Basic SwitchesRecognition Module HLKV20 Intelligent Recognition Chip Custom Wake Word Control Module Feature: 1. Materials: 32bit RISC , operating frequency 240M, support DSP instruction set and FPU floating point arithmetic unit. 2. Support Calculation: Support up to 1024 points complex FFT IFFT calculation or 2048 points real FFT IFFT calculation. 3. Applicable Scenarios: Used in smart homes, all kinds of smart home appliances, 86 boxes, toys, lamps, industrial, Internet of Things, automobiles, security and lighting and other products that require control. 4. DIY Gifts: Very suitable for making gifts, cards and handicrafts for your own speech. 5. Versatile: It is very suitable for adding sound effects to models, photo frames and displays. Specification: Item Type: Recognition ModuleMaterial: PCBModel: HLK-V20Working Voltage: DC 5V (USB Power Supply)Audio Input and Output:Support 1 Analog Microphone InputSupport Dual Channel Dac OutputSupport I2s Input OutputPurpose: for Speech RecognitionApplicable Scenarios: Used in Smart Homes, All Kinds of Smart Home Appliances, 86 Boxes, Toys, Lamps, Industrial, Internet of Things, Automobiles, Security and Lighting, and Other Products That Require Control Package List: 1 x Recognition Module 1 x Pin Header Note: Do not use it in an electrostatic environment, which may damage electronic components How to use: The demo firmware supports wakeup words: Xiaoke Xiaoke, Xiaoling Xiaoling, Hello Lamp, 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 order word "turn on the conditioner", the bottom D4 will light up, corresponding to the B7 pin on the module, use the order word "turn off the conditioner", and the D4 light will go out. 3. Use the order word "turn