Unit 8Servos2-I2C
SKU:U222
Description
Unit 8Servos2-I2C is an 8-channel servo cascade control unit featuring the STM32G031G8U6 as its core controller. It adopts an I2C communication interface and provides 8x configurable IO channels that support configuring multiple operating modes: servo control, digital input / output, ADC input, RGB LED control, and PWM mode.
Two onboard HY2.0-4P interfaces are connected internally and share the same I2C bus, and a 16-position rotary encoder switch is provided for flexible configuration of the device I2C address, making it convenient to expand and connect other I2C devices. This unit supports DC 9 ~ 24V input and integrates an SY8303AIC step-down circuit to provide a 5V supply, with a maximum total output current of 3A. An onboard INA199A1DCKR current detection circuit can sample the total servo current, and input voltage and 5V supply voltage sampling circuits as well as power status indicators are also provided, making it suitable for application scenarios such as multi-servo control, robot joint drive, and smart toys.
Features
- STM32G031G8U6 core controller
- 8x configurable IO channels supporting multiple operating modes:
- Servo control
- Digital input / output
- ADC input
- RGB LED control
- PWM mode
- Communication interface and address configuration
- I2C communication interface
- 2x HY2.0-4P interfaces for multi-I2C device expansion
- 16-position rotary encoder switch for I2C address configuration
- Power and detection
- DC 9 ~ 24V power input, with an integrated 5V@3A step-down circuit (peripheral drive + HY2.0-4P output to power the controller)
- Integrated total servo current monitoring
- DC input voltage detection
- 5V supply voltage detection
- Status indication
- Red indicator: DC power interface status indicator (lights up when the interface voltage is higher than 8.5V)
- Green indicator: HY2.0-4P interface undervoltage status indicator (lights up when the interface voltage is lower than 4.5V)
Includes
- 1 x Unit 8Servos2-I2C
- 1 x HY2.0-4P Grove Cable (20cm)
Applications
- Multi-servo control
- Robot joint drive
- Smart toys
- STEAM education
Specifications
| Specification | Parameter |
|---|
| MCU | STM32G031G8U6 |
| Configurable IO Channels | 8, supports operating modes: servo control, digital input / output, ADC input, RGB LED, PWM mode |
| IO Channel Interface | 8 x 2.54-3P |
| Communication Interface | I2C @ 0x25 ~ 0x34 |
| DC Power Input Interface | Input voltage: DC 9 ~ 24V, spec: 5.5 x 2.1mm, polarity: center positive, outer negative |
| Step-Down Chip | SY8303AIC |
| Power Output | DC 5V, max 3A (shared by all onboard loads) |
| Current Detection Circuit | INA199A1DCKR, paired with a 10mΩ sampling resistor |
| Indicator | Red DC input monitoring indicator, green undervoltage monitoring indicator |
| Standby Power Consumption | DC 12V@4.56mA |
| Operating Power Consumption | DC 12V@1.6A (8 servo loads) |
| Product Size | 56.0 x 24.0 x 11.5mm |
| Product Weight | 11.6g |
| Package Size | 138.0 x 93.0 x 13.0mm |
| Gross Weight | 17.2g |
Schematics
PinMap
HY2.0-4P
| HY2.0-4P | Black | Red | Yellow | White |
|---|
| IN & OUT | GND | 5V | SDA | SCL |
Input/Output Interface Description
The input and output interfaces of the Unit 8Servos2-I2C are connected internally and can be used to cascade more Unit 8Servos2-I2C units or I2C devices.
I2C Address Table
| Rotary Encoder Switch | I2C Address |
|---|
| 0 | 0x25 |
| 1 | 0x26 |
| 2 | 0x27 |
| 3 | 0x28 |
| 4 | 0x29 |
| 5 | 0x2A |
| 6 | 0x2B |
| 7 | 0x2C |
| 8 | 0x2D |
| 9 | 0x2E |
| A | 0x2F |
| B | 0x30 |
| C | 0x31 |
| D | 0x32 |
| E | 0x33 |
| F | 0x34 |
Model Size
Datasheets
Softwares
Arduino
Internal Firmware
Protocol
Video
Product Comparison
| Product Compare | Unit 8Servos2-I2C  | Unit 8Servos2-Chain  |
|---|
| Communication Interface | I2C | UART (Chain Protocol) |
| Node Expansion | I2C address: 0x25 ~ 0x34 | Chain cascade |
| Channel Count | 8 | 8 |
| Operating Modes | Digital input/output / Servo / ADC / RGB / PWM | Digital input/output / Servo / ADC / RGB / PWM |
| Power Input | DC 9 ~ 24V | DC 9 ~ 24V |
| Servo Power Supply | DC 5V | DC 5V |
| Current Detection | INA199 | INA199 |
| Core Chip | STM32G031G8U6 | STM32G031G8U6 |
