The source code of V1.0 of my GHI Electronics TinyCLR-OS RFM9X/SX127X library is on GitHub.
I initially started with a Dragino LoRa Shield for Arduino but have tested with an Elecrow RFM95 shield as well.
A sample application which shows how to send/receive address/un-addresses payloads
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namespace devMobile.IoT.Rfm9x.LoRaDeviceClient
{
using System;
using System.Diagnostics;
using System.Text;
using System.Threading;
using GHIElectronics.TinyCLR.Pins;
using devMobile.IoT.Rfm9x;
class Program
{
static void Main()
{
const string DeviceName = "FEZLoRa";
#if ADDRESSED_MESSAGES_PAYLOAD
const string HostName = "LoRaIoT1";
#endif
const double Frequency = 915000000.0;
byte MessageCount = System.Byte.MaxValue;
Rfm9XDevice rfm9XDevice = new Rfm9XDevice(FEZ.GpioPin.D10, FEZ.GpioPin.D9, FEZ.GpioPin.D2);
rfm9XDevice.Initialise(Frequency, paBoost: true, rxPayloadCrcOn: true);
#if DEBUG
rfm9XDevice.RegisterDump();
#endif
rfm9XDevice.OnReceive += Rfm9XDevice_OnReceive;
#if ADDRESSED_MESSAGES_PAYLOAD
rfm9XDevice.Receive(UTF8Encoding.UTF8.GetBytes(DeviceName));
#else
rfm9XDevice.Receive();
#endif
rfm9XDevice.OnTransmit += Rfm9XDevice_OnTransmit;
Thread.Sleep(10000);
while (true)
{
string messageText = string.Format("Hello from {0} ! {1}", DeviceName, MessageCount);
MessageCount -= 1;
byte[] messageBytes = UTF8Encoding.UTF8.GetBytes(messageText);
Debug.WriteLine($"{DateTime.Now:HH:mm:ss}-TX {messageBytes.Length} byte message {messageText}");
#if ADDRESSED_MESSAGES_PAYLOAD
rfm9XDevice.Send(UTF8Encoding.UTF8.GetBytes(HostName), messageBytes);
#else
rfm9XDevice.Send(messageBytes);
#endif
Thread.Sleep(10000);
}
}
private static void Rfm9XDevice_OnReceive(object sender, Rfm9XDevice.OnDataReceivedEventArgs e)
{
try
{
string messageText = UTF8Encoding.UTF8.GetString(e.Data);
#if ADDRESSED_MESSAGES_PAYLOAD
string addressText = UTF8Encoding.UTF8.GetString(e.Address);
Debug.WriteLine($@"{DateTime.Now:HH:mm:ss}-RX From {addressText} PacketSnr {e.PacketSnr} Packet RSSI {e.PacketRssi}dBm RSSI {e.Rssi}dBm = {e.Data.Length} byte message ""{messageText}""");
#else
Debug.WriteLine($@"{DateTime.Now:HH:mm:ss}-RX PacketSnr {e.PacketSnr} Packet RSSI {e.PacketRssi}dBm RSSI {e.Rssi}dBm = {e.Data.Length} byte message ""{messageText}""");
#endif
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
}
private static void Rfm9XDevice_OnTransmit(object sender, Rfm9XDevice.OnDataTransmitedEventArgs e)
{
Debug.WriteLine($"{DateTime.Now:HH:mm:ss}-TX Done");
}
}
}
The addressing support is pretty basic as my goal was a library that I could extend with optional functionality like tamper detection via signing and privacy via payload encryption, mesh network support etc.
The library works but should be treated as late beta.
