This is a prerelease version of Meadow.Foundation.Sensors.Environmental.DFRobotGravityDOMeter.
There is a newer version of this package available.
See the version list below for details.
dotnet add package Meadow.Foundation.Sensors.Environmental.DFRobotGravityDOMeter --version
NuGet\Install-Package Meadow.Foundation.Sensors.Environmental.DFRobotGravityDOMeter -Version
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="Meadow.Foundation.Sensors.Environmental.DFRobotGravityDOMeter" Version="" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Meadow.Foundation.Sensors.Environmental.DFRobotGravityDOMeter --version
#r "nuget: Meadow.Foundation.Sensors.Environmental.DFRobotGravityDOMeter,"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install Meadow.Foundation.Sensors.Environmental.DFRobotGravityDOMeter as a Cake Addin
#addin nuget:?package=Meadow.Foundation.Sensors.Environmental.DFRobotGravityDOMeter&version=

// Install Meadow.Foundation.Sensors.Environmental.DFRobotGravityDOMeter as a Cake Tool
#tool nuget:?package=Meadow.Foundation.Sensors.Environmental.DFRobotGravityDOMeter&version=


DFRobot analog gravity dissolved oxygen sensor

The DFRobotGravityDOMeter library is designed for the Wilderness Labs Meadow .NET IoT platform and is part of Meadow.Foundation.

The Meadow.Foundation peripherals library is an open-source repository of drivers and libraries that streamline and simplify adding hardware to your C# .NET Meadow IoT application.

For more information on developing for Meadow, visit

To view all Wilderness Labs open-source projects, including samples, visit


DFRobotGravityDOMeter sensor;

public override Task Initialize()

    sensor = new DFRobotGravityDOMeter(Device.Pins.A01);

    // Example that uses an IObservable subscription to only be notified when the saturation changes
    var consumer = DFRobotGravityDOMeter.CreateObserver(
        handler: result =>
            string oldValue = (result.Old is { } old) ? $"{old.MilligramsPerLiter:n0}" : "n/a";
            string newValue = $"{result.New.MilligramsPerLiter:n0}";
            Resolver.Log.Info($"New: {newValue}mg/l, Old: {oldValue}mg/l");
        filter: null

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

    return Task.CompletedTask;

public override async Task Run()

    await ReadSensor();


protected async Task ReadSensor()
    var concentration = await sensor.Read();
    Resolver.Log.Info($"Initial concentration: {concentration.MilligramsPerLiter:N0}mg/l");

How to Contribute

Need Help?

If you have questions or need assistance, please join the Wilderness Labs community on Slack.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.1 is compatible. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

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Version Downloads Last updated 0 4/23/2024
1.10.2 40 4/17/2024 59 4/15/2024 54 4/11/2024 35 4/5/2024
1.10.0 82 3/26/2024 64 3/25/2024 57 3/19/2024 56 3/13/2024 94 3/6/2024 73 3/6/2024 81 3/1/2024
1.9.0 102 2/27/2024 59 2/23/2024 58 2/22/2024 65 2/20/2024 67 2/13/2024 62 2/6/2024 58 2/1/2024 61 1/24/2024 105 1/20/2024
1.8.0 140 1/16/2024
1.7.0 107 1/9/2024 93 1/3/2024 74 12/27/2023 90 12/20/2023