Remarks

Thermistor
Status
Source code	GitHub
NuGet package

Code Example

private SteinhartHartCalculatedThermistor thermistor;

public override Task Initialize()
{
    Resolver.Log.Info("Initialize...");

    thermistor = new SteinhartHartCalculatedThermistor(Device.CreateAnalogInputPort(Device.Pins.A00), new Resistance(10, Meadow.Units.Resistance.UnitType.Kiloohms));

    var consumer = SteinhartHartCalculatedThermistor.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Temperature New Value {result.New.Fahrenheit:N1}F/{result.New.Celsius:N1}C");
            Resolver.Log.Info($"Temperature Old Value {result.Old?.Fahrenheit:N1}F/{result.Old?.Celsius:N1}C");
        },
        filter: null
    );
    thermistor.Subscribe(consumer);

    thermistor.TemperatureUpdated += (object sender, IChangeResult<Meadow.Units.Temperature> e) =>
    {
        Resolver.Log.Info($"Temperature Updated: {e.New.Fahrenheit:N1}F/{e.New.Celsius:N1}C");
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var temp = await thermistor.Read();
    Resolver.Log.Info($"Current temperature: {temp.Fahrenheit:N1}F/{temp.Celsius:N1}C");

    thermistor.StartUpdating(TimeSpan.FromSeconds(1));
}

Sample project(s) available on GitHub

Characteristic	Locus
Inheritance	object ObservableBase<Temperature> SamplingSensorBase<Temperature> > Thermistor > SteinhartHartCalculatedThermistor
Implements	IObservable<IChangeResult<Temperature>> ITemperatureSensor ISamplingSensor<Temperature> ISensor<Temperature>
Inherited Members	SamplingSensorBase<Temperature>.samplingLock SamplingSensorBase<Temperature>.Updated SamplingSensorBase<Temperature>.SamplingTokenSource SamplingSensorBase<Temperature>.Conditions SamplingSensorBase<Temperature>.IsSampling SamplingSensorBase<Temperature>.UpdateInterval SamplingSensorBase<Temperature>.ReadSensor() SamplingSensorBase<Temperature>.RaiseEventsAndNotify(IChangeResult<Temperature>) SamplingSensorBase<Temperature>.Read() ObservableBase<Temperature>.observers ObservableBase<Temperature>.NotifyObservers(IChangeResult<Temperature>) ObservableBase<Temperature>.Subscribe(IObserver<IChangeResult<Temperature>>) ObservableBase<Temperature>.CreateObserver(Action<IChangeResult<Temperature>>, Predicate<IChangeResult<Temperature>>) object.Equals(object) object.Equals(object, object) object.GetHashCode() object.GetType() object.MemberwiseClone() object.ReferenceEquals(object, object) object.ToString()
Namespace	Meadow.Foundation.Sensors.Temperature
Assembly	Thermistor.dll

Syntax

public abstract class Thermistor : SamplingSensorBase<Temperature>, IObservable<IChangeResult<Temperature>>, ITemperatureSensor, ISamplingSensor<Temperature>, ISensor<Temperature>

Constructors

Thermistor(IAnalogInputPort)

Creates a new Thermistor object using the provided analog input

Declaration

protected Thermistor(IAnalogInputPort analogInput)

Parameters

Type	Name	Description
IAnalogInputPort	analogInput	The analog input reading the thermistor voltage divider output

