Skip to content

Mechanical Key Button Unit

U144 · M5Stack

Mechanical Key Button Unit photo

Unit Key is a single-key input unit with built-in RGB light. It uses a tactile mechanical blue switch with strong tactile feedback, and the keycap is replaceable, providing excellent mechanical feel and rebound. It features a built-in SK6812 programmable full-color RGB LED that supports 256 levels of brightness display. The unit exposes two digital IO interfaces for key state acquisition and light control. It is suitable for DIY projects requiring button input interaction. Features Blue… (M5Stack U144)

Part numberU144
ManufacturerM5Stack
CategoryUser Input & Controls › Buttons & Keypads
Pins4

Mechanical Key Button Unit pinout

PinNameTypeDescription
1SIG1bidirectionalPORT.B: GPIO/analog; PORT.C: UART - see the unit's pin map
2SIG2bidirectionalPORT.B: GPIO/analog; PORT.C: UART - see the unit's pin map
35Vpower
4GNDground

Schematic symbol and footprint

5V3SIG11SIG22GND4
Schematic symbol
1234
Footprint: Grove HY2.0 4-pin through-hole, 2.0 mm pitch — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.

Related parts