Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

Characteristic	Locus
Inheritance	object ObservableBase<(Illuminance? AmbientLight, Color? Color, bool Valid)> SamplingSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)> PollingSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)> ByteCommsSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)> > Bh1745
Implements	IObservable<IChangeResult<(Illuminance? AmbientLight, Color? Color, bool Valid)>> ISamplingSensor<(Illuminance? AmbientLight, Color? Color, bool Valid)> ISensor<(Illuminance? AmbientLight, Color? Color, bool Valid)> IDisposable ILightSensor ISamplingSensor<Illuminance> ISensor<Illuminance> II2cPeripheral
Inherited Members	ByteCommsSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.Init(int, int) ByteCommsSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.Dispose(bool) ByteCommsSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.Dispose() ByteCommsSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.BusComms ByteCommsSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.ReadBuffer ByteCommsSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.WriteBuffer PollingSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.StartUpdating(TimeSpan?) PollingSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.StopUpdating() SamplingSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.samplingLock SamplingSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.ReadSensor() SamplingSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.RaiseEventsAndNotify(IChangeResult<(Illuminance? AmbientLight, Color? Color, bool Valid)>) SamplingSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.Read() SamplingSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.SamplingTokenSource SamplingSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.Conditions SamplingSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.IsSampling SamplingSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.UpdateInterval SamplingSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.Updated ObservableBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.NotifyObservers(IChangeResult<(Illuminance? AmbientLight, Color? Color, bool Valid)>) ObservableBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.Subscribe(IObserver<IChangeResult<(Illuminance? AmbientLight, Color? Color, bool Valid)>>) ObservableBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.CreateObserver(Action<IChangeResult<(Illuminance? AmbientLight, Color? Color, bool Valid)>>, Predicate<IChangeResult<(Illuminance? AmbientLight, Color? Color, bool Valid)>>) ObservableBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.observers object.Equals(object) object.Equals(object, object) object.GetHashCode() object.GetType() object.MemberwiseClone() object.ReferenceEquals(object, object) object.ToString()
Namespace	Meadow.Foundation.Sensors.Light
Assembly	Bh1745.dll

Syntax

public class Bh1745 : ByteCommsSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>, IObservable<IChangeResult<(Illuminance? AmbientLight, Color? Color, bool Valid)>>, ISamplingSensor<(Illuminance? AmbientLight, Color? Color, bool Valid)>, ISensor<(Illuminance? AmbientLight, Color? Color, bool Valid)>, IDisposable, ILightSensor, ISamplingSensor<Illuminance>, ISensor<Illuminance>, II2cPeripheral

Constructors

Bh1745(II2cBus, byte)

Create a new BH17545 color sensor object

Declaration

public Bh1745(II2cBus i2cBus, byte address = 56)

Parameters

Type	Name	Description
II2cBus	i2cBus
byte	address

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

Properties

AdcGain

Gets or sets the ADC gain of the sensor

Declaration

public Bh1745.AdcGainTypes AdcGain { get; set; }

Property Value

Type	Description
Bh1745.AdcGainTypes

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

CompensationMultipliers

Gets or sets the channel compensation multipliers which are used to scale the channel measurements

Declaration

public Bh1745.ChannelMultipliers CompensationMultipliers { get; set; }

Property Value

Type	Description
Bh1745.ChannelMultipliers

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

DefaultI2cAddress

The default I2C address for the peripheral

Declaration

public byte DefaultI2cAddress { get; }

Property Value

Type	Description
byte

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

Illuminance

The current Illuminance value

Declaration

public Illuminance? Illuminance { get; }

Property Value

Type	Description
Illuminance?

