HLK voice switch module

LC-HLK-Relay-1R

1. Overview

。HLK-V20 is the latest high-performance pure offline speech recognition module for a large number of pure offline control scenarios and products. It can be widely and quickly applied to smart homes, various smart small appliances, 86 boxes, toys, lamps, industrial, medical, Products that require voice control, such as the Internet of Things, automobiles, security and lighting. The module uses a 32bit RSIC architecture core, and adds a DSP instruction set specifically for signal processing and speech recognition, an FPU arithmetic unit that supports floating-point operations, and an FFT accelerator. The audio signal is trained and learned through the neural network to improve the voice signal Recognition ability. The solution supports offline recognition of 150 local commands, can freely customize wake-up words, command words and response broadcast words, and has a wealth of peripheral interfaces. Add a relay to the bottom plate to control high-power electrical appliances.

2. functional characteristics

Processing kernel:

●32bit RISC core, running frequency 240M

● Support DSP instruction set and FPU floating point arithmetic unit

● FFT accelerator: supports up to 1024 points of complex FFT/IFFT operations or 2048 points of real FFT/IFFT operations Calculate

● Customized speech algorithm operator

storage:

● Built-in high-speed SRAM

● Built-in 2MB FLASH

Audio input and output:

● Support 1 analog Mic input

● Support dual channel DAC output

● Support I2S input/output

三、 Hardware introduction and description

Board size ：31*75mm

weight ：36g

Description of the physical picture of the board function:

1. instructions for use

The HLK-V20 supporting test board is convenient for customers to intuitively experience voice control LED lights, and serial port output protocol data after voice recognition. The demo firmware supports voice wake-up words: Xiaoke Xiaoke, Xiaoling Xiaoling, Hello Lamp, Hello Rubik's Cube, Xiaohai Xiaohai.

1、 Use the USB data cable to supply power to the test board, and connect external speakers and microphones.

2、 After the module wakes up, use the command word "turn on the air conditioner", the bottom plate D4 will light up, corresponding to the B7 pin on the module, use the command word "turn off the air conditioner", and the D4 light will go out.

3、 Use the command word "turn on the light", the base plate D3 will light up, corresponding to the B6 pin on the module, use the command word "turn off the light", and the D3 light will go out.

4、 Use the command word "turn on the switch", the base plate D2 will light up, corresponding to the B2 pin on the module, use the command word "turn off the switch", and the D2 light will go out.

5、In the factory demo firmware, only the above 3 pins have actions, and none of the other pins have actions.

This module also has a relay. Customers can connect pin B2 to RELAY (relay control pin), or B6 to RELAY, or B7 to RELAY

through the short-circuit cap.

In the picture, the shorting cap is connected to B6 and RELAY, because the command word "turn on the light" can directly control the switch of the relay without the wake-up word "Xiaoling Xiaoling". If the short cap jumps on B2 and B7, you need to wake up first and then control. It should be noted that the LED lights D2, D3, and D4 are 3.3v and 5v respectively. The voltage difference will cause the light to be slightly bright, and it can be used normally without affecting the function.