SKU: IOWC-0038
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AI-Thinker VC-01 Offline Voice Recognition Module

₹299.00 (Inclusive of all taxes)
Out of Stock

The AI-Thinker VC-01 is a low-cost, pure offline speech recognition module built around the Unisound US516P6 chip, featuring a 240MHz 32-bit RISC core with DSP and FPU for embedded voice control applications.

Features

  • Offline recognition of 150 local voice commands without cloud dependency.
  • Powered by Unisound US516P6 chip with 240MHz 32-bit RISC core, DSP, and FPU.
  • Integrated FFT accelerator for efficient 1024-point complex FFT/IFFT operations.
  • Rich peripheral interfaces including UART, I2C, PWM, SPI, and GPIO for easy system integration.
  • Compact SMD-24 package (25.5 x 24mm) with wide operating temperature range (-40°C to 85°C).

Out of stock

Description

The VC-01 module from AI-Thinker provides a dedicated hardware solution for adding offline voice control to IoT devices. It leverages the Unisound US516P6 system-on-chip, which deeply integrates a custom speech recognition algorithm operator with a high-performance 32-bit processor core, enabling rapid, on-device command parsing.

Designed for cost-sensitive mass production, the module operates on a 3.6V to 5V supply and includes 2MB of built-in SPI Flash. Its architecture supports a lightweight RTOS and offers a full suite of serial and digital interfaces, allowing developers to seamlessly add voice triggers to smart home appliances, toys, and lighting systems without relying on network connectivity.

Key Features

  • Ultra-low-cost offline speech recognition solution for embedded products.
  • High-performance 240MHz 32-bit RISC core with DSP instruction set and FPU.
  • Integrated FFT accelerator supports 1024-point complex or 2048-point real FFT/IFFT.
  • Supports up to 150 locally stored voice commands for immediate response.
  • Runs a lightweight real-time operating system (RTOS) for deterministic performance.
  • Comprehensive peripheral set: UART, I2C, PWM, SPI, and multiple GPIOs.
  • Robust design with built-in POR, low-voltage detection, and watchdog timer.
  • Wide operating voltage (3.6V-5V) and temperature range (-40°C to 85°C).

Applications

  • Smart home automation voice control interfaces.
  • Voice-activated smart small household appliances (kettles, fans).
  • Embedded voice control for 86-type wall switch boxes.
  • Interactive educational toys and electronic games.
  • Voice-controlled lighting systems and smart lamps.
  • Industrial equipment with hands-free command operation.

Technical Specifications

Core ProcessorUnisound US516P6, 240MHz 32-bit RISC with DSP & FPU
Recognition TypeOffline, 150 local commands
Supply Voltage3.6V to 5V
InterfacesUART, I2C, PWM, SPI, GPIO
Default UART Baud Rate115200 bps
Onboard Storage2MB SPI Flash
Operating Temperature-40°C to 85°C
Storage Temperature-40°C to 125°C
Dimensions (L x W)25.5 mm x 24 mm
PackageSMD-24

Frequently Asked Questions

How do I communicate with the VC-01 module to send and receive commands?

The primary communication interface is UART, configured by default at 115200 baud (8N1). Send predefined voice command trigger codes or configuration packets via the TX/RX lines. The module will return recognition results or status messages on the same UART. You can also use the I2C or SPI interfaces for alternative data exchange, as detailed in the Unisound SDK documentation for the US516P6 platform.

Can I add custom voice commands to the VC-01 module?

Yes, you can customize the 150 supported offline commands using Unisound's proprietary development tools. The process involves recording training samples, generating acoustic models, and flashing the updated firmware onto the module's built-in 2MB SPI Flash. This typically requires the vendor's SDK and a USB-to-UART adapter for connecting the module to a PC during the training and programming workflow.

What is the power consumption of the VC-01 module during operation?

While specific current draw figures aren't provided in the public datasheet, the module is designed for low-power, always-listening applications typical of offline voice chips. Expect active recognition current in the tens of milliamps range when powered from 3.6V to 5V. For lowest power, implement hardware control via a GPIO to put the module into a deep sleep mode when voice interaction is not required, as supported by the chip's internal power management units.

Package Includes

  • 1 x AI-Thinker VC-01 Speech Recognition Module

Additional Information

Weight 0.004 kg
Dimensions 2.55 × 2.4 × 0.32 cm