WVS ESP32 Servo Driver Expansion Board WiFi Bluetooth 253 Servos

The WVS ESP32 Servo Driver Expansion Board is a compact bus servo control board designed for robotics, automation and embedded motion-control applications. Based on an ESP32 controller, the board combines serial bus servo control with built-in WiFi, Bluetooth and ESP-NOW connectivity, providing flexible options for local programming, wireless control and servo debugging.

The board can theoretically control up to 253 SC and ST series serial bus servos simultaneously, provided that an adequate power supply is available. It can also retrieve important servo information such as current angle, load, voltage and operating mode, making it particularly useful for robotic systems where feedback from individual servos is required.

Through the supported WEB application, users can control bus servos and access functions for changing servo IDs and working modes. Servos can be configured between servo mode and motor mode, providing additional flexibility for different robotic mechanisms and movement requirements.

An onboard OLED display provides a convenient way to show key information directly on the controller board. The board also includes a UART control interface for communication with an upper computer, making it suitable for use as the lower-level controller in larger robotic systems.

With a compact 65 × 30 mm footprint, the board is designed to save space and can be integrated into a variety of robot structures, including robotic arms, hexapod robots, humanoid robots and wheeled robots.

Key Features

• ESP32-based bus servo control board
• Built-in WiFi connectivity
• Built-in Bluetooth connectivity
• Supports ESP-NOW wireless communication
• Controls up to 253 SC and ST series serial bus servos theoretically
• Suitable for simultaneous servo control when adequate power is supplied
• Supports servo ID programming
• Supports servo working-mode configuration
• Supports servo mode and motor mode
• Can read servo angle information
• Can read servo load information
• Can read servo voltage information
• Can read servo operating mode information
• WEB application support for servo control and debugging
• Open-source WEB application support
• UART interface for communication with an upper computer
• Type-C programming/download interface
• Automatic download circuit for easier program uploading
• Onboard OLED display for key information
• Compact 65 × 30 mm design
• Suitable for space-limited robotic projects
• Suitable for a variety of robot structures

Technical Specifications

• Product Type: ESP32 Servo Driver Expansion Board
• Controller: ESP32
• Servo Type: SC and ST series serial bus servos
• Maximum Servo IDs: Up to 253 servos theoretically
• Control Interface: UART
• Download Interface: USB Type-C
• Wireless Connectivity: WiFi and Bluetooth
• Wireless Feature: ESP-NOW
• Supply Voltage: DC 6-12V
• Servo Voltage: Input voltage and servo voltage must match
• Power Connector: 5.5 × 2.1 mm DC connector
• Board Dimensions: 65 × 30 mm
• Fixing Hole Diameter: 3.0 mm
• Mounting Hole Size: 2.75 mm
• Mounting Hole Spacing: 23 × 58 mm
• Display: Onboard OLED
• Programming: Automatic download circuit
• Servo Feedback: Angle, load, voltage, mode and other information

Servo Control

The board is designed to communicate with serial bus servos and provides centralised control for multi-servo robotic systems. Up to 253 SC and ST series serial bus servos can theoretically be controlled by the system, although the practical number of servos that can be operated simultaneously depends on the available power supply and the requirements of the connected servos.

The board can also read feedback information from compatible servos, including:

• Current servo angle
• Servo load
• Servo voltage
• Servo operating mode
• Other available servo information

This feedback capability allows the controller to be used in applications where monitoring the position and operating condition of individual servos is important.

Servo Programming and Configuration

The ESP32 Servo Driver Expansion Board supports programming functions for compatible bus servos. Users can configure servo IDs and change the operating mode of supported servos.

The available working modes include:

• Servo Mode
• Motor Mode

This makes the board suitable for experimenting with different robotic mechanisms and control configurations.

Wireless Connectivity

Built-in WiFi and Bluetooth provide convenient wireless connectivity for robotics and embedded projects. The board also supports ESP-NOW, providing another wireless communication option for compatible ESP32-based systems.

Wireless connectivity can be used for remote control, servo testing, debugging and communication within robotic projects.

WEB Control

The board is supplied with support for a WEB application that can be used to control and debug compatible bus servos. This provides a convenient interface for testing servo operation and developing robotic applications.

Open-source WEB application support and example resources can also assist developers when building their own systems around the board.

OLED Display

An onboard OLED display provides a convenient method of presenting key information directly on the controller board. This can be useful when testing servos, debugging robotic mechanisms or monitoring system information without requiring a separate display.

Programming and Development

The board includes an automatic download circuit, simplifying the process of uploading programs during development. The USB Type-C download interface provides a modern and convenient connection for programming and development.

A UART interface is also provided for communication with an upper computer. This allows the board to operate as a lower-level controller within a larger robotic control system.

Power Requirements

The board accepts a DC 6-12V input through its 5.5 × 2.1 mm DC power connector.

Important: The input voltage and the servo voltage must match. An adequate power supply is also required when controlling multiple servos. The actual number of servos that can be operated simultaneously depends on the power requirements of the connected servos and the available power supply.

Compact Design

Measuring only 65 × 30 mm, the board provides servo control and wireless functionality in a compact footprint. Its small size makes it suitable for integration into robots and other projects where available installation space is limited.

The board includes mounting holes with 23 × 58 mm spacing, allowing it to be securely installed within compatible mechanical assemblies.

Applications

The WVS ESP32 Servo Driver Expansion Board is suitable for:

• Robotic arms
• Hexapod robots
• Humanoid robots
• Wheeled robots
• Multi-servo robotic systems
• Robot prototypes
• Servo testing and debugging
• Motion-control projects
• Educational robotics
• ESP32 robotics projects
• Wireless servo control
• Robotic mechanism development
• Custom automation projects
• Embedded motion-control systems

Package Contents

• 1 × WVS ESP32 Servo Driver Expansion Board

Important Notes

• Maximum control capacity is up to 253 compatible SC and ST series serial bus servos theoretically.
• An adequate power supply is required when operating multiple servos.
• The input voltage and servo voltage must match.
• Servo compatibility depends on the connected servo model and its supported communication protocol.
• Servos, USB cables, power supplies and other external accessories are not included unless specifically stated in the product package.

What's in the box
1 x WVS ESP32 Servo Driver Expansion Board WiFi Bluetooth 253 Servos