nanoFramework.Iot.Device.Lsm9Ds1 1.2.631

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dotnet add package nanoFramework.Iot.Device.Lsm9Ds1 --version 1.2.631                
NuGet\Install-Package nanoFramework.Iot.Device.Lsm9Ds1 -Version 1.2.631                
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="nanoFramework.Iot.Device.Lsm9Ds1" Version="1.2.631" />                
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add nanoFramework.Iot.Device.Lsm9Ds1 --version 1.2.631                
#r "nuget: nanoFramework.Iot.Device.Lsm9Ds1, 1.2.631"                
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install nanoFramework.Iot.Device.Lsm9Ds1 as a Cake Addin
#addin nuget:?package=nanoFramework.Iot.Device.Lsm9Ds1&version=1.2.631

// Install nanoFramework.Iot.Device.Lsm9Ds1 as a Cake Tool
#tool nuget:?package=nanoFramework.Iot.Device.Lsm9Ds1&version=1.2.631                

LSM9DS1 - 3D accelerometer, gyroscope and magnetometer

LSM9DS1 internally uses 2 buses:

  • Accelerometer and gyroscope
  • Magnetometer

and therefore functionality has been split into 2 classes which allows using them independently.

Documentation

  • You can find the datasheet here

Usage

Important: make sure you properly setup the I2C pins especially for ESP32 before creating the I2cDevice, make sure you install the nanoFramework.Hardware.ESP32 nuget:

//////////////////////////////////////////////////////////////////////
// when connecting to an ESP32 device, need to configure the I2C GPIOs
// used for the bus
Configuration.SetPinFunction(21, DeviceFunction.I2C1_DATA);
Configuration.SetPinFunction(22, DeviceFunction.I2C1_CLOCK);

For other devices like STM32, please make sure you're using the preset pins for the I2C bus you want to use.

Accelerometer and gyroscope

class Program
{
    public const int I2cAddress = 0x6A;

    static void Main(string[] args)
    {
        using (var ag = new Lsm9Ds1AccelerometerAndGyroscope(CreateI2cDevice()))
        {
            while (true)
            {
                Debug.WriteLine($"Acceleration={ag.Acceleration}");
                Debug.WriteLine($"AngularRate={ag.AngularRate}");
                Thread.Sleep(100);
            }
        }
    }

    private static I2cDevice CreateI2cDevice()
    {
        var settings = new I2cConnectionSettings(1, I2cAddress);
        return I2cDevice.Create(settings);
    }
}

Magnetometer

class Magnetometer
{
    public const int I2cAddress = 0x1C;

    public static void Run()
    {
        using (var m = new Lsm9Ds1Magnetometer(CreateI2cDevice()))
        {
            Debug.WriteLine("Calibrating...");
            Debug.WriteLine("Move the sensor around Z for the next 20 seconds, try covering every angle");
            Stopwatch sw = Stopwatch.StartNew();
            Vector3 min = m.MagneticInduction;
            Vector3 max = m.MagneticInduction;
            while (sw.ElapsedMilliseconds < 20 * 1000)
            {
                Vector3 sample = m.MagneticInduction;
                min = Vector3.Min(min, sample);
                max = Vector3.Max(max, sample);
                Thread.Sleep(50);
            }
            Debug.WriteLine("Stop moving for some time...");
            Thread.Sleep(3000);
            const int intervals = 32;
            bool[,] data = new bool[32,32];
            Vector3 size = max - min;
            int n = 0;
            while (true)
            {
                n++;
                Vector3 sample = m.MagneticInduction;
                Vector3 pos = Vector3.Divide(Vector3.Multiply((sample - min), intervals - 1), size);
                int x = Math.Clamp((int)pos.X, 0, intervals - 1);
                int y = Math.Clamp((int)pos.Y, 0, intervals - 1);
                data[x, y] = true;
                if (n % 10 == 0)
                {
                    Debug.WriteLine("Now move the sensor around again but slower...");
                    for (int i = 0; i < intervals; i++)
                    {
                        for (int j = 0; j < intervals; j++)
                        {
                            if (i == x && y == j)
                            {
                                Debug.Write('#');
                            }
                            else
                            {
                                Debug.Write(data[i, j] ? '#' : ' ');
                            }
                        }
                        Debug.WriteLine();
                    }
                }
                Thread.Sleep(50);
            }
        }
    }

    private static I2cDevice CreateI2cDevice()
    {
        var settings = new I2cConnectionSettings(1, I2cAddress);
        return I2cDevice.Create(settings);
    }
}
Product Compatible and additional computed target framework versions.
.NET Framework net is compatible. 
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