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Meadow.Foundation.Sensors.Motion.Adxl337

Adxl337
StatusStatus badge: working
Source codeGitHub
Datasheet(s)GitHub
NuGet packageNuGet Gallery for Meadow.Foundation.Sensors.Motion.Adxl3xx

The ADXL337 is a low power accelerometer capable of measuring +/- 3g of acceleration along three axes. The ADXL337 is controlled via I2C.

Code Example

Adxl337 sensor;

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

// create the sensor driver
sensor = new Adxl337(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 = Adxl337.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)
{
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));
}

Sample project(s) available on GitHub

Wiring Example

Class Adxl337

Driver for the ADXL337 triple axis accelerometer +/- 3g

Assembly: Adxl3xx.dll
View Source
Declaration
public class Adxl337 : Adxl3xxBase, IObservable<IChangeResult<Acceleration3D>>, IAccelerometer, ISamplingSensor<Acceleration3D>, ISensor<Acceleration3D>, ISensor, ISamplingSensor, IDisposable

Inheritance: System.Object -> Meadow.Foundation.ObservableBase<UNIT>

Implements:
System.IObservable<Meadow.IChangeResult<Meadow.Units.Acceleration3D>>, Meadow.Peripherals.Sensors.Motion.IAccelerometer, Meadow.Peripherals.Sensors.ISamplingSensor<Meadow.Units.Acceleration3D>, Meadow.Peripherals.Sensors.ISensor<Meadow.Units.Acceleration3D>, Meadow.Peripherals.Sensors.ISensor, Meadow.Peripherals.Sensors.ISamplingSensor, System.IDisposable

Implements

  • System.IObservable<Meadow.IChangeResult<Meadow.Units.Acceleration3D>>
  • Meadow.Peripherals.Sensors.Motion.IAccelerometer
  • Meadow.Peripherals.Sensors.ISamplingSensor<Meadow.Units.Acceleration3D>
  • Meadow.Peripherals.Sensors.ISensor<Meadow.Units.Acceleration3D>
  • Meadow.Peripherals.Sensors.ISensor
  • Meadow.Peripherals.Sensors.ISamplingSensor
  • System.IDisposable