Meadow.Foundation.Grove.Sensors.Sound.LoudnessSensor

LoudnessSensor
Status
Source code	GitHub
NuGet package

Code Example

LoudnessSensor sensor;

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

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

    var consumer = LoudnessSensor.CreateObserver(
        handler: result => Resolver.Log.Info($"Observer filter satisfied: {result.New.Millivolts:N2}mV, old: {result.Old?.Millivolts:N2}mV"),
        filter: result =>
        {
            if (result.Old is { } old)
            { //c# 8 pattern match syntax. checks for !null and assigns var.
                return (result.New - old).Abs().Millivolts > 500;
            }
            return false;
        });
    sensor.Subscribe(consumer);

    sensor.Updated += (sender, result) =>
    {
        Resolver.Log.Info($"Voltage Changed, new: {result.New.Millivolts:N2}mV, old: {result.Old?.Millivolts:N2}mV");
    };

    return Task.CompletedTask;
}

public override async Task Run()
{
    var result = await sensor.Read();
    Resolver.Log.Info($"Initial read: {result.Millivolts:N2}mV");

    sensor.StartUpdating(TimeSpan.FromMilliseconds(1000));
}

Sample project(s) available on GitHub

Wiring Example

LoudnessSensor	Meadow Pin
GND	GND
VCC	3.3V
RX	D01
TX	D00

Class LoudnessSensor

Represents a Loudness Sensor

Assembly: LoudnessSensor.dll

View Source

Declaration

public class LoudnessSensor : AnalogSamplingBase, IObservable<IChangeResult<Voltage>>, ISamplingSensor<Voltage>, ISensor<Voltage>, ISensor, ISamplingSensor

Inheritance: System.Object -> Meadow.Foundation.ObservableBase<Meadow.Units.Voltage> -> Meadow.Foundation.SamplingSensorBase<Meadow.Units.Voltage> -> Meadow.Foundation.Sensors.Base.AnalogSamplingBase

Implements:
System.IObservable<Meadow.IChangeResult<Meadow.Units.Voltage>>, Meadow.Peripherals.Sensors.ISamplingSensor<Meadow.Units.Voltage>, Meadow.Peripherals.Sensors.ISensor<Meadow.Units.Voltage>, Meadow.Peripherals.Sensors.ISensor, Meadow.Peripherals.Sensors.ISamplingSensor

Implements

• System.IObservable<Meadow.IChangeResult<Meadow.Units.Voltage>>
• Meadow.Peripherals.Sensors.ISamplingSensor<Meadow.Units.Voltage>
• Meadow.Peripherals.Sensors.ISensor<Meadow.Units.Voltage>
• Meadow.Peripherals.Sensors.ISensor
• Meadow.Peripherals.Sensors.ISamplingSensor