HLK-V20 Voice Recognition Module Speaker+Microphone Test Kit
HLK-V20 test board is convenient for customers to intuitively experience the voice control LED lights and serial port output protocol data after voice recognition.
For English voice command words and wake-up words, please refer to HLK-V20 Demo firmware command words and broadcast words (English version) V1.0.xlsx.
HLK-V20 is a high-performance pure offline voice recognition module newly launched by Hi-link Electronics, according to a large number of pure offline control scenarios and products. It can be widely and quickly applied to smart homes, various smart small home appliances, toys, lamps.
Suitable for industrial, medical, IoT, automotive, security and lighting products that require voice control.
The module uses a 32-bit RSIC architecture core and adds a DSP instruction set specifically for signal processing and speech recognition, an FPU processing unit that supports floating-point operations, and an FFT accelerator. The audio signal is trained and learned through the neural network to improve the audio signal recognition ability.
The solution includes offline recognition of 150 local commands, background-free configuration of wake words, command words and broadcast response words, lightweight RTOS systems, It supports rich environmental interfaces and simple and user-friendly customized tools.
Use the USB data cable to power on the test board and connect external speakers and microphones.
After the module wakes up, use the command word "turn on the air conditioner", the LED on the bottom panel will turn on; When you use the command word "turn off the air conditioner" the LED light will turn off.
Use the command word "turn on the light" to turn on the LED on the bottom panel and use the command word "turn off the light" to turn off the LED.
Use the command word "Turn on the switch", the bottom panel LED will turn on, use the command word "Turn off the switch", the LED light will turn off.
Test Kit Serial port output protocol data after local voice recognition
Use the USB data cable to power on the Test Card and connect external speakers and microphones.
Open the serial port tool on the PC side; serial port configuration is 115200-8-N-1.
Use the word "wake-up" to wake up the device. After the module recognizes the wake-up word and the command word, it outputs the serial port protocol data. For details of serial port protocol data, please refer to HLK-V20 UART communication protocol description V1.0.pdf.
Technical Specifications
Core
32bit RISC core, operating frequency 240M
Supports DSP instruction set and FPU floating point operation unit
FFT accelerator: Supports complex FFT/IFFT operations up to 1024 points or true FFT/IFFT operations up to 2048 points
Customized audio algorithm operator
Storage
Onboard high-speed SRAM
Internal 2 MB FLASH
Audio input and output
Support 1 analog Microphone input, SNR≥94db
Supports 4 digital Microphone inputs
Supports dual-channel DAC output
I2S input/output support
Power supply and clock
Onboard 5V to 3.3V, 3.3V to 1.2V LDO to power the chip
RC 12MHz clock source and PLL phase-locked loop clock source
Set POR (Power On Reset), low voltage detection and monitoring
Environmental interface
Support up to 10 GPIOs
All GPIOs can be configured as external interrupt input and wake-up sources
1 standard SPI Master interface, the highest speed is 30MHz
1 SPI Slave interface with maximum speed of 30MHz
1 full-duplex UART with a maximum speed of 3 Mbps
1 I2C master/slave controller with a maximum speed of 400kHz
2 PWM outputs
1 12-bit SAR-ADC with maximum sample rate of 450KHz
Custom sound
Customize the launch announcement
Special voice wake-up words
Customize voice command words
Private TTS voice broadcast
Power amplifier output on the module, differential There are 16 pins including the initial input and serial port.
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