Class SwitchingAnemometer

Driver for a "switching" anemometer (wind speed gauge) that has an internal switch that is triggered during every revolution.

Assembly: SwitchingAnemometer.dll

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Declaration

public class SwitchingAnemometer : PollingSensorBase<Speed>, IObservable<IChangeResult<Speed>>, IAnemometer, ISamplingSensor<Speed>, ISensor<Speed>, ISensor, ISamplingSensor, IDisposable

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

Implements:
System.IObservable<Meadow.IChangeResult<Meadow.Units.Speed>>, Meadow.Peripherals.Sensors.Weather.IAnemometer, Meadow.Peripherals.Sensors.ISamplingSensor<Meadow.Units.Speed>, Meadow.Peripherals.Sensors.ISensor<Meadow.Units.Speed>, Meadow.Peripherals.Sensors.ISensor, Meadow.Peripherals.Sensors.ISamplingSensor, System.IDisposable

Properties

WindSpeed

The current wind speed

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Declaration

public Speed? WindSpeed { get; }

NoWindTimeout

Time to wait if no events come in to register a zero speed wind

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Declaration

public TimeSpan NoWindTimeout { get; set; }

MaxSpeed

Define the theoretical maximum speed that can be measured. Higher speeds are ignored.

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Declaration

public Speed? MaxSpeed { get; set; }

OneTimeReadDuration

Time to capture samples for a one time Read if IsSampling is false

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Declaration

public TimeSpan OneTimeReadDuration { get; set; }

SampleCount

Number of samples to take for a reading

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Declaration

public int SampleCount { get; set; }

KmhPerSwitchPerSecond

Calibration for how fast the wind speed is when the switch is hit once per second. Used to calculate the wind speed based on the time duration between switch events. Default is 2.4kmh.

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Declaration

public double KmhPerSwitchPerSecond { get; set; }

IsDisposed

Is the object disposed

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Declaration

public bool IsDisposed { get; }

Methods

StartUpdating(TimeSpan?)

Starts continuously sampling the sensor

This method also starts raising Updated events and IObservable subscribers getting notified. Use the standbyDuration parameter to specify how often events and notifications are raised/sent.

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Declaration

public override void StartUpdating(TimeSpan? updateInterval = null)

Parameters

Type	Name
System.Nullable<System.TimeSpan>	updateInterval

StopUpdating()

Stops the driver from raising wind speed events

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Declaration

public override void StopUpdating()

ReadSensor()

Reads data from the sensor

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Declaration

protected override Task<Speed> ReadSensor()

Returns

System.Threading.Tasks.Task<Meadow.Units.Speed>: The latest sensor reading### SwitchIntervalToKmh(TimeSpan) A wind speed of 2.4km/h causes the switch to close once per second

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Declaration

protected double SwitchIntervalToKmh(TimeSpan interval)

Returns

System.Double

Parameters

Type	Name	Description
System.TimeSpan	interval	The interval between signals

Dispose()

Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

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Declaration

public void Dispose()

Dispose(bool)

Dispose of the object

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Declaration

protected virtual void Dispose(bool disposing)

Parameters

Type	Name	Description
System.Boolean	disposing	Is disposing

Implements

• System.IObservable<Meadow.IChangeResult<Meadow.Units.Speed>>
• Meadow.Peripherals.Sensors.Weather.IAnemometer
• Meadow.Peripherals.Sensors.ISamplingSensor<Meadow.Units.Speed>
• Meadow.Peripherals.Sensors.ISensor<Meadow.Units.Speed>
• Meadow.Peripherals.Sensors.ISensor
• Meadow.Peripherals.Sensors.ISamplingSensor
• System.IDisposable