zmk/docs/docs/intro.md

title	sidebar_label	slug
Introduction to ZMK	Introduction	/

ZMK Firmware is an open source (MIT) keyboard firmware built on the Zephyr™ Project Real Time Operating System (RTOS). ZMK's goal is to provide a modern, wireless, and powerful firmware free of licensing issues.

Features

ZMK is currently missing some features found in other popular firmware. This table compares the features supported by ZMK, BlueMicro and QMK:

Legend:	✅ Supported	🚧 Under Development	💡 Planned

Feature	ZMK	BlueMicro	QMK
Low Latency BLE Support	✅	✅
Multi-Device BLE Support	✅
USB Connectivity	✅	✅	✅
User Configuration Repositories	✅
Split Keyboard Support	✅	✅	✅
Keymaps and Layers	✅	✅	✅
Hold-Tap (which includes Mod-Tap and Layer-Tap)	✅	✅	✅
Tap-Dance	✅	✅1	✅
Keyboard Codes	✅	✅	✅
Media & Consumer Codes	✅	✅	✅
Encoders2	✅	✅	✅
Display Support3	🚧	🚧	✅
RGB Underglow	✅	✅	✅
Backlight	✅	✅	✅
One Shot Keys	✅	✅	✅
Combo Keys	✅		✅
Macros	✅	✅	✅
Mouse Keys	🚧	✅	✅
Low Active Power Usage	✅
Low Power Sleep States	✅	✅
Low Power Mode (VCC Shutoff)	✅	✅
Battery Reporting	✅	✅
Shell over BLE	💡
Realtime Keymap Updating	💡		✅
AVR/8 Bit			✅
Wide Range of ARM Chips Supported	✅

Code Of Conduct

Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.

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1. Tap-Dances are limited to single and double-tap on BlueMicro ↩︎

2. OLEDs are currently proof of concept in ZMK. ↩︎

3. Encoders are not currently supported on peripheral side splits. ↩︎