Meadow.Foundation.Sensors.Environmental.MiniPID2 1.2.1.11-beta

Meadow.Foundation.Sensors.Environmental.MiniPID2

MiniPID2 analog photoionisation (PID) VOC sensor

The MiniPID2 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 of Wilderness Labs open-source projects, including samples, visit github.com/wildernesslabs

Usage

MiniPID2 sensor;

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

    sensor = new MiniPID2(Device.Pins.A01, MiniPID2.MiniPID2Type.PPB_WR);

    var consumer = MiniPID2.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: VOC concentration changed by threshold; new: {result.New.PartsPerBillion:N1}ppm");
        },
        filter: result =>
        {
            if (result.Old is { } oldCon &&
                result.New is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  VOC Concentraion: {result.New.PartsPerMillion:N1}ppm");
        };
    }

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

    return base.Initialize();
}