Remarks

Mcp9808
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Mcp9808 mcp9808;

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

    mcp9808 = new Mcp9808(Device.CreateI2cBus());

    var consumer = Mcp9808.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Temperature New Value { result.New.Celsius}C");
            Resolver.Log.Info($"Temperature Old Value { result.Old?.Celsius}C");
        },
        filter: null
    );
    mcp9808.Subscribe(consumer);

    mcp9808.TemperatureUpdated += (object sender, IChangeResult<Meadow.Units.Temperature> e) =>
    {
        Resolver.Log.Info($"Temperature Updated: {e.New.Celsius:N2}C");
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var temp = await mcp9808.Read();

    Resolver.Log.Info($"Temperature New Value {temp.Celsius}C");

    mcp9808.StartUpdating(TimeSpan.FromSeconds(1));
}

Sample project(s) available on GitHub

Characteristic	Locus
Inheritance	System.Object ObservableBase<Units.Temperature> SamplingSensorBase<Units.Temperature> PollingSensorBase<Units.Temperature> ByteCommsSensorBase<Units.Temperature> > Mcp9808
Implements	ISamplingSensor<Units.Temperature> ISamplingSensor<Units.Temperature> IDisposable ITemperatureSensor
Inherited Members	ByteCommsSensorBase<Units.Temperature>.Peripheral ByteCommsSensorBase<Units.Temperature>.ReadBuffer ByteCommsSensorBase<Units.Temperature>.WriteBuffer ByteCommsSensorBase<Units.Temperature>.Init(Int32, Int32) ByteCommsSensorBase<Units.Temperature>.Dispose(Boolean) ByteCommsSensorBase<Units.Temperature>.Dispose() PollingSensorBase<Units.Temperature>.StartUpdating(Nullable<TimeSpan>) PollingSensorBase<Units.Temperature>.StopUpdating() SamplingSensorBase<Units.Temperature>.samplingLock SamplingSensorBase<Units.Temperature>.Updated SamplingSensorBase<Units.Temperature>.SamplingTokenSource SamplingSensorBase<Units.Temperature>.Conditions SamplingSensorBase<Units.Temperature>.IsSampling SamplingSensorBase<Units.Temperature>.UpdateInterval SamplingSensorBase<Units.Temperature>.RaiseEventsAndNotify(IChangeResult<>) SamplingSensorBase<Units.Temperature>.Read() ObservableBase<Units.Temperature>.observers ObservableBase<Units.Temperature>.NotifyObservers(IChangeResult<>) Meadow.Foundation.ObservableBase<Units.Temperature>.Subscribe(IObserver<>) Meadow.Foundation.ObservableBase<Units.Temperature>.CreateObserver(Action<>, System.Nullable<Predicate<IChangeResult<UNIT>>>)
Namespace	Meadow.Foundation.Sensors.Temperature
Assembly	Mcp9808.dll

Syntax

public class Mcp9808 : ByteCommsSensorBase<Units.Temperature>, ISamplingSensor<Units.Temperature>, ISamplingSensor<Units.Temperature>, IDisposable, ITemperatureSensor

Constructors

Mcp9808(II2cBus, Byte)

Creates a new Mcp9808 object

Declaration

public Mcp9808(II2cBus i2CBus, byte address = null)

Parameters

Type	Name	Description
II2cBus	i2CBus	The I2C bus
System.Byte	address	The I2C address

Properties

Temperature

The temperature, in degrees celsius (°C), from the last reading.

Declaration

public Units.Temperature? Temperature { get; protected set; }

Property Value

Type	Description
System.Nullable<Units.Temperature>

Methods

GetDeviceId()

Read the device ID

Declaration

public ushort GetDeviceId()

Returns

Type	Description
System.UInt16

GetManufactureId()

Read the manufacture ID

Declaration

public ushort GetManufactureId()

Returns

Type	Description
System.UInt16

GetResolution()

Read resolution

Declaration

public byte GetResolution()

Returns

Type	Description
System.Byte

RaiseEventsAndNotify(IChangeResult<Units.Temperature>)

Raise events for subcribers and notify of value changes

Declaration

protected override void RaiseEventsAndNotify(IChangeResult<Units.Temperature> changeResult)

Parameters

Type	Name	Description
IChangeResult<Units.Temperature>	changeResult	The updated sensor data

ReadSensor()

Reads data from the sensor

Declaration

protected override Task<Units.Temperature> ReadSensor()

Returns

Type	Description
Task<Units.Temperature>	The latest sensor reading

Overrides

Meadow.Foundation.SamplingSensorBase<Units.Temperature>.ReadSensor()

SetResolution(Byte)

Set resolution

Declaration

public void SetResolution(byte resolution)

Parameters

Type	Name	Description
System.Byte	resolution

Sleep()

Set the device into a low power sleep state

Declaration

public void Sleep()

Wake()

Wake the the device if it's in sleep state

Declaration

public void Wake()

Events

TemperatureUpdated

Raised when the temeperature value changes

Declaration

public event EventHandler<IChangeResult<Units.Temperature>> TemperatureUpdated

Event Type

Type	Description
EventHandler<IChangeResult<Units.Temperature>>