Waveshare Serial Bus Servo Driver HAT

Serial bus servo driver HAT

Designed for Serial Bus Servos, Integrates ESP32 and Servo Control Circuit

Allows controlling up to 253 serial bus servos at the same time via ESP32 UART or USB port, can be used as the main controller of the robotics projects

Features at a glance

• Allows controlling up to 253 ST / RSBL series serial bus servos at the same time
• 9~25V wide voltage input (the input voltage and the servo voltage must be matched)
• Based on the ESP32-WROOM-32 module, supports wired and wireless communication
• Provides multiple control demos for different host controllers
• Supports controlling the serial bus servos directly via onboard USB Type-C port
• Supports connecting to Raspberry Pi, powering the Pi via integrated 5V buck regulator circuit and communicating through GPIO UART interface, neat cable management

Specifications

Application examples

• Servos will provide various feedback like position, speed, torque lock, and operating mode (servo mode, servo motor mode, etc.) for advanced projects requiring closed-loop automatic control
• The host controller can control the serial bus servos by sending JSON commands and obtain feedback information in JSON format, more convenient for secondary development.
• The ideal choice for building quadruped robots, hexapod walkers, robotic arms, and other robotic projects requiring multiple servos

* images here are for reference ONLY

Compatible Servos

Supports ST / RSBL series bus servos and selecting power supply input according to the servo used

ST3215 Servo

 
ST3215-HS
Servo Motor
 
ST3025 Servo

 
ST3020 Servo

RSBL45-24

 
RSBL85-12

 
RSBL85-24

 
RSBL120-24

Note: When using the different servo models at the same time, please pay attention to whether the power input can meet the requirements of all the servos.

UART serial bus control

Allows controlling up to 253 serial bus servos at the same time

* for reference only, the servos in the picture are NOT included.

Note: though one channel UART can control up to 253 bus servos, due to the high power of the servos, it is necessary to consider whether the power supply solution is enough when using too many servos.

Wired Control Mode

Supports sending JSON commands to ESP32 for controlling the serial bus servos, or directly sending control commands to the servos via USB Type-C port. Comes with Python demo.

Wireless Control Mode

The Bus Servo Driver HAT (A) Will Automatically Establish A Hotspot after Powering on, Allows Users To Connect And Control The Driver board Via Mobile Phones, Tablets And PCs with the Cross-Platform Web Application we provided

Suitable for Raspberry P 5 / 4B

Supports powering the Pi and communicating through GPIO UART interface, neat cable management

 

ESP32 Controller, Extensive Resources
Easy Secondary Development

Built-In WiFi And Bluetooth, As Well As ESP-NOW Support, For Remote Control And Servo Debugging

What's On Board

1. ESP32 module
2. DCDC 5V buck regulator
3. UART control switch
4. Reset button
5. BOOT button
   for entering the downloading mode
6. Raspberry Pi 40PIN header
7. ESP32 Type-C port

1. Serial bus servo Type-C port
2. XT60 connector
3. 5.5×2.5 DC power jack
4. Power supply screw terminal
5. RS485 serial bus servo header
6. TTL serial bus servo headers

Outline dimensions

Resources & Services

Wiki: www.waveshare.com/wiki/Bus_Servo_Driver_HAT_(A)