Remarks

Adxl337
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

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)
            { //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));
}

Sample project(s) available on GitHub

Wiring Example

Characteristic	Locus
Inheritance	object ObservableBase<Acceleration3D> SamplingSensorBase<Acceleration3D> PollingSensorBase<Acceleration3D> Adxl3xxBase > Adxl337
Implements	IObservable<IChangeResult<Acceleration3D>> IAccelerometer ISamplingSensor<Acceleration3D> ISensor<Acceleration3D>
Inherited Members	Adxl3xxBase.Acceleration3DUpdated Adxl3xxBase.XAnalogIn Adxl3xxBase.YAnalogIn Adxl3xxBase.ZAnalogIn Adxl3xxBase.SupplyVoltage Adxl3xxBase.GravityRange Adxl3xxBase.Acceleration3D Adxl3xxBase.RaiseEventsAndNotify(IChangeResult<Acceleration3D>) Adxl3xxBase.ReadSensor() Adxl3xxBase.VoltageToGravity(Voltage) PollingSensorBase<Acceleration3D>.StartUpdating(TimeSpan?) PollingSensorBase<Acceleration3D>.StopUpdating() SamplingSensorBase<Acceleration3D>.samplingLock SamplingSensorBase<Acceleration3D>.Read() SamplingSensorBase<Acceleration3D>.SamplingTokenSource SamplingSensorBase<Acceleration3D>.Conditions SamplingSensorBase<Acceleration3D>.IsSampling SamplingSensorBase<Acceleration3D>.UpdateInterval SamplingSensorBase<Acceleration3D>.Updated ObservableBase<Acceleration3D>.NotifyObservers(IChangeResult<Acceleration3D>) ObservableBase<Acceleration3D>.Subscribe(IObserver<IChangeResult<Acceleration3D>>) ObservableBase<Acceleration3D>.CreateObserver(Action<IChangeResult<Acceleration3D>>, Predicate<IChangeResult<Acceleration3D>>) ObservableBase<Acceleration3D>.observers object.Equals(object) object.Equals(object, object) object.GetHashCode() object.GetType() object.MemberwiseClone() object.ReferenceEquals(object, object) object.ToString()
Namespace	Meadow.Foundation.Sensors.Motion
Assembly	Adxl3xx.dll

Syntax

public class Adxl337 : Adxl3xxBase, IObservable<IChangeResult<Acceleration3D>>, IAccelerometer, ISamplingSensor<Acceleration3D>, ISensor<Acceleration3D>

Constructors

Adxl337(IPin, IPin, IPin, Voltage?)

Create a new ADXL335 sensor object

Declaration

public Adxl337(IPin xPin, IPin yPin, IPin zPin, Voltage? supplyVoltage)

Parameters

Type	Name	Description
IPin	xPin	Analog pin connected to the X axis output from the ADXL335 sensor
IPin	yPin	Analog pin connected to the Y axis output from the ADXL335 sensor
IPin	zPin	Analog pin connected to the Z axis output from the ADXL335 sensor
Voltage?	supplyVoltage	The voltage supplied to the sensor. Defaults to 3.3V if null

Remarks

Adxl337
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

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)
            { //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));
}

Sample project(s) available on GitHub

Wiring Example