What is Ai-Thinker NodeMCU-VC-02-KIT Offline Speech Recognition Module ?

The Ai-Thinker NodeMCU-VC-02-KIT Offline Speech Recognition Module is a development board specifically designed for the VC-02 module. It shares the same board with the VC-01-Kit. This development board incorporates a CH340C serial port to USB chip, which provides a basic debugging interface and a USB upgrade interface. It also features a wake-up light and a cooling lamp, which offer status indication and control instructions, thereby simplifying the debugging of control functions.

The VC-02 is a cost-effective, purely offline speech recognition module and utilizes the US516P6 voice chip, launched by Unisound, and consistently optimizes and innovates algorithms in speech recognition technology. The offline recognition algorithm and chip architecture are deeply integrated to offer ultra-affordable offline speech recognition solutions.

This module can be extensively and rapidly applied to a variety of products that require voice control, including smart homes, various smart small household appliances, boxes, toys, lamps, and more.

• Ai-Thinker NodeMCU-VC-02-KIT Offline Speech Recognition Module
• Incorporates a CH340C serial port to USB chip
• Utilizes the US516P6 voice chip for offline speech recognition
• Features a 32-bit RISC core running at 240 MHz
• Offers flexible configuration options for audio input and output
• Provides a complete RTOS SDK for convenient control protocol development
• Kernel: The product features a 32-bit RISC core running at 240 MHz. It supports DSP instruction set and FPU floating point operation unit
• FFT Accelerator: The product supports up to 1024-point complex FFT/IFFT operations or 2048-point real FFT/IFFT operations
• Unisound Customized Speech Algorithm Operator: The product includes a customized speech algorithm operator developed by Unisound
• Storage: The product has a built-in 242 KB high-speed SRAM and 2 MB FLASH
• Audio Input and Output: The product offers flexible configuration options for 1.8/2.8/3.3V IO. It supports 1 analog Mic input with a SNR≥94db and dual-channel DAC output. It also supports both Chinese and English voice commands
• Power Supply and Clock: The product supports 5V power input and has a built-in 5V to 3.3V, 3.3V to 1.2V LDO to power the chip. It uses an RC 12 MHz clock source and PLL locked loop clock source. It also includes built-in POR (Power on Reset), low voltage detection, and watchdog
• Peripheral: All GPIOs can be configured as external interrupt input and wake-up source. The product includes one full-duplex UART with a maximum rate of 3 Mbps. It also supports I2C DAC PWM and multiple interfaces
• SDK: The product provides a complete RTOS SDK and supports fast and convenient UART, I2C, and other control protocol development
• Working temperature: -40 to 85 ℃
• Storage environment: -40 to 125 ℃, < 90%RH
• Power supply: Supply voltage 5 V, current greater than 500 mA
• Interfaces: UART/I2C/PWM/DAC/GPIO
• IO: 5 GPIOs
• UART rate: UART1 default 115200 bps, UART0(IOB8) default 57600
• Flash: 2 MB (built-in)
• Support language: English and Chinese

 

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