static void Main(string[] args)
{
	int sendCount = 0;
...
#if NETDUINO3_WIFI
	// Arduino D10->PB10
	int chipSelectLine = PinNumber('B', 10);
	// Arduino D9->PE5
	int resetPinNumber = PinNumber('E', 5);
	// Arduino D2 -PA3
	int dio0PinNumber = PinNumber('A', 3);
	// Arduino D6 - PB9
	int dio1PinNumber = PinNumber('B', 9);
	// Arduino D7
	int dio2PinNumber = PinNumber('A', 1);
	// Not connected on Dragino LoRa shield
	//int dio3PinNumber = PinNumber('A', 1);
	//  Not connected on Dragino LoRa shield
	//int dio4PinNumber = PinNumber('A', 1);
	// Arduino D8
	int dio5PinNumber = PinNumber('A', 0);
#endif
...
	Console.WriteLine("devMobile.IoT.SX127xLoRaDevice Client starting");

	try
	{
		var settings = new SpiConnectionSettings(SpiBusId, chipSelectLine)
		{
			ClockFrequency = 1000000,
			Mode = SpiMode.Mode0,// From SemTech docs pg 80 CPOL=0, CPHA=0
			SharingMode = SpiSharingMode.Shared
		};

		using (SpiDevice spiDevice = new SpiDevice(settings))
		using (GpioController gpioController = new GpioController())
		{
...
#if NETDUINO3_WIFI || ST_STM32F769I_DISCOVERY
			sx127XDevice = new SX127XDevice(spiDevice, gpioController, dio0Pin:dio0PinNumber, resetPin:resetPinNumber, dio1Pin: dio1PinNumber, dio2Pin: dio2PinNumber);
#endif

			sx127XDevice.Initialise(Frequency
						, lnaGain: Configuration.RegLnaLnaGain.Default
						, lnaBoost: true
						, powerAmplifier: Configuration.RegPAConfigPASelect.PABoost							
						, rxPayloadCrcOn: true
						, rxDoneignoreIfCrcMissing: false
						);

#if DEBUG
			sx127XDevice.RegisterDump();
#endif

			//sx127XDevice.OnRxTimeout += Sx127XDevice_OnRxTimeout;
			sx127XDevice.OnReceive += SX127XDevice_OnReceive;
			//sx127XDevice.OnPayloadCrcError += Sx127XDevice_OnPayloadCrcError;
			//sx127XDevice.OnValidHeader += Sx127XDevice_OnValidHeader;
			sx127XDevice.OnTransmit += SX127XDevice_OnTransmit;
			//sx127XDevice.OnChannelActivityDetectionDone += Sx127XDevice_OnChannelActivityDetectionDone;
			//sx127XDevice.OnFhssChangeChannel += Sx127XDevice_OnFhssChangeChannel;
			//sx127XDevice.OnChannelActivityDetected += SX127XDevice_OnChannelActivityDetected;

			sx127XDevice.Receive();
			//sx127XDevice.ChannelActivityDetect();

			Thread.Sleep(500);

			while (true)
			{
				string messageText = $"Hello LoRa from .NET nanoFramework Count {sendCount+=1}!";

				byte[] messageBytes = UTF8Encoding.UTF8.GetBytes(messageText);
				Console.WriteLine($"{DateTime.UtcNow:HH:mm:ss}-TX {messageBytes.Length} byte message {messageText}");
				sx127XDevice.Send(messageBytes);

				Thread.Sleep(50000);

				Console.WriteLine($"{DateTime.UtcNow:HH:mm:ss} Random {sx127XDevice.Random()}");
			}
		}
	}
	catch (Exception ex)
	{
		Console.WriteLine(ex.Message);
	}
}

public SX127XDevice(SpiDevice spiDevice, GpioController gpioController,
	int dio0Pin,
	int resetPin = 0, // Odd order so as not to break exisiting code
	int dio1Pin = 0,
	int dio2Pin = 0,
	int dio3Pin = 0,
	int dio4Pin = 0,
	int dio5Pin = 0
	)
{
	_gpioController = gpioController;

	// Factory reset pin configuration
	if (resetPin != 0)
	{
		_resetPin = resetPin;
		_gpioController.OpenPin(resetPin, PinMode.Output);

		_gpioController.Write(resetPin, PinValue.Low);
		Thread.Sleep(20);
		_gpioController.Write(resetPin, PinValue.High);
		Thread.Sleep(50);
	}

	_registerManager = new RegisterManager(spiDevice, RegisterAddressReadMask, RegisterAddressWriteMask);

	// Once the pins setup check that SX127X chip is present
	Byte regVersionValue = _registerManager.ReadByte((byte)Configuration.Registers.RegVersion);
	if (regVersionValue != Configuration.RegVersionValueExpected)
	{
		throw new ApplicationException("Semtech SX127X not found");
	}

	// See Table 18 DIO Mapping LoRa® Mode
	Configuration.RegDioMapping1 regDioMapping1Value = Configuration.RegDioMapping1.Dio0None;
	regDioMapping1Value |= Configuration.RegDioMapping1.Dio1None;
	regDioMapping1Value |= Configuration.RegDioMapping1.Dio2None;
	regDioMapping1Value |= Configuration.RegDioMapping1.Dio3None;
	_registerManager.WriteByte((byte)Configuration.Registers.RegDioMapping1, (byte)regDioMapping1Value);

	// Currently no easy way to test this with available hardware
	//Configuration.RegDioMapping2 regDioMapping2Value = Configuration.RegDioMapping2.Dio4None;
	//regDioMapping2Value = Configuration.RegDioMapping2.Dio5None;
	//_registerManager.WriteByte((byte)Configuration.Registers.RegDioMapping2, (byte)regDioMapping2Value);

	// Interrupt pin for RXDone, TXDone, and CadDone notification 
	_gpioController.OpenPin(dio0Pin, PinMode.InputPullDown);
	_gpioController.RegisterCallbackForPinValueChangedEvent(dio0Pin, PinEventTypes.Rising, InterruptGpioPin_ValueChanged);

	// RxTimeout, FhssChangeChannel, and CadDetected
	if (dio1Pin != 0)
	{
		_gpioController.OpenPin(dio1Pin, PinMode.InputPullDown);
		_gpioController.RegisterCallbackForPinValueChangedEvent(dio1Pin, PinEventTypes.Rising, InterruptGpioPin_ValueChanged);
	}

	// FhssChangeChannel, FhssChangeChannel, and FhssChangeChannel
	if (dio2Pin != 0)
	{
		_gpioController.OpenPin(dio2Pin, PinMode.InputPullDown);
		_gpioController.RegisterCallbackForPinValueChangedEvent(dio2Pin, PinEventTypes.Rising, InterruptGpioPin_ValueChanged);
	}

	// CadDone, ValidHeader, and PayloadCrcError
	if (dio3Pin != 0)
	{
		_gpioController.OpenPin(dio3Pin, PinMode.InputPullDown);
		_gpioController.RegisterCallbackForPinValueChangedEvent(dio3Pin, PinEventTypes.Rising, InterruptGpioPin_ValueChanged);
	}

	// CadDetected, PllLock and PllLock
	if (dio4Pin != 0)
	{
		_gpioController.OpenPin(dio4Pin, PinMode.InputPullDown);
		_gpioController.RegisterCallbackForPinValueChangedEvent(dio4Pin, PinEventTypes.Rising, InterruptGpioPin_ValueChanged);
	}

	// ModeReady, ClkOut and ClkOut
	if (dio5Pin != 0)
	{
		_gpioController.OpenPin(dio5Pin, PinMode.InputPullDown);
		_gpioController.RegisterCallbackForPinValueChangedEvent(dio5Pin, PinEventTypes.Rising, InterruptGpioPin_ValueChanged);
	}
}

private void InterruptGpioPin_ValueChanged(object sender, PinValueChangedEventArgs pinValueChangedEventArgs)
{
	Byte regIrqFlagsToClear = (byte)Configuration.RegIrqFlags.ClearNone;

	// Read RegIrqFlags to see what caused the interrupt
	Byte irqFlags = _registerManager.ReadByte((byte)Configuration.Registers.RegIrqFlags);

	//Console.WriteLine($"IrqFlags 0x{irqFlags:x} Pin:{pinValueChangedEventArgs.PinNumber}");

	// Check RxTimeout for inbound message
	if ((irqFlags & (byte)Configuration.RegIrqFlagsMask.RxTimeoutMask) == (byte)Configuration.RegIrqFlags.RxTimeout)
	{
		regIrqFlagsToClear |= (byte)Configuration.RegIrqFlags.RxTimeout;