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

InterruptIsEnabled

Gets or sets whether the interrupt pin is enabled

Declaration

public bool InterruptIsEnabled { get; set; }

Property Value

Type	Description
bool

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

InterruptPersistence

Gets or sets the persistence function of the interrupt

Declaration

public Bh1745.InterruptTypes InterruptPersistence { get; set; }

Property Value

Type	Description
Bh1745.InterruptTypes

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

InterruptReset

Interrupt reset status

Declaration

public Bh1745.InterruptStatus InterruptReset { get; set; }

Property Value

Type	Description
Bh1745.InterruptStatus

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

InterruptSignalIsActive

Is the interrupt active

Declaration

public bool InterruptSignalIsActive { get; }

Property Value

Type	Description
bool

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

InterruptSource

Gets or sets the source channel that triggers the interrupt

Declaration

public Bh1745.InterruptChannels InterruptSource { get; set; }

Property Value

Type	Description
Bh1745.InterruptChannels

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

IsMeasurementActive

Is the sensor actively measuring

Declaration

public bool IsMeasurementActive { get; set; }

Property Value

Type	Description
bool

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

LatchBehavior

Gets or sets how the interrupt pin latches

Declaration

public Bh1745.LatchBehaviorTypes LatchBehavior { get; set; }

Property Value

Type	Description
Bh1745.LatchBehaviorTypes

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

LowerInterruptThreshold

Gets or sets the lower interrupt threshold

Declaration

public ushort LowerInterruptThreshold { get; set; }

Property Value

Type	Description
ushort

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

MeasurementTime

Gets or sets the currently set measurement time

Declaration

public Bh1745.MeasurementTimeType MeasurementTime { get; set; }

Property Value

Type	Description
Bh1745.MeasurementTimeType

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

UpperInterruptThreshold

Gets or sets the upper interrupt threshold

Declaration

public ushort UpperInterruptThreshold { get; set; }

Property Value

Type	Description
ushort

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

Methods

RaiseEventsAndNotify(IChangeResult<(Illuminance? AmbientLight, Color? Color, bool Valid)>)

Raise events for subcribers and notify of value changes

Declaration

protected override void RaiseEventsAndNotify(IChangeResult<(Illuminance? AmbientLight, Color? Color, bool Valid)> changeResult)

Parameters

Type	Name	Description
IChangeResult<(Illuminance? AmbientLight, Color? Color, bool Valid)>	changeResult	The updated sensor data

Overrides

SamplingSensorBase<(Illuminance? AmbientLight, Color? Color, bool Valid)>.RaiseEventsAndNotify(IChangeResult<(Illuminance? AmbientLight, Color? Color, bool Valid)>)

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

ReadBlueDataRegister()

Reads the blue data register of the sensor

Declaration

protected ushort ReadBlueDataRegister()

Returns

Type	Description
ushort

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

ReadClearDataRegister()

Reads the clear data register of the sensor

Declaration

protected ushort ReadClearDataRegister()

Returns

Type	Description
ushort

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

ReadGreenDataRegister()

Reads the green data register of the sensor

Declaration

protected ushort ReadGreenDataRegister()

Returns

Type	Description
ushort

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

ReadMeasurementIsValid()

Reads whether the last measurement is valid

Declaration

protected bool ReadMeasurementIsValid()

Returns

Type	Description
bool

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

ReadRedDataRegister()

Reads the red data register of the sensor

Declaration

protected ushort ReadRedDataRegister()

Returns

Type	Description
ushort

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

ReadSensor()

Reads data from the sensor

Declaration

protected override Task<(Illuminance? AmbientLight, Color? Color, bool Valid)> ReadSensor()

Returns

Type	Description
Task<(Illuminance? AmbientLight, Color? Color, bool Valid)>	The latest sensor reading

Overrides

Meadow.Foundation.SamplingSensorBase<(Meadow.Units.Illuminance? AmbientLight, Meadow.Foundation.Color? Color, bool Valid)>.ReadSensor()

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

Reset()

Resets the device to the default configuration On reset the sensor goes to power down mode

Declaration

protected void Reset()

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram:

Events

LuminosityUpdated

Raised when the luminosity changes

Declaration

public event EventHandler<IChangeResult<Illuminance>> LuminosityUpdated

Event Type

Type	Description
EventHandler<IChangeResult<Illuminance>>

Remarks

Bh1745
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

The BH1745 is a RGB color and luminance sensor that communicates over I2C.

Code Example

Bh1745 sensor;
RgbPwmLed rgbLed;

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

    sensor = new Bh1745(Device.CreateI2cBus());

    // instantiate our onboard LED that we'll show the color with
    rgbLed = new RgbPwmLed(
        Device.Pins.OnboardLedRed,
        Device.Pins.OnboardLedGreen,
        Device.Pins.OnboardLedBlue,
        commonType: CommonType.CommonAnode);

    // Example that uses an IObservable subscription to only be notified
    var consumer = Bh1745.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer: filter satisifed: {result.New.AmbientLight?.Lux:N2}Lux, old: {result.Old?.AmbientLight?.Lux:N2}Lux"),

        // only notify if the visible light changes by 100 lux (put your hand over the sensor to trigger)
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                // returns true if > 100lux change
                return ((result.New.AmbientLight.Value - old.AmbientLight.Value).Abs().Lux > 100);
            }
            return false;
        });

    sensor.Subscribe(consumer);

    //classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Ambient Light: {result.New.AmbientLight?.Lux:N2}Lux");
        Resolver.Log.Info($"  Color: {result.New.Color}");

        if (result.New.Color is { } color)
        {
            rgbLed.SetColor(color);
        }
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();

    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($" Visible Light: {result.AmbientLight?.Lux:N2}Lux");
    Resolver.Log.Info($" Color: {result.Color}");

    if (result.Color is { } color)
    {
        rgbLed.SetColor(color);
    }

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

Sample project(s) available on GitHub

Wiring Example

To wire a Bh1745 to your Meadow board, connect the following:

Bh1745	Meadow Pin
GND	GND
SCL	D08 (SCL)
SDA	D07 (SDA)
VCC	3V3

It should look like the following diagram: