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Ai-Thinker VC Voice Recongnition Modules

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Ai-Thinker VC Voice Recongnition Modules

Ai-Thinker Offline Speech Development Control Board

Add advanced voice control to your projects with Ai-Thinker VC Voice Recognition Modules, offering powerful offline speech recognition without internet dependency. Utilizing the US516P6 chip from Unisound, these modules support bilingual recognition (Chinese & English), ultra-fast command processing, and customizable wake-up words for smart home devices, interactive toys, and industrial voice control.

Choose the right variant for your application from compact modules to full development kits with USB debugging and status indicators.

Features:

  • 32-bit RISC core @ 240MHz with DSP and floating-point support

  • 2MB built-in flash, 242KB high-speed SRAM

  • Supports up to 150 custom voice commands offline

  • High SNR analog microphone input (≥94dB) and dual DAC audio output

  • Multilingual recognition: Chinese and English voice commands

  • Low power consumption, operating voltage 3.6V–5V

  • Supports UART, I2C, SPI, PWM, GPIO interfaces

  • RTOS-based SDK for easy development and integration

  • Fast recognition time under 100ms

  • Wake-up distance up to 5 meters (VC01 variant)

Variants Comparison Table

Feature VC01 VC02 VC01-Kit VC02-Kit
Core Chip US516P6 US516P6 US516P6 US516P6
Processor Speed 240MHz 240MHz 240MHz 240MHz
Offline Recognition Yes Yes Yes Yes
Languages Supported Chinese, English Chinese, English Chinese, English Chinese, English
Max Commands 150 150 150 150
Wake-Up Distance > 5 meters ~ 2 meters > 5 meters ~ 2 meters
Audio Input 1 Analog Mic (SNR≥94 dB) Supports Multi-channel Micro 1 Analog Mic + Wake-up Light Multi-channel Mic + Wake-up & Indicator Lights
Audio Output Dual DAC Dual DAC Dual DAC Dual DAC
IO Interfaces UART, I2C, SPI, PWM, GPIO UART, I2C, SPI, PWM, GPIO UART + USB (CH340C USB-to-Serial) UART + USB (CH340C USB-to-Serial)
Recognition Time < 100 ms < 100 ms < 100 ms < 100 ms
Power Supply 3.6V – 5V 3.6V – 5V 5V via USB 5V via USB
SDK RTOS-based RTOS-based RTOS-based RTOS-based
Dimensions 18x17x3.2mm 18x17x3.2mm 42.2x35.6mm 42.2x35.6mm
Additional Features Custom Wake-up Word Learning Custom Wake-up Word Learning Wake-up Light, Cooling Fan Wake-up Light, Cooling Fan

Ai-Thinker Offline Speech Development Control Board

Add advanced voice control to your projects with Ai-Thinker VC Voice Recognition Modules, offering powerful offline speech recognition without internet dependency. Utilizing the US516P6 chip from Unisound, these modules support bilingual recognition (Chinese & English), ultra-fast command processing, and customizable wake-up words for smart home devices, interactive toys, and industrial voice control.

Choose the right variant for your application from compact modules to full development kits with USB debugging and status indicators.

Features:

  • 32-bit RISC core @ 240MHz with DSP and floating-point support

  • 2MB built-in flash, 242KB high-speed SRAM

  • Supports up to 150 custom voice commands offline

  • High SNR analog microphone input (≥94dB) and dual DAC audio output

  • Multilingual recognition: Chinese and English voice commands

  • Low power consumption, operating voltage 3.6V–5V

  • Supports UART, I2C, SPI, PWM, GPIO interfaces

  • RTOS-based SDK for easy development and integration

  • Fast recognition time under 100ms

  • Wake-up distance up to 5 meters (VC01 variant)