		ProcessRxTimeout(irqFlags);
	}

	// Check RxDone for inbound message
	if ((irqFlags & (byte)Configuration.RegIrqFlagsMask.RxDoneMask) == (byte)Configuration.RegIrqFlags.RxDone)
	{
		regIrqFlagsToClear |= (byte)Configuration.RegIrqFlags.RxDone;

		ProcessRxDone(irqFlags);
	}

	// Check PayLoadCrcError for inbound message
	if ((irqFlags & (byte)Configuration.RegIrqFlagsMask.PayLoadCrcErrorMask) == (byte)Configuration.RegIrqFlags.PayLoadCrcError)
	{
		regIrqFlagsToClear |= (byte)Configuration.RegIrqFlags.PayLoadCrcError;

		ProcessPayloadCrcError(irqFlags);
	}

	// Check ValidHeader for inbound message
	if ((irqFlags & (byte)Configuration.RegIrqFlagsMask.ValidHeaderMask) == (byte)Configuration.RegIrqFlags.ValidHeader)
	{
		regIrqFlagsToClear |= (byte)Configuration.RegIrqFlags.ValidHeader;

		ProcessValidHeader(irqFlags);
	}

	// Check TxDone for outbound message
	if ((irqFlags & (byte)Configuration.RegIrqFlagsMask.TxDoneMask) == (byte)Configuration.RegIrqFlags.TxDone)
	{
		regIrqFlagsToClear |= (byte)Configuration.RegIrqFlags.TxDone;

		ProcessTxDone(irqFlags);
	}

	// Check Channel Activity Detection done 
	if (((irqFlags & (byte)Configuration.RegIrqFlagsMask.CadDoneMask) == (byte)Configuration.RegIrqFlags.CadDone))
	{
		regIrqFlagsToClear |= (byte)Configuration.RegIrqFlags.CadDone;

		ProcessChannelActivityDetectionDone(irqFlags);
	}

	// Check FhssChangeChannel for inbound message
	if ((irqFlags & (byte)Configuration.RegIrqFlagsMask.FhssChangeChannelMask) == (byte)Configuration.RegIrqFlags.FhssChangeChannel)
	{
		regIrqFlagsToClear |= (byte)Configuration.RegIrqFlags.FhssChangeChannel;

		ProcessFhssChangeChannel(irqFlags);
	}

	// Check Channel Activity Detected 
	if (((irqFlags & (byte)Configuration.RegIrqFlagsMask.CadDetectedMask) == (byte)Configuration.RegIrqFlags.CadDetected))
	{
		regIrqFlagsToClear |= (byte)Configuration.RegIrqFlags.CadDetected;

		ProcessChannelActivityDetected(irqFlags);
	}

	_registerManager.WriteByte((byte)Configuration.Registers.RegIrqFlags, regIrqFlagsToClear);
}

private void ProcessRxTimeout(byte irqFlags)
{
	OnRxTimeoutEventArgs onRxTimeoutArgs = new OnRxTimeoutEventArgs();

	OnRxTimeout?.Invoke(this, onRxTimeoutArgs);
}

private void ProcessRxDone(byte irqFlags)
{
	byte[] payloadBytes;
...
}

devMobile.IoT.SX127xLoRaDevice Client starting
Register dump
Register 0x01 - Value 0X80
...
Register 0x4d - Value 0X84

00:00:09-CAD Detection Done
00:00:09-CAD Detected
00:00:09-RX PacketSnr 0.0 Packet RSSI -100dBm RSSI -96dBm = 9 byte message hello 41
00:00:09-RX PacketSnr 0.0 Packet RSSI -100dBm RSSI -96dBm = 9 byte message hello 42
00:00:09-RX PacketSnr 0.0 Packet RSSI -100dBm RSSI -96dBm = 9 byte message hello 43
00:00:09-RX PacketSnr 0.0 Packet RSSI -100dBm RSSI -96dBm = 9 byte message hello 44
00:00:09-RX PacketSnr 0.0 Packet RSSI -100dBm RSSI -96dBm = 9 byte message hello 45
00:00:09-RX PacketSnr 0.0 Packet RSSI -100dBm RSSI -94dBm = 9 byte message hello 46
00:00:09-RX PacketSnr 0.0 Packet RSSI -99dBm RSSI -94dBm = 9 byte message hello 47
00:00:19-RX PacketSnr 0.0 Packet RSSI -100dBm RSSI -96dBm = 9 byte message hello 48