) for keyboard status indication
- Power Supply:
- USB Type-C
- DC 5V
Includes
- 1 x Unit CardKB2
- 1 x HY2.0-4P Grove Cable (20cm)
Applications
- Text input for portable devices
- Human-machine interaction in embedded systems
- Wireless control terminal for IoT devices
- Educational programming and maker projects
Specifications
| Specification | Parameter |
|---|---|
| SoC | ESP32-C61HF4 @ RISC-V 32-bit single-core, 120 MHz |
| Flash | 4MB |
| Wi-Fi | 2.4 GHz Wi-Fi 6 |
| Keys | 42-key keyboard, 1x Reset button, 1x Boot button |
| USB Type-C | Power supply / firmware flashing, default firmware log output: 115200bps @ 8N1 |
| RGB LED | 1x RGB LED |
| Expansion Interface | 1x HY2.0-4P |
| Standby Power | 5V@19.31mA (under Grove interface power supply conditions) |
| Product Size | 84.7 x 54.3 x 1.0mm |
| Product Weight | 22.4g |
| Package Size | 170.0 x 120.0 x 8.0mm |
| Gross Weight | 28.9g |
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Description
Description
Unit CardKB2 is a card-sized 42-key portable keyboard input unit. Its compact and lightweight form factor makes it ideal for on-the-go use and embedded integration. Powered by an ESP32-C61HF4 MCU with built-in 2.4 GHz Wi-Fi 6 support, the pre-installed firmware allows flexible configuration across four communication modes: I2C, UART, BLE HID, and ESP-NOW. The unit features an onboard HY2.0-4P expansion interface and a USB Type-C port for power supply and firmware flashing. Additional hardware includes an RGB LED status indicator, a reset button, and a Boot button. Input power overvoltage protection is also integrated, making this unit well-suited for wireless input, interactive control, and a wide range of portable application scenarios.
Features
- Powered by ESP32-C61HF4 with Wi-Fi 6 / BLE wireless communication support
- Full keyboard input with support for multiple key combinations (single press, Sym, Fn)
- Onboard RGB LED (XL-1615RGBC-RF) for keyboard status indication
- Power Supply:
- USB Type-C
- DC 5V
Includes
- 1 x Unit CardKB2
- 1 x HY2.0-4P Grove Cable (20cm)
Applications
- Text input for portable devices
- Human-machine interaction in embedded systems
- Wireless control terminal for IoT devices
- Educational programming and maker projects
Specifications
| Specification | Parameter |
|---|---|
| SoC | ESP32-C61HF4 @ RISC-V 32-bit single-core, 120 MHz |
| Flash | 4MB |
| Wi-Fi | 2.4 GHz Wi-Fi 6 |
| Keys | 42-key keyboard, 1x Reset button, 1x Boot button |
| USB Type-C | Power supply / firmware flashing, default firmware log output: 115200bps @ 8N1 |
| RGB LED | 1x RGB LED |
| Expansion Interface | 1x HY2.0-4P |
| Standby Power | 5V@19.31mA (under Grove interface power supply conditions) |
| Product Size | 84.7 x 54.3 x 1.0mm |
| Product Weight | 22.4g |
| Package Size | 170.0 x 120.0 x 8.0mm |
| Gross Weight | 28.9g |
