The source code of my nanoFramework RAK811 Module library is now available on GitHub. My test harness (I plan to add more nanoFramework supported devices) uses an STM32F769 Discovery and a modified RAK811 LPWAN Evaluation Board(EVB).
A sample application which shows how to connect using Over the Air Activation(OTAA) or Activation By Personalisation(ABP) then send and receive byte array/Binary Coded Decimal(BCD) messages .
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// Copyright (c) June 2020, devMobile Software
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// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
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//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
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#define ST_STM32F769I_DISCOVERY // nanoff --target ST_STM32F769I_DISCOVERY --update
#define PAYLOAD_BCD
//#define PAYLOAD_BYTES
#define OTAA
//#define ABP
#define CONFIRMED
namespace devMobile.IoT.Rak811LoRaWanDeviceClient
{
using System;
using System.Threading;
using System.Diagnostics;
using Windows.Devices.SerialCommunication;
using devMobile.IoT.LoRaWan;
public class Program
{
#if ST_STM32F769I_DISCOVERY
private const string SerialPortId = "COM6";
#endif
#if OTAA
private const string DevEui = "...";
private const string AppEui = "...";
private const string AppKey = "...";
#endif
#if ABP
private const string DevAddress = "...";
private const string NwksKey = "...";
private const string AppsKey = "...";
#endif
private const string Region = "AS923";
private static readonly TimeSpan JoinTimeOut = new TimeSpan(0, 0, 10);
private static readonly TimeSpan SendTimeout = new TimeSpan(0, 0, 10);
private const byte MessagePort = 1;
#if PAYLOAD_BCD
private const string PayloadBcd = "48656c6c6f204c6f526157414e"; // Hello LoRaWAN in BCD
#endif
#if PAYLOAD_BYTES
private static readonly byte[] PayloadBytes = { 0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x20, 0x4c, 0x6f, 0x52, 0x61, 0x57, 0x41, 0x4e}; // Hello LoRaWAN in bytes
#endif
public static void Main()
{
Result result;
Debug.WriteLine("devMobile.IoT.Rak811LoRaWanDeviceClient starting");
Debug.WriteLine($"Ports :{Windows.Devices.SerialCommunication.SerialDevice.GetDeviceSelector()}");
try
{
using ( Rak811LoRaWanDevice device = new Rak811LoRaWanDevice())
{
result = device.Initialise(SerialPortId, 9600, SerialParity.None, 8, SerialStopBitCount.One);
if (result != Result.Success)
{
Debug.WriteLine($"Initialise failed {result}");
return;
}
#if CONFIRMED
device.OnMessageConfirmation += OnMessageConfirmationHandler;
#endif
device.OnReceiveMessage += OnReceiveMessageHandler;
Debug.WriteLine($"{DateTime.UtcNow:hh:mm:ss} Region {Region}");
result = device.Region(Region);
if (result != Result.Success)
{
Debug.WriteLine($"Region failed {result}");
return;
}
Debug.WriteLine($"{DateTime.UtcNow:hh:mm:ss} ADR On");
result = device.AdrOn();
if (result != Result.Success)
{
Debug.WriteLine($"ADR on failed {result}");
return;
}
#if CONFIRMED
Debug.WriteLine($"{DateTime.UtcNow:hh:mm:ss} Confirmed");
result = device.Confirm(LoRaConfirmType.Confirmed);
if (result != Result.Success)
{
Debug.WriteLine($"Confirm on failed {result}");
return;
}
#else
Debug.WriteLine($"{DateTime.UtcNow:hh:mm:ss} Unconfirmed");
result = device.Confirm(LoRaConfirmType.Unconfirmed);
if (result != Result.Success)
{
Debug.WriteLine($"Confirm off failed {result}");
return;
}
#endif
#if OTAA
Debug.WriteLine($"{DateTime.UtcNow:hh:mm:ss} OTAA");
result = device.OtaaInitialise(DevEui, AppEui, AppKey);
if (result != Result.Success)
{
Debug.WriteLine($"OTAA Initialise failed {result}");
return;
}
#endif
#if ABP
Debug.WriteLine($"{DateTime.UtcNow:hh:mm:ss} ABP");
result = device.AbpInitialise(DevAddress, NwksKey, AppsKey);
if (result != Result.Success)
{
Debug.WriteLine($"ABP Initialise failed {result}");
return;
}
#endif
Debug.WriteLine($"{DateTime.UtcNow:hh:mm:ss} Join start Timeout:{JoinTimeOut:hh:mm:ss}");
result = device.Join(JoinTimeOut);
if (result != Result.Success)
{
Debug.WriteLine($"Join failed {result}");
return;
}
Debug.WriteLine($"{DateTime.UtcNow:hh:mm:ss} Join finish");
while (true)
{
#if PAYLOAD_BCD
Debug.WriteLine($"{DateTime.UtcNow:hh:mm:ss} Send Timeout:{SendTimeout:hh:mm:ss} port:{MessagePort} payload BCD:{PayloadBcd}");
result = device.Send(MessagePort, PayloadBcd, SendTimeout);
#endif
#if PAYLOAD_BYTES
Debug.WriteLine($"{DateTime.UtcNow:hh:mm:ss} Send Timeout:{SendTimeout:hh:mm:ss} port:{MessagePort} payload Bytes:{BitConverter.ToString(PayloadBytes)}");
result = device.Send(MessagePort, PayloadBytes, SendTimeout);
#endif
if (result != Result.Success)
{
Debug.WriteLine($"Send failed {result}");
}
// if we sleep module too soon response is missed
Thread.Sleep(new TimeSpan( 0,0,5));
Debug.WriteLine($"{DateTime.UtcNow:hh:mm:ss} Sleep");
result = device.Sleep();
if (result != Result.Success)
{
Debug.WriteLine($"Sleep failed {result}");
return;
}
Thread.Sleep(new TimeSpan(0, 5, 0));
Debug.WriteLine($"{DateTime.UtcNow:hh:mm:ss} Wakeup");
result = device.Wakeup();
if (result != Result.Success)
{
Debug.WriteLine($"Wakeup failed {result}");
return;
}
}
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
}
static void OnMessageConfirmationHandler(int rssi, int snr)
{
Debug.WriteLine($"{DateTime.UtcNow:hh:mm:ss} Send Confirm RSSI:{rssi} SNR:{snr}");
}
static void OnReceiveMessageHandler(int port, int rssi, int snr, string payloadBcd)
{
byte[] payloadBytes = Rak811LoRaWanDevice.BcdToByes(payloadBcd);
Debug.WriteLine($"{DateTime.UtcNow:hh:mm:ss} Receive Message RSSI:{rssi} SNR:{snr} Port:{port} Payload:{payloadBcd} PayLoadBytes:{BitConverter.ToString(payloadBytes)}");
}
}
}
I have LoRaWAN shields from GobalSat and EmOne on order.
The library works but should be treated as late beta.
devMobile's blog 