Ai-Thinker VC-02 Offline Speech Recognition Control Module

The Ai-Thinker VC-02 Offline Speech Recognition Control Module is a compact voice-control solution designed for electronics, robotics, smart-home, and embedded applications. It uses the Unisound US516P6 voice chip to process voice commands locally, so speech recognition does not require an internet connection or cloud service.

The VC-02 supports Chinese and English voice control and can recognize up to 150 local voice commands. Ai-Thinker also provides customization tools that allow developers to create their own wake words and command sets. The module supports wake-word self-learning without requiring firmware compilation, making it suitable for projects that need customized voice interaction.

For communication with a microcontroller or other embedded hardware, the VC-02 provides interfaces including UART, I2C, PWM, SPI, and GPIO. It also supports AEC (Acoustic Echo Cancellation) and steady-state noise reduction to improve voice recognition in practical applications. With a response time of less than 100 ms specified by Ai-Thinker, the module can be integrated into voice-controlled appliances, automation systems, robotics projects, toys, lamps, and other embedded devices.

The VC-02 is a speech-recognition module, while the VC-02-Kit is the corresponding development board designed to make testing, debugging, and firmware upgrading easier. This product listing should therefore be kept focused on the VC-02 voice-recognition solution rather than mixing in unrelated VC-01-Kit functions.

Features

• Offline Voice Recognition: Processes voice commands locally without requiring Wi-Fi, internet, or cloud services.
• Chinese & English Support: Ai-Thinker documents bilingual Chinese and English voice control.
• Up to 150 Commands: Supports up to 150 local voice-command keywords.
• Custom Wake Words: Supports wake-word self-learning and customization through Ai-Thinker’s development tools.
• Fast Response: Ai-Thinker specifies voice recognition response time of less than 100 ms.
• Multiple Interfaces: Provides UART, I2C, PWM, SPI and GPIO interfaces for embedded integration.
• Noise Reduction: Supports AEC and steady-state noise reduction for improved voice interaction.
• Embedded Voice Control: Suitable for smart-home devices, robotics, appliances, toys, lamps and other voice-controlled electronics.