SKU: IOWC-0039
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AI-Thinker VC-02-Kit Offline Speech Recognition Module

₹679.00 (Inclusive of all taxes)
Out of Stock

The AI-Thinker VC-02-Kit is a development board for the VC-02 offline speech recognition module, powered by the Unisound US516P6 chip. It provides a 5V USB interface via CH340C for easy debugging and supports UART, I2C, PWM, and DAC for seamless integration into voice-controlled IoT systems.

Features

  • Offline recognition of up to 150 local voice commands without cloud dependency.
  • Powered by Unisound US516P6 32-bit RISC core with DSP & FPU, running at 240MHz.
  • Integrated CH340C USB-to-serial chip for straightforward programming and debugging.
  • Rich peripheral interfaces: Full-duplex UART (3Mbps), I2C, PWM, dual-channel DAC, and GPIO.
  • Includes onboard status LEDs (wake-up/cooling lamp) for visual feedback during development.

Out of stock

Description

The VC-02-Kit is a dedicated development platform for AI-Thinker’s VC-02 module, a cost-effective, pure offline speech recognition solution. The module’s core is the Unisound US516P6 voice chip, which features a 32-bit RISC architecture deeply integrated with a specialized DSP instruction set and FPU for efficient signal processing and floating-point operations, all optimized for standalone voice command interpretation.

This kit provides the essential hardware interface for developers, including a USB serial port for firmware updates and a basic command interface. The board’s design facilitates rapid prototyping of voice control functions, with all GPIOs configurable as interrupt inputs and wake-up sources, making it suitable for low-power listening applications. With 2MB of onboard Flash and 242KB of SRAM, it supports a lightweight RTOS and the storage of custom voice recognition models.

Key Features

  • Pure offline speech recognition for 150 pre-defined commands, ensuring privacy and reliability.
  • High-performance 240MHz 32-bit core with DSP extensions and FFT accelerator for real-time audio processing.
  • Comprehensive development interface with USB-to-serial conversion via CH340C.
  • Extensive memory resources: 2MB Flash for program/voice models and 242KB SRAM for high-speed operation.
  • Flexible I/O including a high-speed 3Mbps UART, I2C, PWM, and dual-channel DAC output.
  • Low-power design support with GPIO wake-up functionality for always-listening applications.
  • Onboard indicator LEDs for visual debugging of module states and command recognition.
  • Simple and friendly PC-based toolset for customizing and training voice command sets.

Applications

  • Smart home automation (voice-controlled lights, switches, and appliances).
  • Intelligent small household appliances (kettles, fans, air purifiers).
  • Voice-activated 86 wall switch boxes and smart panels.
  • Interactive toys and educational electronics with command-based control.
  • Voice-controlled lighting systems and smart lamps.
  • Industrial HMI interfaces for hands-free operation.

Technical Specifications

Core ProcessorUnisound US516P6 32-bit RISC
Operating Frequency240 MHz
Speech RecognitionOffline, 150 commands
Supply Voltage5V DC
Operating Current>500 mA
InterfacesUART, I2C, PWM, DAC, GPIO
UART SpeedUp to 3 Mbps
SRAM242 KB
Flash Memory2 MB
Operating SystemLightweight RTOS
Core FeaturesDSP instruction set, FPU, FFT accelerator

Frequently Asked Questions

How do I connect and program the VC-02-Kit development board?

Connect the board to a computer via the onboard USB port, which uses the CH340C chip. Install the CH340 driver if needed. Use the provided UART interface (TX/RX pins) and AI-Thinker's custom PC tools to send AT-like commands for configuration, train custom voice models, or update the firmware. The board operates on a 5V supply from the USB bus.

What is the process for training custom voice commands on the VC-02 module?

Use the manufacturer's proprietary software tools on a Windows PC. Connect the module via the kit's UART interface. The tool guides you through recording trigger words or phrases, which are then processed and stored in the module's 2MB Flash. You can map recognized commands to specific GPIO outputs or serial commands for system control, supporting up to 150 offline entries.

Can the VC-02 module operate in a low-power listening mode?

Yes, the VC-02 supports low-power states. Configure specific GPIO pins as interrupt wake-up sources. The module can enter a sleep mode while the core voice recognition circuit remains active at a lower power draw, listening for a trigger keyword. Upon detection, it fully wakes the 240MHz core to process the full command, enabling always-on voice interfaces.

What are the primary communication interfaces available on the VC-02-Kit?

The kit breaks out a full-duplex UART supporting up to 3Mbps for primary command and data exchange. It also provides I2C for connecting sensors, PWM for controlling motors or dimming LEDs, and a dual-channel DAC for analog audio output. All unused GPIOs are accessible for general-purpose input/output or external interrupt functions.

Package Includes

  • 1 x AI-Thinker VC-02-Kit Development Board

Additional Information

Weight 0.018 kg
Dimensions 10 × 6 × 2 cm