Ai-Thinker VC-02 is a low-cost offline voice recognition module based on the US516P6 voice chip, designed for offline voice control, smart home, small household appliances, 86 box panels, toys, lamps, and other embedded products that need local speech interaction. As part of the official Ai-Thinker VC series, the VC-02 focuses on full offline speech recognition, fast response, practical command customization, and easy deployment in cost-sensitive voice control scenarios. The Ai-Thinker VC-02 offline voice module supports up to 150 local voice commands, lightweight RTOS operation, and rich peripheral interfaces for embedded development. For developers building voice-controlled devices, offline speech interaction, and local command systems without cloud dependency, the VC-02 provides a compact and practical solution with strong value for voice-enabled products. Features Offline voice recognition module based on the US516P6 voice chip Low-cost voice control solution designed for embedded smart products and household devices Supports up to 150 local offline commands Uses a 32-bit RISC architecture core with DSP instruction support, FPU arithmetic unit, and FFT accelerator according to official materials Supports lightweight RTOS operation and user-friendly customization tools Rich interfaces including UART, I2C, PWM, SPI, and GPIO Built-in 2MB SPI flash for practical embedded voice application deployment Designed for offline speech recognition with no network connection required Suitable for rapid integration into smart home, appliances, lamps, toys, and voice-enabled control panels Specifications Parameter Details Brand Ai-Thinker Model VC-02 Core Chip US516P6 Product Type Offline voice recognition module Package SMD-20 Size 18 x 17 x 3.2 mm (+/-0.2 mm) Working Temperature -40C to 85C Storage Environment -40C to 125C, less than 90% RH Power Supply 3.6V to 5V, supply current above 500mA Interfaces UART, I2C, PWM, SPI, GPIO Available IO 10 UART Rate Default 115200bps SPI Flash Built-in 2MB Local Commands Up to 150 offline commands Applications Smart home products requiring offline voice control Small household appliances, lamps, toys, and voice-controlled gadgets 86 box panels and embedded control terminals with local speech interaction Projects that need offline speech recognition without cloud dependency IoT and industrial products needing low-cost local voice command capabilities Other Content Ai-Thinker VC-02 belongs to the official VC module series, which is positioned as an AI-enabled offline voice recognition solution family. Official series information emphasizes high wake-up recognition accuracy, longer wake-up range, low false activation rate, stronger anti-noise performance, faster response, and complete offline operation independent of networking. Compared with more feature-rich voice modules, the VC-02 offline voice module is positioned as a more cost-effective solution while still retaining practical local command support, embedded interfaces, and development friendliness. This makes the Ai-Thinker VC-02 useful for engineers building compact voice control products that need local operation and predictable offline behavior. Resources Ai-Thinker VC module series official topic page VC-02 specification Ai-Thinker offline voice modules overview VC module series firmware FAQ Does the VC-02 work without internet? Yes. The Ai-Thinker VC-02 is an offline voice recognition module, so it can execute local voice commands without relying on an internet connection. How many local commands does the VC-02 support? According to the official information, the VC-02 supports up to 150 local offline commands. What kind of products is the VC-02 suitable for? The Ai-Thinker VC-02 offline voice module is suitable for smart home, small household appliances, 86 box panels, toys, lamps, and other products that need local voice control. What interfaces are available on the VC-02? The official specification lists UART, I2C, PWM, SPI, and GPIO, which makes the module practical for embedded voice interaction projects.
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