Meadow.Foundation.Sensors.Light.AnalogLightSensor

AnalogLightSensor
Status
Source code	GitHub
NuGet package

Code Example

AnalogLightSensor analogLightSensor;

publicoverrideTaskInitialize()
{
 Resolver.Log.Info("Initializing...");

// configure our AnalogLightSensor sensor
 analogLightSensor =newAnalogLightSensor(
analogPin: Device.Pins.A03);

//==== IObservable Pattern with an optional notification filter.
var consumer = AnalogLightSensor.CreateObserver(
handler: result => Resolver.Log.Info($"Observer filter satisfied: {result.New.Lux:N2} lux, old: {result.Old.Value.Lux:N2} lux"),

// only notify if the change is greater than 0.5
 filter: result =>
{
if(result.Old is{} old)
{
return(result.New - old).Abs().Lux >0.5;// returns true if > 0.5 change.
}
returnfalse;
}
// if you want to always get notified, pass null for the filter:
//filter: null
);
 analogLightSensor.Subscribe(consumer);

// classical .NET events can also be used:
 analogLightSensor.Updated +=(sender, result)=>
 Resolver.Log.Info($"Lux changed: {result.New.Lux:N2} lux, old: {result.Old?.Lux:N2} lux");

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

// Spin up the sampling thread so that events are raised and IObservable notifications are sent.
 analogLightSensor.StartUpdating(TimeSpan.FromMilliseconds(1000));

return Task.CompletedTask;
}

protectedasyncTaskReadIlluminance()
{
var illuminance =await analogLightSensor.Read();
 Resolver.Log.Info($"Initial lux: {illuminance.Lux:N2} lux");
}

Sample project(s) available on GitHub