Remarks

Thermistor
Status
Source code	GitHub
NuGet package

Code Example

private SteinhartHartCalculatedThermistor thermistor;

public override Task Initialize()
{
    Resolver.Log.Info("Initialize...");

    thermistor = new SteinhartHartCalculatedThermistor(Device.CreateAnalogInputPort(Device.Pins.A00), new Resistance(10, Meadow.Units.Resistance.UnitType.Kiloohms));

    var consumer = SteinhartHartCalculatedThermistor.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Temperature New Value {result.New.Fahrenheit:N1}F/{result.New.Celsius:N1}C");
            Resolver.Log.Info($"Temperature Old Value {result.Old?.Fahrenheit:N1}F/{result.Old?.Celsius:N1}C");
        },
        filter: null
    );
    thermistor.Subscribe(consumer);

    thermistor.TemperatureUpdated += (object sender, IChangeResult<Meadow.Units.Temperature> e) =>
    {
        Resolver.Log.Info($"Temperature Updated: {e.New.Fahrenheit:N1}F/{e.New.Celsius:N1}C");
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var temp = await thermistor.Read();
    Resolver.Log.Info($"Current temperature: {temp.Fahrenheit:N1}F/{temp.Celsius:N1}C");

    thermistor.StartUpdating(TimeSpan.FromSeconds(1));
}

Sample project(s) available on GitHub

Properties

AnalogInputPort

The analog input port used to determine output voltage of the voltage divider circuit

Declaration

protected IAnalogInputPort AnalogInputPort { get; }

Property Value

Type	Description
IAnalogInputPort

Remarks

Thermistor
Status
Source code	GitHub
NuGet package

Code Example

private SteinhartHartCalculatedThermistor thermistor;

public override Task Initialize()
{
    Resolver.Log.Info("Initialize...");

    thermistor = new SteinhartHartCalculatedThermistor(Device.CreateAnalogInputPort(Device.Pins.A00), new Resistance(10, Meadow.Units.Resistance.UnitType.Kiloohms));

    var consumer = SteinhartHartCalculatedThermistor.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Temperature New Value {result.New.Fahrenheit:N1}F/{result.New.Celsius:N1}C");
            Resolver.Log.Info($"Temperature Old Value {result.Old?.Fahrenheit:N1}F/{result.Old?.Celsius:N1}C");
        },
        filter: null
    );
    thermistor.Subscribe(consumer);

    thermistor.TemperatureUpdated += (object sender, IChangeResult<Meadow.Units.Temperature> e) =>
    {
        Resolver.Log.Info($"Temperature Updated: {e.New.Fahrenheit:N1}F/{e.New.Celsius:N1}C");
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var temp = await thermistor.Read();
    Resolver.Log.Info($"Current temperature: {temp.Fahrenheit:N1}F/{temp.Celsius:N1}C");

    thermistor.StartUpdating(TimeSpan.FromSeconds(1));
}

Sample project(s) available on GitHub

NominalResistance

The nominal resistance of the thermistor (e.g. 10kOhm for a 10k thermistor)

Declaration

public abstract Resistance NominalResistance { get; }

Property Value

Type	Description
Resistance

Remarks

Thermistor
Status
Source code	GitHub
NuGet package

Code Example

private SteinhartHartCalculatedThermistor thermistor;

public override Task Initialize()
{
    Resolver.Log.Info("Initialize...");

    thermistor = new SteinhartHartCalculatedThermistor(Device.CreateAnalogInputPort(Device.Pins.A00), new Resistance(10, Meadow.Units.Resistance.UnitType.Kiloohms));

    var consumer = SteinhartHartCalculatedThermistor.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Temperature New Value {result.New.Fahrenheit:N1}F/{result.New.Celsius:N1}C");
            Resolver.Log.Info($"Temperature Old Value {result.Old?.Fahrenheit:N1}F/{result.Old?.Celsius:N1}C");
        },
        filter: null
    );
    thermistor.Subscribe(consumer);

    thermistor.TemperatureUpdated += (object sender, IChangeResult<Meadow.Units.Temperature> e) =>
    {
        Resolver.Log.Info($"Temperature Updated: {e.New.Fahrenheit:N1}F/{e.New.Celsius:N1}C");
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var temp = await thermistor.Read();
    Resolver.Log.Info($"Current temperature: {temp.Fahrenheit:N1}F/{temp.Celsius:N1}C");

