Class Sgp40

Provides access to the Sensirion SGP40 VOC sensor

Assembly: Sgp40.dll

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Declaration

public class Sgp40 : ByteCommsSensorBase<int>, IObservable<IChangeResult<int>>, ISamplingSensor<int>, ISensor<int>, ISensor, ISamplingSensor, IDisposable, II2cPeripheral

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

Implements:
System.IObservable<Meadow.IChangeResult<System.Int32>>, Meadow.Peripherals.Sensors.ISamplingSensor<System.Int32>, Meadow.Peripherals.Sensors.ISensor<System.Int32>, Meadow.Peripherals.Sensors.ISensor, Meadow.Peripherals.Sensors.ISamplingSensor, System.IDisposable, Meadow.Hardware.II2cPeripheral

Properties

VocIndex

The VOC Index, from the last reading

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Declaration

public int VocIndex { get; }

SerialNumber

Serial number of the device

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Declaration

public ulong SerialNumber { get; }

DefaultI2cAddress

The default I2C address for the peripheral

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Declaration

public byte DefaultI2cAddress { get; }

Methods

Initialize()

Initialize the sensor

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Declaration

protected void Initialize()

RunSelfTest()

This command triggers the built-in self-test checking for integrity of both hotplate and MOX material

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Declaration

public bool RunSelfTest()

Returns

System.Boolean: true on successful test, otherwise false### ReadSensor() Reads data from the sensor

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Declaration

protected override Task<int> ReadSensor()

Returns

System.Threading.Tasks.Task<System.Int32>: The latest sensor reading### TurnHeaterOff() This command turns the hotplate off and stops the measurement. Subsequently, the sensor enters idle mode.

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Declaration

public void TurnHeaterOff()

SetCompensationData(RelativeHumidity, Temperature)

Set the compensation data

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Declaration

public void SetCompensationData(RelativeHumidity humidity, Temperature temperature)

Parameters

Type	Name	Description
Meadow.Units.RelativeHumidity	humidity	Humidity compensation
Meadow.Units.Temperature	temperature	Temperature compensation

ClearCompensationData()

Clear the compensation data

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Declaration

public void ClearCompensationData()

Implements

• System.IObservable<Meadow.IChangeResult<System.Int32>>
• Meadow.Peripherals.Sensors.ISamplingSensor<System.Int32>
• Meadow.Peripherals.Sensors.ISensor<System.Int32>
• Meadow.Peripherals.Sensors.ISensor
• Meadow.Peripherals.Sensors.ISamplingSensor
• System.IDisposable
• Meadow.Hardware.II2cPeripheral