Unit Encoder
Description
Unit Encoder is a rotary encoder expansion unit with I2C interface, integrated with 30-bit pulse encoding knob (with button function) + 2 x SK6812 programmable RGB LEDs. The built-in STM32F030 flashed with the encoder pulse acquisition firmware, allowing users to obtain the encoded value directly via I2C. Suitable for scale value control/volume adjustment and other control scenarios.
Features
- 30-bit pulse encoding knob (30 pulses per rotation)
- 2x SK6812 programmable RGB LEDs
- 1x Button input
Include
- 1x Unit Encoder
- 1x HY2.0-4P cable (20cm)
Applications
- Human Machine Interaction (HMI)
- Volume knob
Specifications
| Specifications | Parameters |
|---|---|
| Pulse encoder knob | 30-bit pulse encoder knob (with key input) |
| Programmable RGB LED | 2x SK6812 |
| Working current | Encoder working (DC-5V@17mA) |
| Net weight | 7.4g |
| Gross weight | 12.3g |
| Product size | 32 * 24 * 22mm |
| Packing size | 93 * 138mm |
PinMap
- Unit Encoder
| M5Core(PORT A) | GPIO22 | GPIO21 | 5V | GND |
|---|---|---|---|---|
| Unit Encoder | SCL | SDA | 5V | GND |
Schematic
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 | Control RGB LED Color | [0]LED Index（1/2） [1] RED [2] GREEN [2] BLUE | W |
Notice:
UnitEncoder firmware(stm32) must be rewritten to use the following features. UnitEncoder firmware
UnitEncoder firmware(stm32) must be rewritten to use the following features. UnitEncoder firmware
MODE_REG 0x00
| REG | len | description | values | R/W |
|---|---|---|---|---|
| 0x00 | 1 | Change Mode | [0] PULSE [1] AB | W |
ENCODER_REG 0x10
| REG | len | description | values | R/W |
|---|---|---|---|---|
| 0x10 | 2 | Read encoder value | [0] VALUE_L [1] VALUE_H | R/W |
MODE_REG 0x40
| REG | len | description | values | R/W |
|---|---|---|---|---|
| 0x40 | 1 | Reset Counter | [1>=]Reset | W |
Example
Arduino
- Libraries
- Firmware
UIFlow
How to use Unit encoder and related API instructions in the UIFlow1.0
How to use Unit encoder and related API instructions in the UIFlow2.0
Video
- Read Encoder Value