Variants Comparison Table

Feature VC01 VC02 VC01-Kit VC02-Kit
Core Chip US516P6 US516P6 US516P6 US516P6
Processor Speed 240MHz 240MHz 240MHz 240MHz
Offline Recognition Yes Yes Yes Yes
Languages Supported Chinese, English Chinese, English Chinese, English Chinese, English
Max Commands 150 150 150 150
Wake-Up Distance > 5 meters ~ 2 meters > 5 meters ~ 2 meters
Audio Input 1 Analog Mic (SNR≥94 dB) Supports Multi-channel Micro 1 Analog Mic + Wake-up Light Multi-channel Mic + Wake-up & Indicator Lights
Audio Output Dual DAC Dual DAC Dual DAC Dual DAC
IO Interfaces UART, I2C, SPI, PWM, GPIO UART, I2C, SPI, PWM, GPIO UART + USB (CH340C USB-to-Serial) UART + USB (CH340C USB-to-Serial)
Recognition Time < 100 ms < 100 ms < 100 ms < 100 ms
Power Supply 3.6V – 5V 3.6V – 5V 5V via USB 5V via USB
SDK RTOS-based RTOS-based RTOS-based RTOS-based
Dimensions 18x17x3.2mm 18x17x3.2mm 42.2x35.6mm 42.2x35.6mm
Additional Features Custom Wake-up Word Learning Custom Wake-up Word Learning Wake-up Light, Cooling Fan Wake-up Light, Cooling Fan
Select Model
From $0.94

Original: $3.13

-70%
Ai-Thinker VC Voice Recongnition Modules—

$3.13

$0.94

Description

Ai-Thinker Offline Speech Development Control Board

Add advanced voice control to your projects with Ai-Thinker VC Voice Recognition Modules, offering powerful offline speech recognition without internet dependency. Utilizing the US516P6 chip from Unisound, these modules support bilingual recognition (Chinese & English), ultra-fast command processing, and customizable wake-up words for smart home devices, interactive toys, and industrial voice control.

Choose the right variant for your application from compact modules to full development kits with USB debugging and status indicators.

Features:

  • 32-bit RISC core @ 240MHz with DSP and floating-point support

  • 2MB built-in flash, 242KB high-speed SRAM

  • Supports up to 150 custom voice commands offline

  • High SNR analog microphone input (≥94dB) and dual DAC audio output

  • Multilingual recognition: Chinese and English voice commands

  • Low power consumption, operating voltage 3.6V–5V

  • Supports UART, I2C, SPI, PWM, GPIO interfaces

  • RTOS-based SDK for easy development and integration

  • Fast recognition time under 100ms

  • Wake-up distance up to 5 meters (VC01 variant)

Variants Comparison Table

Feature VC01 VC02 VC01-Kit VC02-Kit
Core Chip US516P6 US516P6 US516P6 US516P6
Processor Speed 240MHz 240MHz 240MHz 240MHz
Offline Recognition Yes Yes Yes Yes
Languages Supported Chinese, English Chinese, English Chinese, English Chinese, English
Max Commands 150 150 150 150
Wake-Up Distance > 5 meters ~ 2 meters > 5 meters ~ 2 meters
Audio Input 1 Analog Mic (SNR≥94 dB) Supports Multi-channel Micro 1 Analog Mic + Wake-up Light Multi-channel Mic + Wake-up & Indicator Lights
Audio Output Dual DAC Dual DAC Dual DAC Dual DAC
IO Interfaces UART, I2C, SPI, PWM, GPIO UART, I2C, SPI, PWM, GPIO UART + USB (CH340C USB-to-Serial) UART + USB (CH340C USB-to-Serial)
Recognition Time < 100 ms < 100 ms < 100 ms < 100 ms
Power Supply 3.6V – 5V 3.6V – 5V 5V via USB 5V via USB
SDK RTOS-based RTOS-based RTOS-based RTOS-based
Dimensions 18x17x3.2mm 18x17x3.2mm 42.2x35.6mm 42.2x35.6mm
Additional Features Custom Wake-up Word Learning Custom Wake-up Word Learning Wake-up Light, Cooling Fan Wake-up Light, Cooling Fan

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