# ZMK Firmware — Wireless Keyboard Firmware Built on Zephyr

> Modern, open-source wireless keyboard firmware built on Zephyr RTOS with BLE-first architecture, split keyboard support, and MIT license. The dominant firmware for wireless mechanical keyboards with 3,900+ GitHub stars.

## Details

- **Difficulty:** intermediate
- **Project Type:** firmware
- **Board Types:** nRF52840, nRF52833, nRF5340
- **Firmware:** ZMK, Zephyr RTOS
- **Use Cases:** keyboards, wireless-input, custom-keyboards
- **Links:** Github Url: https://github.com/zmkfirmware/zmk, Blog Url: https://zmk.dev/

## Tags

`zmk`, `keyboard`, `wireless`, `bluetooth`, `zephyr`, `nrf52840`, `split-keyboard`, `mechanical-keyboard`

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