Meadow.Foundation.Sensors.Motion.Mmc5603 1.3.2.4-beta

Meadow.Foundation.Sensors.Motion.Mmc5603

MMC5603 I2C 3 axis digital magnetometer

The MMC5603 library is designed for the Wilderness Labs Meadow .NET IoT platform and is part of Meadow.Foundation

The Meadow.Foundation peripherals library is an open-source repository of drivers and libraries that streamline and simplify adding hardware to your C# .NET Meadow IoT application.

For more information on developing for Meadow, visit developer.wildernesslabs.co, to view all Wilderness Labs open-source projects, including samples, visit github.com/wildernesslabs

Usage

private Mmc5603 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initialize...");

    sensor = new Mmc5603(Device.CreateI2cBus());

    // classical .NET events can  be used
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"Magnetic Field: [X:{result.New.X.MicroTesla:N2}," +
            $"Y:{result.New.Y.MicroTesla:N2}," +
            $"Z:{result.New.Z.MicroTesla:N2} (microTeslas)]");
    };

    // Example that uses an IObservable subscription to only be notified when the filter is satisfied
    var consumer = Mmc5603.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: [x] changed by threshold; new [x]: X:{result.New.X.MicroTesla:N2}, old: X:{result.Old?.X.MicroTesla:N2}"),
        // only notify if there's a greater than 1 micro tesla on the Y axis
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var
                return (result.New - old).Y > new MagneticField(1, MU.MicroTesla);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    return Task.CompletedTask;
}

public override async Task Run()
{
    //Read from sensor
    var result = await sensor.Read();

    //output initial readings text to console
    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info(
        $"Magnetic field: [X:{result.X.MicroTesla:N2}," +
        $"Y:{result.Y.MicroTesla:N2}," +
        $"Z:{result.Z.MicroTesla:N2} (microTeslas)]");

    sensor.StartUpdating(TimeSpan.FromMilliseconds(1500));
}