Unit Encoder
Description
Unit Encoder is an I2C communication interface rotary encoder expansion unit. It integrates a 30-position pulse encoding knob (with button input) + 2x SK6812 programmable RGB LEDs. The built-in STM32F030 main control integrates encoder pulse signal acquisition firmware, allowing users to directly obtain the encoding value through I2C read operations, simplifying the process. It is suitable for scenarios such as scale value control/volume adjustment.
Features
- 30-position pulse encoding knob (produces 30 pulses per full rotation)
- 2 x SK6812 programmable RGB LEDs
- 1 x Button input
Includes
- 1 x Unit Encoder
- 1 x HY2.0-4P Grove connection cable (20cm)
Applications
- Human-computer interaction
- Volume knob
Specifications
| Specification | Parameter |
|---|---|
| Pulse Encoding Knob | 30-position pulse encoding knob (with button input) |
| Programmable RGB LED | 2x SK6812 |
| Operating Current | Encoder operation (DC-5V@17mA) |
| Net Weight | 7.4g |
| Gross Weight | 12.3g |
| Product Size | 32 x 24 x 22mm |
| Package Size | 93 x 138mm |
Schematics
PinMap
Unit Encoder
| HY2.0-4P | Black | Red | Yellow | White |
|---|---|---|---|---|
| PORT.A | GND | 5V | SDA | SCL |
Softwares
Arduino
UIFlow 1.0
UIFlow 2.0
Internal Firmware
Protocol
- Protocol Type: I2C
- I2C Address: 0x40
ENCODER_REG 0x10
| REG | len | Description | Values | R/W |
|---|---|---|---|---|
| 0x10 | 2 | Read encoder value | [0] VALUE_L [1] VALUE_H | R |
BUTTON_REG 0x20
| REG | len | Description | Values | R/W |
|---|---|---|---|---|
| 0x20 | 2 | Read button status | [0] BTN STATUS | R |
RGB_LED_REG 0x30
| REG | len | Description | Values | R/W |
|---|---|---|---|---|
| 0x30 | 4 | Write control RGB LED color | [0] LED index (1/2) [1] RED [2] GREEN [2] BLUE | W |
Video
- Reading encoder values