Meadow.Foundation.Sensors.Environmental.AtlasScientificGravityDOMeter

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

Code Example

AtlasScientificGravityDOMeter sensor;

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

    sensor = new AtlasScientificGravityDOMeter(Device.Pins.A01);
    sensor.CalibrationInAir = new Voltage(0.04, Voltage.UnitType.Volts);

    // Example that uses an IObservable subscription to only be notified when the saturation changes
    var consumer = AtlasScientificGravityDOMeter.CreateObserver(
        handler: result =>
        {
            string oldValue = (result.Old is { } old) ? $"{old * 100:n1}" : "n/a";
            string newValue = $"{result.New * 100:n1}";
            Resolver.Log.Info($"New: {newValue}%, Old: {oldValue}%");
        },
        filter: null
    );
    sensor.Subscribe(consumer);

    // optional classical .NET events can also be used:
    sensor.Updated += (sender, result) =>
    {
        string oldValue = (result.Old is { } old) ? $"{old * 100:n0}%" : "n/a";
        Resolver.Log.Info($"Updated - New: {result.New * 100:n0}%, Old: {oldValue}");
    };

    return Task.CompletedTask;
}

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

    await ReadSensor();

    //example calibration setting, ensure the sensor is set up for calibration 
    var calibrationVoltage = await sensor.GetCurrentVoltage();
    sensor.CalibrationInAir = calibrationVoltage;

    Resolver.Log.Info($"Calibration voltage: {calibrationVoltage.Volts}V");

    sensor.StartUpdating(TimeSpan.FromSeconds(2));
}

protected async Task ReadSensor()
{
    var saturation = await sensor.Read();
    Resolver.Log.Info($"Initial saturation: {saturation * 100:N1}%");
}

Sample project(s) available on GitHub

Class AtlasScientificGravityDOMeter

Atlas Scientific Analog Gravity Dissolved Oxygen Meter

Assembly: AtlasScientificGravityDOMeter.dll

View Source

Declaration

public class AtlasScientificGravityDOMeter : SamplingSensorBase<double>, IObservable<IChangeResult<double>>, IDissolvedOxygenSaturationSensor, ISamplingSensor<double>, ISensor<double>, ISensor, ISamplingSensor

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

Implements:
System.IObservable<Meadow.IChangeResult<System.Double>>, Meadow.Peripherals.Sensors.Environmental.IDissolvedOxygenSaturationSensor, Meadow.Peripherals.Sensors.ISamplingSensor<System.Double>, Meadow.Peripherals.Sensors.ISensor<System.Double>, Meadow.Peripherals.Sensors.ISensor, Meadow.Peripherals.Sensors.ISamplingSensor

Properties

CalibrationInAir

The calibration value for the sensor in air

View Source

Declaration

public Voltage CalibrationInAir { get; set; }

AnalogInputPort

Returns the analog input port

View Source

Declaration

protected IAnalogInputPort AnalogInputPort { get; }

Saturation

Last saturation value read from the sensor (0.0-1.0)

View Source

Declaration

public double? Saturation { get; protected set; }

Methods

GetCurrentVoltage()

Get the current voltage, useful for calibration

View Source

Declaration

public Task<Voltage> GetCurrentVoltage()

Returns

System.Threading.Tasks.Task<Meadow.Units.Voltage>

ReadSensor()

Reads data from the sensor

View Source

Declaration

protected override Task<double> ReadSensor()

Returns

System.Threading.Tasks.Task<System.Double>: The latest sensor reading### StartUpdating(TimeSpan?) Starts continuously sampling the sensor

View Source

Declaration

public override void StartUpdating(TimeSpan? updateInterval)

Parameters

Type	Name
System.Nullable<System.TimeSpan>	updateInterval

StopUpdating()

Stops sampling the sensor

View Source

Declaration

public override void StopUpdating()

Implements

• System.IObservable<Meadow.IChangeResult<System.Double>>
• Meadow.Peripherals.Sensors.Environmental.IDissolvedOxygenSaturationSensor
• Meadow.Peripherals.Sensors.ISamplingSensor<System.Double>
• Meadow.Peripherals.Sensors.ISensor<System.Double>
• Meadow.Peripherals.Sensors.ISensor
• Meadow.Peripherals.Sensors.ISamplingSensor