Meadow.Foundation.Sensors.Atmospheric.Bh1900Nux 1.3.1.1-beta

Meadow.Foundation.Sensors.Atmospheric.Bh1900Nux

Rohm BH1900NUX I2C temperature sensor

The Bh1900Nux 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

private Bh1900Nux _sensor;

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

    _sensor = new Bh1900Nux(Device.CreateI2cBus(), Bh1900Nux.Addresses.Default);

    var consumer = Bh1900Nux.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: Temp changed by threshold; new temp: {result.New.Celsius:N2}C, old: {result.Old?.Celsius:N2}C");
        },
        filter: result =>
        {
            //c# 8 pattern match syntax. checks for !null and assigns var.
            if (result.Old is { } old)
            {
                return (result.New - old).Abs().Celsius > 0.5;
            }
            return false;
        }
    );
    _sensor.Subscribe(consumer);

    _sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"  Temperature: {result.New.Celsius:N2}C");
    };
   
    return Task.CompletedTask;
}

public async override Task Run()
{
    var conditions = await _sensor.Read();
    Resolver.Log.Info("Initial Readings:");
    Resolver.Log.Info($"  Temperature: {conditions.Celsius:N2}C");

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