Meadow.Foundation.Sensors.Motion.Adxl3xx 1.3.2-beta

Meadow.Foundation.Sensors.Motion.Adxl3xx

ADXL3xx Analog and I2C 3-axis accelerometers (ADXL335, ADXL345, ADXL337, ADXL362, ADXL377)

The Adxl3xx 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

Adxl335 sensor;

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

    // create the sensor driver
    sensor = new Adxl335(Device.Pins.A00, Device.Pins.A01, Device.Pins.A02, null);

    // classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"Accel: [X:{result.New.X.MetersPerSecondSquared:N2}," +
            $"Y:{result.New.Y.MetersPerSecondSquared:N2}," +
            $"Z:{result.New.Z.MetersPerSecondSquared:N2} (m/s^2)]");
    };

    // Example that uses an IObservable subscription to only be notified when the filter is satisfied
    var consumer = Adxl335.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: [x] changed by threshold; new [x]: X:{result.New.X:N2}, old: X:{result.Old?.X:N2}"),
        // only notify if there's a greater than 1G change in the Z direction
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                return ((result.New - old).Z > new Acceleration(1, AU.Gravity));
            }
            return false;
        });
    sensor.Subscribe(consumer);

    return Task.CompletedTask;
}

public async override Task Run()
{
    var result = await sensor.Read();
    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($"Accel: [X:{result.X.MetersPerSecondSquared:N2}," +
        $"Y:{result.Y.MetersPerSecondSquared:N2}," +
        $"Z:{result.Z.MetersPerSecondSquared:N2} (m/s^2)]");

    sensor.StartUpdating(TimeSpan.FromMilliseconds(500));
}