    thermistor.StartUpdating(TimeSpan.FromSeconds(1));
}

Sample project(s) available on GitHub

NominalTemperature

The nominal temperature for the nominal resistance, typically 25C

Declaration

public virtual Temperature NominalTemperature { get; }

Property Value

Type	Description
Temperature

Remarks

Thermistor
Status
Source code	GitHub
NuGet package

Code Example

private SteinhartHartCalculatedThermistor thermistor;

public override Task Initialize()
{
    Resolver.Log.Info("Initialize...");

    thermistor = new SteinhartHartCalculatedThermistor(Device.CreateAnalogInputPort(Device.Pins.A00), new Resistance(10, Meadow.Units.Resistance.UnitType.Kiloohms));

    var consumer = SteinhartHartCalculatedThermistor.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Temperature New Value {result.New.Fahrenheit:N1}F/{result.New.Celsius:N1}C");
            Resolver.Log.Info($"Temperature Old Value {result.Old?.Fahrenheit:N1}F/{result.Old?.Celsius:N1}C");
        },
        filter: null
    );
    thermistor.Subscribe(consumer);

    thermistor.TemperatureUpdated += (object sender, IChangeResult<Meadow.Units.Temperature> e) =>
    {
        Resolver.Log.Info($"Temperature Updated: {e.New.Fahrenheit:N1}F/{e.New.Celsius:N1}C");
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var temp = await thermistor.Read();
    Resolver.Log.Info($"Current temperature: {temp.Fahrenheit:N1}F/{temp.Celsius:N1}C");

    thermistor.StartUpdating(TimeSpan.FromSeconds(1));
}

Sample project(s) available on GitHub

Temperature

The temperature from the last reading

Declaration

public Temperature? Temperature { get; protected set; }

Property Value

Type	Description
Temperature?

Remarks

Thermistor
Status
Source code	GitHub
NuGet package

Code Example

private SteinhartHartCalculatedThermistor thermistor;

public override Task Initialize()
{
    Resolver.Log.Info("Initialize...");

    thermistor = new SteinhartHartCalculatedThermistor(Device.CreateAnalogInputPort(Device.Pins.A00), new Resistance(10, Meadow.Units.Resistance.UnitType.Kiloohms));

    var consumer = SteinhartHartCalculatedThermistor.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Temperature New Value {result.New.Fahrenheit:N1}F/{result.New.Celsius:N1}C");
            Resolver.Log.Info($"Temperature Old Value {result.Old?.Fahrenheit:N1}F/{result.Old?.Celsius:N1}C");
        },
        filter: null
    );
    thermistor.Subscribe(consumer);

    thermistor.TemperatureUpdated += (object sender, IChangeResult<Meadow.Units.Temperature> e) =>
    {
        Resolver.Log.Info($"Temperature Updated: {e.New.Fahrenheit:N1}F/{e.New.Celsius:N1}C");
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var temp = await thermistor.Read();
    Resolver.Log.Info($"Current temperature: {temp.Fahrenheit:N1}F/{temp.Celsius:N1}C");

    thermistor.StartUpdating(TimeSpan.FromSeconds(1));
}

Sample project(s) available on GitHub

Methods

StartUpdating(TimeSpan?)

Starts updating the sensor on the updateInterval frequency specified

Declaration

public override void StartUpdating(TimeSpan? updateInterval = null)

Parameters

Type	Name	Description
TimeSpan?	updateInterval	A TimeSpan that specifies how long to wait between readings

Overrides

SamplingSensorBase<Temperature>.StartUpdating(TimeSpan?)

