# LILYGO T-Knob

> Smart rotary encoder controller based on ESP32-C6 with WiFi 6, BLE 5, Zigbee/Thread, 4 RGB LEDs, buzzer, and magnetic Hall-effect knob for wireless volume control and smart home automation.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$37.28
- **Product Readiness:** developer
- **CPU:** RISC-V single-core @ 160MHz
- **CPU Architecture:** RISC-V
- **CPU Cores:** 1
- **RAM:** 512KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V
- **Operating Voltage:** 3.3V
- **Antenna:** Built-in PCB antenna

## Connectivity

- **Wifi:** 802.11ax (WiFi 6)
- **Bluetooth:** BLE 5.0
- **Zigbee:** Zigbee 3.0
- **Thread:** Thread 1.3

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Certifications

CE, FCC

## Compatible Firmware

arduino, esp-idf, esphome

## Use Cases

- smart-knob
- smart-home
- home-automation

## Components

- **ESP32-C6** (mcu): Single-core RISC-V at 160MHz with WiFi 6 (802.11ax), BLE 5.0, and IEEE 802.15.4 for Zigbee/Thread. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-c6_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-knob&source=md-export)
- **rotary-encoder** (rotary-encoder): Contactless magnetic rotary encoder for smooth infinite rotation without mechanical wear. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Knob&ref=openhardware.directory&product=lilygo-t-knob&source=md-export)

## Protocols

- **I2C**: SDA: GPIO6, SCL: GPIO7
- **UART**: TX: GPIO16, RX: GPIO17

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| GPIO6 | I2C SDA | I2C | digital-input, digital-output |
| GPIO7 | I2C SCL | I2C | digital-input, digital-output |
| GPIO20 | LED 1 | — | digital-output |
| GPIO14 | Buzzer | — | digital-output, pwm |

## Description

## Overview

The LILYGO T-Knob is a wireless smart rotary controller built on the ESP32-C6, featuring a magnetic Hall-effect rotary encoder for infinite smooth rotation without mechanical wear. The ESP32-C6's multi-protocol connectivity — WiFi 6 (802.11ax), BLE 5.0, and IEEE 802.15.4 for Zigbee 3.0 and Thread 1.3 — enables direct integration with all major smart home ecosystems.

Four onboard RGB LEDs and a buzzer provide visual and audible feedback for volume levels, mode changes, or alerts. The knob push-down button enables click-to-confirm interactions for a complete rotary interface without additional components.

Use cases include wireless volume knobs for music systems, smart lighting dimmers, thermostat dials, Home Assistant scene selectors, and multi-function media controllers. The Thread and Zigbee support enables battery-free sleep modes with near-instant wake, while WiFi 6 ensures low-latency response even in congested 2.4 GHz environments.

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-knob&ref=openhardware.directory&product=lilygo-t-knob&source=md-export) — $37.28

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-knob&ref=openhardware.directory&product=lilygo-t-knob&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Knob&ref=openhardware.directory&product=lilygo-t-knob&source=md-export)

## Tags

`esp32-c6`, `rotary-encoder`, `knob`, `zigbee`, `thread`, `smart-home`, `lilygo`

## Images

![LILYGO T-Knob](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-knob/01ddf60a8fde.jpg)
![LILYGO T-Knob](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-knob/aa013a66ce82.jpg)
![LILYGO T-Knob](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-knob/8a59a4ccbf72.jpg)
![LILYGO T-Knob](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-knob/b2449f1c3181.jpg)
![LILYGO T-Knob](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-knob/d2dda134a37c.jpg)
![LILYGO T-Knob](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-knob/aa15f39401df.png)

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