Build a wireless, single button Bluetooth keyboard that you can use as a mute button, macro launcher, presentation clicker, and more. Plus, you can easily customize it from a WebSerial web page.
This project is inspired by the Monokey on Kickstarter (which was made in a limited run and is not currently available).
Features
- BLE HID keyboard with key combos, strings, media keys
- NVS persistence for all settings
- Configurable connected/pressed colors and brightness
- Auto sleep with user selected timeout
- Serial settings interface
- WebSerial interface web page
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6mm x 3mm Neodymium Disc Magnets
Four magnets, such as these, for securing the One Key case.
Page last edited April 14, 2026
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