Remarks

Thermistor
Status
Source code	GitHub
NuGet package

Code Example

private SteinhartHartCalculatedThermistor thermistor;

public override Task Initialize()
{
    Resolver.Log.Info("Initialize...");

    thermistor = new SteinhartHartCalculatedThermistor(Device.CreateAnalogInputPort(Device.Pins.A00), new Resistance(10, Meadow.Units.Resistance.UnitType.Kiloohms));

    var consumer = SteinhartHartCalculatedThermistor.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Temperature New Value {result.New.Fahrenheit:N1}F/{result.New.Celsius:N1}C");
            Resolver.Log.Info($"Temperature Old Value {result.Old?.Fahrenheit:N1}F/{result.Old?.Celsius:N1}C");
        },
        filter: null
    );
    thermistor.Subscribe(consumer);

    thermistor.TemperatureUpdated += (object sender, IChangeResult<Meadow.Units.Temperature> e) =>
    {
        Resolver.Log.Info($"Temperature Updated: {e.New.Fahrenheit:N1}F/{e.New.Celsius:N1}C");
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var temp = await thermistor.Read();
    Resolver.Log.Info($"Current temperature: {temp.Fahrenheit:N1}F/{temp.Celsius:N1}C");

    thermistor.StartUpdating(TimeSpan.FromSeconds(1));
}

Sample project(s) available on GitHub

StopUpdating()

Stops sampling the sensor

Declaration

public override void StopUpdating()

Overrides

SamplingSensorBase<Temperature>.StopUpdating()

Remarks

Thermistor
Status
Source code	GitHub
NuGet package

Code Example

private SteinhartHartCalculatedThermistor thermistor;

public override Task Initialize()
{
    Resolver.Log.Info("Initialize...");

    thermistor = new SteinhartHartCalculatedThermistor(Device.CreateAnalogInputPort(Device.Pins.A00), new Resistance(10, Meadow.Units.Resistance.UnitType.Kiloohms));

    var consumer = SteinhartHartCalculatedThermistor.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Temperature New Value {result.New.Fahrenheit:N1}F/{result.New.Celsius:N1}C");
            Resolver.Log.Info($"Temperature Old Value {result.Old?.Fahrenheit:N1}F/{result.Old?.Celsius:N1}C");
        },
        filter: null
    );
    thermistor.Subscribe(consumer);

    thermistor.TemperatureUpdated += (object sender, IChangeResult<Meadow.Units.Temperature> e) =>
    {
        Resolver.Log.Info($"Temperature Updated: {e.New.Fahrenheit:N1}F/{e.New.Celsius:N1}C");
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var temp = await thermistor.Read();
    Resolver.Log.Info($"Current temperature: {temp.Fahrenheit:N1}F/{temp.Celsius:N1}C");

    thermistor.StartUpdating(TimeSpan.FromSeconds(1));
}

Sample project(s) available on GitHub

Events

TemperatureUpdated

Raised when the temperature is updated

Declaration

public event EventHandler<IChangeResult<Temperature>> TemperatureUpdated

Event Type

Type	Description
EventHandler<IChangeResult<Temperature>>

Remarks

Thermistor
Status
Source code	GitHub
NuGet package

Code Example

private SteinhartHartCalculatedThermistor thermistor;

public override Task Initialize()
{
    Resolver.Log.Info("Initialize...");

    thermistor = new SteinhartHartCalculatedThermistor(Device.CreateAnalogInputPort(Device.Pins.A00), new Resistance(10, Meadow.Units.Resistance.UnitType.Kiloohms));

    var consumer = SteinhartHartCalculatedThermistor.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Temperature New Value {result.New.Fahrenheit:N1}F/{result.New.Celsius:N1}C");
            Resolver.Log.Info($"Temperature Old Value {result.Old?.Fahrenheit:N1}F/{result.Old?.Celsius:N1}C");
        },
        filter: null
    );
    thermistor.Subscribe(consumer);

    thermistor.TemperatureUpdated += (object sender, IChangeResult<Meadow.Units.Temperature> e) =>
    {
        Resolver.Log.Info($"Temperature Updated: {e.New.Fahrenheit:N1}F/{e.New.Celsius:N1}C");
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var temp = await thermistor.Read();
    Resolver.Log.Info($"Current temperature: {temp.Fahrenheit:N1}F/{temp.Celsius:N1}C");

    thermistor.StartUpdating(TimeSpan.FromSeconds(1));
}

Sample project(s) available on GitHub