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    ADXL345 - Accelerometer

    ADXL345 is a small, thin, low power, 3-axis accelerometer with high resolution (13-bit) measurement at up to ±16g.

    Documentation

    In Chinese

    In English

    Sensor Image

    sensor

    Usage

    Important: make sure you properly setup the SPI pins especially for ESP32 before creating the SpiDevice, make sure you install the nanoFramework.Hardware.ESP32 nuget:

    //////////////////////////////////////////////////////////////////////
    // when connecting to an ESP32 device, need to configure the SPI GPIOs
    // used for the bus
    Configuration.SetPinFunction(21, DeviceFunction.SPI1_MOSI);
    Configuration.SetPinFunction(22, DeviceFunction.SPI1_MISO);
    Configuration.SetPinFunction(23, DeviceFunction.SPI1_CLOCK);
    // Make sure as well you are using the right chip select
    

    For other devices like STM32, please make sure you're using the preset pins for the SPI bus you want to use. The chip select can as well be pre setup.

    SpiConnectionSettings settings = new SpiConnectionSettings(1, 42)
    {
        ClockFrequency = Adxl345.SpiClockFrequency,
        Mode = Adxl345.SpiMode
    };
    
    var device = SpiDevice.Create(settings);
    
    // set gravity measurement range ±4G
    using (Adxl345 sensor = new Adxl345(device, GravityRange.Range04))
    {
        // read acceleration
        Vector3 data = sensor.Acceleration;
    
        //use sensor
    }
    

    Example

    Hardware Required

    • ADXL345
    • Male/Female Jumper Wires

    Circuit

    cicuit

    • VCC - 3.3 V
    • GND - GND
    • CS - CS
    • SDO - SPI1 MISO
    • SDA - SPI1 MOSI
    • SCL - SPI1 SCLK

    Code

    SpiConnectionSettings settings = new SpiConnectionSettings(1, 42)
    {
        ClockFrequency = Adxl345.SpiClockFrequency,
        Mode = Adxl345.SpiMode
    };
    var device = SpiDevice.Create(settings);
    
    // Set gravity measurement range ±4G
    using (Adxl345 sensor = new Adxl345(device, GravityRange.Range04))
    {
        // loop
        while (true)
        {
            // read data
            Vector3 data = sensor.Acceleration;
    
            Debug.WriteLine($"X: {data.X.ToString("0.00")} g");
            Debug.WriteLine($"Y: {data.Y.ToString("0.00")} g");
            Debug.WriteLine($"Z: {data.Z.ToString("0.00")} g");
            Debug.WriteLine();
    
            // wait for 500ms
            Thread.Sleep(500);
        }
    }
    

    Result

    running result

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