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Home / Development, Learning, Evaluation & Industrial Control Boards / Huaer Open-Source 6-Channel Servo Controller, ESP32/STM32/51 Robot Arm with Bluetooth, Development Board

Attributes

Brand -
Category Robotics / STEM Teaching Tools / Development, Learning, Evaluation & Industrial Control Boards
Origin -
Microcontroller ESP32 / STM32 / 8051 Compatible
Channel Count 6 Independent PWM Channels
Connectivity Bluetooth 4.0 BLE & USB Type-C
Input Voltage 5V - 12V DC
Max Current per Channel 2.5A
Communication Protocol UART, I2C, GPIO
Software Support Arduino IDE, MicroPython, C++
PCB Dimensions 65mm x 45mm x 18mm
License Type Open Source Hardware (OSHW)
Application Focus Robot Arms, Hexapods, Pan-Tilt Units

6 reviews

A

Anonymous

Mar 26, 2026

Rating: 5/5

Perfect for my hexapod project

The Bluetooth connectivity works flawlessly with my Android phone. The documentation is clear, and the open-source nature allowed me to tweak the firmware for smoother servo movement.

A

Anonymous

Mar 25, 2026

Rating: 5/5

Developer friendly

Being open-source is a huge plus. I could inspect the schematics and modify the code to fit my specific latency requirements. Highly recommended for educational purposes.

A

Anonymous

Mar 19, 2026

Rating: 5/5

Reliable for prototyping

We used this for a quick industrial proof-of-concept. The stability of the ESP32 module combined with the dedicated servo driver circuitry made our testing phase very smooth.

A

Anonymous

Mar 04, 2026

Rating: 5/5

Solid build quality

I was worried about the heat dissipation under load, but the board stays cool even when driving four servos simultaneously. The screw terminals are secure and easy to use.

A

Anonymous

Mar 02, 2026

Rating: 4/5

Great value, minor learning curve

Excellent board for the price. It took me a little while to configure the STM32 environment, but once set up, the 6 channels provide plenty of power for small robotic arms.

A

Anonymous

Mar 01, 2026

Rating: 4/5

Good starter board

As someone new to embedded systems, this board was approachable. The example codes helped me get my first robot arm moving within an hour. Would give 5 stars if the cable was included.

5 FAQ

Q: Can I daisy-chain multiple controllers?

A: Yes, you can daisy-chain multiple units via the UART interface to control more than 6 servos in a synchronized manner.

Q: Does this board support Python programming?

A: Yes, the ESP32 version fully supports MicroPython, allowing you to write control scripts in Python easily.

Q: What is the maximum voltage I can supply to the servo rail?

A: The servo rail supports input voltages from 5V up to 12V DC. Please ensure your servos are rated for the voltage you select.

Q: Where can I find the schematic diagrams?

A: Since this is an open-source project, all schematic diagrams and PCB files are available in the GitHub repository linked in the product description.

Q: Is the Bluetooth range sufficient for outdoor use?

A: The typical indoor range is about 10 meters, and outdoors with line-of-sight, it can reach up to 30 meters depending on environmental interference.

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