Meadow.Foundation.Sensors.Moisture.Capacitive 1.4.0.8-beta

Meadow.Foundation.Sensors.Moisture.Capacitive

Analog capacitive soil moisture sensor

The Capacitive 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 developer.wildernesslabs.co.

To view all Wilderness Labs open-source projects, including samples, visit github.com/wildernesslabs.

Usage

Capacitive capacitive;

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

    capacitive = new Capacitive(
        Device.Pins.A00,
        minimumVoltageCalibration: new Voltage(2.84f),
        maximumVoltageCalibration: new Voltage(1.63f)
    );

    // Example that uses an IObservable subscription to only be notified when the moisture changes by filter defined.
    var consumer = Capacitive.CreateObserver(
        handler: result =>
        {
            string oldValue = (result.Old is { } old) ? $"{old:n2}" : "n/a";
            Resolver.Log.Info($"Subscribed - " +
                $"new: {result.New}, " +
                $"old: {oldValue}");
        },
        filter: null
    );
    capacitive.Subscribe(consumer);

    // classical .NET events can also be used:
    capacitive.MoistureUpdated += (sender, result) =>
    {
        string oldValue = (result.Old is { } old) ? $"{old:n2}" : "n/a";
        Resolver.Log.Info($"Updated - New: {result.New}, Old: {oldValue}");
    };

    //==== One-off reading use case/pattern
    ReadSensor().Wait();

    capacitive.StartUpdating(TimeSpan.FromMilliseconds(1000));

    return Task.CompletedTask;
}

protected async Task ReadSensor()
{
    var moisture = await capacitive.Read();
    Resolver.Log.Info($"Initial moisture: {moisture:n2}");
}

How to Contribute

• Found a bug? Report an issue
• Have a feature idea or driver request? Open a new feature request
• Want to contribute code? Fork the Meadow.Foundation repository and submit a pull request against the develop branch

Need Help?

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