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    Home  -  Product  -  Microwave Sensor Series  -  Microwave sensor module

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    Microwave sensor module



    HW-US003 Offline speech recognition module

    HW-US003 Offline speech recognition module is our company's latest offline voice intelligent recognition module has a beautiful appearance, simple and compact product circuit structure, stable performance, affordable cost, and high cost-effectiveness. Especially suitable for secondary development in other electronic fields such as intelligent appliances, voice wake-up products, lighting products, etc.

    This product can be widely used in intelligent voice, intelligent control systems, voice lighting products, smart home control unit products, and so on.

    Online consultation

    2. Working principle of the product:

    HW-US003 is an intelligent voice controlled offline speech recognition module that does not require networking. It adopts an internal 32bit RS IC architecture and core computing logic. It collects and compiles text pronunciation through a microphone, accurately responds to customized wake-up words, outputs speaker voice broadcasts, and IO port signals. After speech acquisition and recognition, the output IO port signal can drive various circuits to work.

    3.Product features:

    3.1. This module has rich IO output protocols and supports various application products developed twice. The PCB structure is simple, and it supports self compiling wake-up unit words and customizing wake-up unit words.

    3.2. Support the compilation of Chinese and English unit word protocols, and download SDK files online. It has precise speech recognition function with wake-up words and anti false alarm function.

    3.3. Support repeated compilation and burning of CH340 downloader. Support multiple tone voice broadcasts, and support up to 150 unit vocabulary voice recognition broadcasts.

    3.4. Supports up to 10 GPIO ports for dynamic output, 1 12C master-slave controller, and multiple PWM ports for output. 1 SDR-ADC signal collector, etc

    3.5. Support SDK voice compilation, burning, and downloading.

    3.6. Support time timing settings.

    4. Parameters



    Intelligent speech recognition module




    3.3V customizable

    Output IO driver

    GPIO 3V/50-100mA

    Compilation required


    Voice command control output

    Wake up output broadcast

    GPIOhigh level


    4x1.5 microphone

    single microphone


    Chinese  -   English

    Wake up distance

    1-2m  40-60dB

    3-5m 60-90dB

    Default 80dB

    Wake up reaction time



    Wake up waiting time






    Number of voice entries




    Voice selector

    Men's Voice

    Ladies' Voice

    Default Ladies' Voice

    IO Port

    Please refer to Article 5

    Download Tools



    21mm x 15mm


    SMD -2.0mm x 24pin

    Operation temperature


    ambient temperature

    5. IO Port Definition:


    6.CAD drawings and patch drawings:






    10. Product Application:

    10.1. As a speech recognition module, this product can output driving signals and voice broadcasts as long as someone wakes up. Suitable for various types of electrical equipment.

    10.2. Example: (Automotive products: Xiaowang, Xiaowang, turn on the navigation or Xiaowang, Xiaowang, turn off the headlights.)

    10.3. Example: (Robot product: Xiao Wang, Xiao Wang, let the sweeping machine robot work or Xiao Wang, Xiao Wang, stop sweeping the floor.)

    10.4. Example: (Lamp products: Xiao Wang, Xiao Wang, turn on the bedroom light or Xiao Wang, Xiao Wang, turn off the bedroom light.)

    10.5. Example: (Electrical products: Xiao Wang, Xiao Wang, turn on the water heater or Xiao Wang, Xiao Wang, turn off the water heater.)

    10.6. Example: (Automotive products: Xiao Wang, Xiao Wang, turn on the navigation or Xiao Wang, Xiao Wang, turn off the headlights.)

    10.7. Example: (Smart home products: Xiao Wang, Xiao Wang, I'm back or Xiao Wang, Xiao Wang, I'm out.)


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