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Meadow.Foundation.Sensors.Motion.Adxl335

Adxl335
StatusStatus badge: working
Source codeGitHub
Datasheet(s)GitHub
NuGet packageNuGet Gallery for Meadow.Foundation.Sensors.Motion.Adxl3xx

The ADXL335 is a low power accelerometer capable of measuring +/- 3g of acceleration along three axes. The ADXL335 is controlled via I2C.

Code Example

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)
{
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

Code Sample

public class MeadowApp : App<F7Micro, MeadowApp>
{
Adxl335 sensor;

public MeadowApp()
{
sensor = new Adxl335(Device, Device.Pins.A01, Device.Pins.A02, Device.Pins.A03, 500);

sensor.AccelerationChanged += Sensor_AccelerationChanged;
}

private void Sensor_AccelerationChanged(object sender, Meadow.Foundation.Sensors.SensorVectorEventArgs e)
{
Console.WriteLine($"X: {e.CurrentValue.X}, Y: {e.CurrentValue.Y}, Z: {e.CurrentValue.Z}");
}
}

Sample projects available on GitHub

Wiring Example