Attributes

Brand	-
Category	Electronic Components Market / Voice Recognition Modules
Origin	-
Recognition Mode	Offline Voice Recognition
Supported Languages	English, Mandarin Chinese
Max Command Count	Up to 50 customizable commands
Interface Type	UART / TTL Serial
Operating Voltage	3.3V - 5V DC
Microphone Input	Analog MIC with AGC support
Response Time	< 200ms average latency
Development Tool	Web-based configuration portal
Dimensions	45mm x 28mm x 6mm
Application Scenario	Smart Home, DIY Robotics, IoT Control

6 reviews

Anonymous

Mar 31, 2026

Rating: 4/5

Great value, minor documentation gaps

The hardware is solid and recognition accuracy is impressive even with background noise. I deducted one star because the English documentation could be more detailed regarding the serial protocol specifics, but the community forums helped.

Anonymous

Mar 26, 2026

Rating: 5/5

Perfect for offline projects

I needed a voice module that didn't rely on Wi-Fi for my smart lamp project. This ASR-PRO board works flawlessly. The setup via the web interface was intuitive, and recognizing custom commands took less than a minute to configure.

Anonymous

Mar 12, 2026

Rating: 5/5

Reliable and fast

Used this in a prototype for a customer demo. The response time is incredibly fast, and it hasn't failed once during testing. The fact that it runs entirely offline makes it secure and reliable for industrial applications.

Anonymous

Mar 11, 2026

Rating: 4/5

Good for educational kits

We bought ten of these for our workshop. Students found them easy to program. The only downside is that the microphone sensitivity needs careful adjustment in the config tool, otherwise it picks up too much ambient noise.

Anonymous

Mar 09, 2026

Rating: 5/5

Exceeded expectations

For the price point, the performance is outstanding. I replaced a cloud-based solution with this module to reduce latency, and the user experience improved significantly. Highly recommend for anyone building local-first smart devices.

Anonymous

Mar 02, 2026

Rating: 5/5

Easy integration with Arduino

Connected this to my Arduino Uno without any issues. The UART communication is stable, and the ability to train it to recognize specific phrases like 'Open Gate' or 'Start Motor' is exactly what I needed for my automation setup.

5 FAQ

Q: Does this module support connecting to an external speaker for voice feedback?

A: No, this module is designed for speech recognition only (input). It does not have Text-to-Speech (TTS) capabilities or an audio output pin for speakers.

Q: Can the module distinguish between different speakers?

A: No, the ASR-PRO performs command recognition based on phonetic patterns, not speaker verification. It will respond to the commanded phrase regardless of who speaks it.

Q: Can I add new voice commands after the initial setup without reflashing firmware?

A: Yes, you can add or modify voice commands at any time using the web-based configuration tool. Changes are saved directly to the module's memory instantly.

Q: What is the maximum distance for effective voice recognition?

A: Under normal indoor conditions with moderate noise, the effective range is approximately 3 to 5 meters. Using an external high-sensitivity microphone can extend this range.

Q: Is there a library available for ESP32 integration?

A: While we do not provide an official dedicated library, the module communicates via standard UART. Many users have successfully integrated it with ESP32 using standard Serial libraries available in the Arduino IDE.

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