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Product description: Chain Key - mechanical button - M5Stack U206
Chain Key is a compact input module featuring a single, hot-swappable mechanical button with a tactile blue switch. Designed for projects requiring reliable, clear user input, such as human-machine interaction systems and smart home control, the module utilizes a mechanical keypad switch that provides a distinctive click, high durability, and easy, solderless replacement. Integrated two programmable RGB LEDs (WS2812B) provide visual indication of the system's status, operating mode, or response to a button press.
Chain Key - mechanical button - M5Stack U206. 
Chain Key is a compact input module equipped with a single hot-swappable mechanical button.Special features
- Single hot-swappable mechanical button with tactile, clicky blue switch
- Possibility of quick switch replacement without soldering
- Two programmable RGB LEDs (WS2812B) to indicate status and operating modes
- Built-in STM32G031G8U6 microcontroller for stable input support
- UART communication enabling cascading of modules
- Two HY2.0-4P connectors, compatible with other M5Stack Chain series components
- Compact design for easy integration in embedded and prototype projects
Practical applications
The M5Stack Chain Key is ideal as a control button in smart home systems, for example, to activate scenes, control lighting, or activate automation. It can also be used in human-machine interfaces (HMIs), operator panels, and educational and prototyping projects. Thanks to its modular design and UART communication, the module easily integrates into more complex control systems based on the M5Stack Chain ecosystem.
Technical specifications of the button
- Input type: single mechanical button
- Switch type: hot-swap mechanical keyboard, blue switch
- Microcontroller: STM32G031G8U6
- Supply voltage: DC 5 V
- Communication interface: UART
- Connectors: 2x HY2.0-4P
- LEDs: 2x RGB WS2812B
- Current consumption: approx. 28.24 mA
- Operating temperature range: 0°C to 40°C
- Dimensions: 23.9 x 23.9 x 34.4 mm
- Weight: 9.1 g
Contents of the set
- 1x Chain Key
- 1x Chain Bridge
- 1x Keycap Sticker
Integrated two programmable RGB LEDs (WS2812B) enable visual signaling. Useful links |
