Remarks

IDxxLA
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

IRfidReader rfidReader;

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

    rfidReader = new IDxxLA(Device, Device.PlatformOS.GetSerialPortName("COM1"));

    // subscribe to event
    rfidReader.RfidRead += RfidReaderOnTagRead;

    // subscribe to IObservable
    rfidReader.Subscribe(new RfidObserver());

    return Task.CompletedTask;
}

public override Task Run()
{ 
    rfidReader.StartReading();

    return Task.CompletedTask;
}

private void RfidReaderOnTagRead(object sender, RfidReadResult e)
{
    if (e.Status == RfidValidationStatus.Ok) {
        Resolver.Log.Info($"From event - Tag value is {DebugInformation.Hexadecimal(e.RfidTag)}");
        return;
    }

    Resolver.Log.Error($"From event - Error {e.Status}");
}

private class RfidObserver : IObserver<byte[]>
{
    public void OnCompleted()
    {
        Resolver.Log.Info("From IObserver - RfidReader has terminated, no more events will be emitted.");
    }

    public void OnError(Exception error)
    {
        Resolver.Log.Error($"From IObserver - {error}");
    }

    public void OnNext(byte[] value)
    {
        Resolver.Log.Info($"From IObserver - Tag value is {DebugInformation.Hexadecimal(value)}");
    }
}

Sample project(s) available on GitHub

Characteristic	Locus
Inheritance	System.Object > IDxxLA
Implements	IRfidReader IObservable<System.Byte[]> IDisposable
Namespace	Meadow.Foundation.Sensors.Radio.Rfid
Assembly	IDxxLA.dll

Syntax

public class IDxxLA : object, IRfidReader, IObservable<byte[]>, IDisposable

Constructors

IDxxLA(ISerialMessageController, SerialPortName)

Create an IDxxLA RFID reader

Declaration

public IDxxLA(ISerialMessageController device, SerialPortName serialPortName)

Parameters

Type	Name	Description
ISerialMessageController	device	Device to use
SerialPortName	serialPortName	Port name to use

IDxxLA(ISerialMessagePort)

Create an IDxxLA RFID reader using an existing port.

Declaration

public IDxxLA(ISerialMessagePort serialPort)

Parameters

Type	Name	Description
ISerialMessagePort	serialPort

Remarks

Be sure to use suitable settings when creating the serial port. Default BaudRate and DataBits are exposed as constants.

Fields

BaudRate

The baud rate (9600)

Declaration

public const int BaudRate = null

Field Value

Type	Description
System.Int32

DataBits

Data bits (7)

Declaration

public const int DataBits = null

Field Value

Type	Description
System.Int32

Properties

LastRead

A cached copy of the last successfully read RFID tag.

Declaration

public byte[] LastRead { get; }

Property Value

Type	Description
System.Byte[]	The last read RFID tag.

Methods

Dispose()

Dispose of this instance.

Declaration

public void Dispose()

StartReading()

Start reading for RFID tags.

Declaration

public void StartReading()

StopReading()

Stop reading for RFID tags.

Declaration

public void StopReading()

Subscribe(IObserver<Byte[]>)

Subscribe to RFID tag reads. Observer will only receive valid reads, with invalid reads triggering an OnError call. OnComplete will be called if this instance is disposed. This call is thread-safe.

Declaration

public IDisposable Subscribe(IObserver<byte[]> observer)

Parameters

Type	Name	Description
IObserver<System.Byte[]>	observer	The observer to subscribe

Returns

Type	Description
IDisposable	Disposable unsubscriber

Events

RfidRead

Event fired when an RFID tag is read. Check the read status to see if the read was successful.

Declaration

public event RfidReadEventHandler RfidRead

Event Type

Type	Description
RfidReadEventHandler