Chain DualKey is a programmable dual-key input development board equipped with the ESP32-S3FN8 main control chip. The front integrates 2 hot-swappable blue switch mechanical keyboard keys and 2 programmable RGB LEDs, providing excellent interactive feedback. It has a built-in 350mAh lithium battery, combining with a low-power design for good battery life. The product comes with pre-installed Chain macro keyboard firmware, supports USB / BLE connections, and can emulate HID input devices. After the device is powered on, you can connect to the device's AP hotspot and configure the HID function mapping for the local device or expansion nodes via the built-in web page to achieve various control functions.
This development board adopts the M5Stack Chain series expandable design, featuring two HY2.0-4P expansion ports that support lateral expansion and connection to other sensor devices. With the USB-OTG peripheral function built into ESP32-S3, it is suitable for smart home, keyboard peripherals, macro keyboards, and other scenarios.
Features
ESP32-S3FN8 main control chip
Built-in 350mAh lithium battery
2 programmable RGB LEDs
2 hot-swappable blue switch keys
M5Stack Chain series expandable design
LEGO-compatible holes on the back
Lanyard design
Includes
1 x Chain DualKey
1 x Keycap Sticker
Specifications
Specification
Parameter
SoC
ESP32-S3FN8 @ Dual-core Xtensa LX7 processor, with a main frequency up to 240MHz
Flash
8MB
Power Input
USB: DC 5V
Battery
350mAh lithium battery
RGB LED
2x WS2812B
Operating Temp
0 ~ 40°C
Standby Current
Power-off mode (VBAT): DC 4.2V@8.97uA Deep sleep mode (VBAT): DC 4.2V@107.64uA USB 5V power (no battery): DC 5V@41.7mA
