Remarks

ADXL335
Status
Source code	GitHub
NuGet package

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

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

Purchasing

The ADXL335 sensor can be purchased on a breakout board from the following suppliers:

• Adafruit ADXL335
• Sparkfun ADXL335

Wiring Example

Characteristic	Locus
Inheritance	System.Object > Adxl335
Inherited Members	System.Object.ToString() System.Object.Equals(System.Object) System.Object.Equals(System.Object, System.Object) System.Object.ReferenceEquals(System.Object, System.Object) System.Object.GetHashCode() System.Object.GetType() System.Object.MemberwiseClone()
Namespace	Meadow.Foundation.Sensors.Motion
Assembly	Adxl335.dll

Syntax

public class Adxl335

Constructors

Adxl335(IIODevice, IPin, IPin, IPin, UInt16, Double)

Declaration

public Adxl335(IIODevice device, IPin x, IPin y, IPin z, ushort updateInterval = 100, double accelerationChangeNotificationThreshold = 0.10000000149011612)

Parameters

Type	Name	Description
IIODevice	device
IPin	x
IPin	y
IPin	z
System.UInt16	updateInterval
System.Double	accelerationChangeNotificationThreshold

Fields

MinimumPollingPeriod

Minimum value that can be used for the update interval when the sensor is being configured to generate interrupts.

Declaration

public const ushort MinimumPollingPeriod = 100

Field Value

Type	Description
System.UInt16

Properties

AccelerationChangeNotificationThreshold

Any changes in the acceleration that are greater than the acceleration threshold will cause an event to be raised when the instance is set to update automatically.

Declaration

public double AccelerationChangeNotificationThreshold { get; set; }

Property Value

Type	Description
System.Double

SupplyVoltage

Declaration

public double SupplyVoltage { get; set; }

Property Value

Type	Description
System.Double

X

Acceleration along the X-axis.

Declaration

public double X { get; }

Property Value

Type	Description
System.Double

Remarks

This property will only contain valid data after a call to Read or after an interrupt has been generated.

XVoltsPerG

Volts per G for the X axis.

Declaration

public double XVoltsPerG { get; set; }

Property Value

Type	Description
System.Double

Y

Acceleration along the Y-axis.

Declaration

public double Y { get; }

Property Value

Type	Description
System.Double

Remarks

This property will only contain valid data after a call to Read or after an interrupt has been generated.

YVoltsPerG

Volts per G for the X axis.

Declaration

public double YVoltsPerG { get; set; }

Property Value

Type	Description
System.Double

Z

Acceleration along the Z-axis.

Declaration

public double Z { get; }

Property Value

Type	Description
System.Double

Remarks

This property will only contain valid data after a call to Read or after an interrupt has been generated.

ZVoltsPerG

Volts per G for the X axis.

Declaration

public double ZVoltsPerG { get; set; }

Property Value

Type	Description
System.Double

Methods

GetRawSensorData()

Get the raw analog input values from the sensor.

Declaration

public Task<Vector> GetRawSensorData()

Returns

Type	Description
System.Threading.Tasks.Task<Vector>	Vector object containing the raw sensor data from the analog pins.

Update()

Read the sensor output and convert the sensor readings into acceleration values.

Declaration

public Task Update()

Returns

Type	Description
System.Threading.Tasks.Task

Events

AccelerationChanged

Event to be raised when the acceleration is greater than +/- AccelerationChangeNotificationThreshold.

Declaration

public event SensorVectorEventHandler AccelerationChanged

Event Type

Type	Description
SensorVectorEventHandler