Ai-Thinker VC-02 Offline Speech Recognition Control Module
₹661
In stock
- AI and Voice Module for offline speech recognition.
- Model: Ai-Thinker VC-02-Kit.
- Operates with a 5V supply voltage.
- Current consumption: 500mA.
- Supports various communication interfaces like UART, I2C, DAC, PWM.
Description
Ai-Thinker VC-02 is a low-cost, high-efficiency offline voice recognition breakout module engineered for smart hardware and home automation applications. Unlike cloud-dependent voice assistants (such as Alexa or Google Assistant), the VC-02 processes all acoustic algorithms locally on-chip, guaranteeing instant response times, complete user privacy, and uninterrupted operation without a Wi-Fi or internet connection.
At the heart of the VC-02 module is the US516P6 single-core 32-bit RISC processor, operating at up to 240 MHz with specialized floating-point instructions for acoustic signal processing. The module integrates a high-precision microphone input interface, built-in noise suppression, and an onboard power amplifier capable of directly driving an external 8Ω / 1W or 4Ω / 2W speaker for voice prompts and TTS responses.
Technical Specifications
| Parameter | Specification |
| Main Processing IC | USI SoundAI US516P6 32-bit RISC Core @ up to 240 MHz |
| Recognition Capabilities | Offline Voice Recognition (Up to 150 local command phrases) |
| Acoustic Processing | Built-in Noise Reduction, Echo Cancellation, & Wake-Word Detection |
| Speech Synthesis (TTS) | Onboard Text-To-Speech engine for voice feedback |
| Operating Voltage | 3.6V to 5.5V DC (5.0V Recommended) |
| Operating Current | ~60 mA Active Processing (>100mA during speaker output) |
| Audio Interfaces | Analog Microphone Input (Electret Mic) & DAC Speaker Output |
| Onboard Power Amplifier | Mono Class-D Amplifier (Drives 8Ω/1W or 4Ω/2W speaker) |
| Communication Interface | UART (Default Baud Rate: 9600 bps or 115200 bps) |
| IO Expansion | Breaks out GPIO pins for direct relay / LED PWM control |
| Module Dimensions | ~25 mm × 18 mm |
Key Features & Highlights
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Zero-Cloud Dependency: Operates 100% offline—no Wi-Fi, routers, or subscription APIs required, providing zero network latency and maximum data privacy.
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Custom Wake-Word & Command Firmware: Supports firmware customization for personalized wake-up words, custom voice triggers, and localized voice prompts.
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Direct Speaker Output: Onboard Class-D audio amplifier directly drives small 8Ω/1W speakers for clear, audible spoken responses and beep feedback.
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Dual Control Modes: Can act as a slave sensor communicating command IDs to an external microcontroller (Arduino/ESP32 via UART) or operate standalone using its onboard GPIOs to trigger relays directly.
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High Recognition Accuracy: Advanced far-field noise-reduction algorithms maintain reliable command recognition even in moderately noisy indoor environments.
Common Applications
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Voice-controlled smart home lighting, ceiling fans, and home automation control panels.
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Internet-free voice command triggers for industrial machinery and medical equipment.
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Interactive STEM robotics, toys, and custom voice-prompt warning stations.
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Touchless elevator buttons, smart door access systems, and automated kiosks.
What’s Included in the Box
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1 × Ai-Thinker VC-02 Offline Speech Recognition Control Module
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1 × Electret Condenser Microphone
Why Buy From Aryabot?
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100% Authentic Component Sourcing: Guaranteed genuine Ai-Thinker modules sourced through verified manufacturing partners.
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Tested & Benchmarked: Quality-checked for UART communication, microphone input sensitivity, and audio amplifier output before dispatch.
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GST Invoice Provided: Tax-compliant B2B invoices generated for commercial deployments, corporate research, and academic orders.
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Pan-India Express Dispatch: Fast processing and direct shipping from our Noida distribution warehouse.
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