Unit 8Servos2-Chain
SKU:U223
Description
Unit 8Servos2-Chain is an 8-channel servo cascade control unit with an integrated STM32G031G8U6 core controller. It adopts a UART communication interface and is compatible with the Chain series UART serial cascade communication protocol. It 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 serve as the input and output interfaces of the Chain series protocol, enabling chained connections of multiple 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, a DC power interface status indicator, and a HY2.0-4P interface undervoltage status indicator 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
- Adopts the Chain series UART serial cascade communication protocol
- 2x HY2.0-4P interfaces support multi-device cascade
- 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 detection
- 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-Chain
- 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 | UART @ Chain Series Communication Protocol (IN / OUT) |
| 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@5.71mA |
| Operating Power Consumption | DC 12V@1.6A (8 servo loads) |
| Product Size | 56.0 x 24.0 x 11.5mm |
| Product Weight | 11.7g |
| Package Size | 138.0 x 93.0 x 14.0mm |
| Gross Weight | 17.1g |
Learn
Schematics
PinMap
UART
TX2 of UART2 is connected to PA14 via R12 (0Ω), and RX2 is connected to PA15.
| STM32G031G8U6 | PB7 | PB6 | PA14 | PA15 |
|---|---|---|---|---|
| UART1 | RXD1 | TXD1 | ||
| UART2 | TXD2 | RXD2 |
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 |