Tag Archives: RAK3172-E

.NET nanoFramework RAK2305 – RAK3172 Library Usage

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This post covers the usage of my RAK3172LoRaWAN-NetNF library with a RAK3205 WisBlock Wifi Interface Module on a RAK3172 Evaluation Board.

RAK2305 RAK3172 Evaluation Board based test rig

The first time the RAK3172LoRaWANDeviceClient is run the following preprocessor directives may need to be defined to configure the RAK3172 module.

//---------------------------------------------------------------------------------
//#define ST_STM32F769I_DISCOVERY      // nanoff --target ST_STM32F769I_DISCOVERY --update 
//#define  SPARKFUN_ESP32_THING_PLUS  // nanoff --platform esp32 --serialport COM4 --update
//#define RAK_WISBLOCK_RAK2305 // nanoff --update --target ESP32_PSRAM_REV0 --serialport COM4
#define DEVICE_DEVEUI_SET
//#define FACTORY_RESET
//#define PAYLOAD_BCD
#define PAYLOAD_BYTES
#define OTAA
//#define ABP
//#define CONFIRMED
#define UNCONFIRMED
#define REGION_SET
#define ADR_SET
//#define SLEEP
namespace devMobile.IoT.LoRaWAN
{
Visual Studio Debug output for RAK3172LoRaWANDeviceClient full configuration

Once the RAK3172 Module is the RAK3172LoRaWANDeviceClient can be run with only PAYLOAD_BCD or PAYLOAD_BYTES defined

//---------------------------------------------------------------------------------
//#define ST_STM32F769I_DISCOVERY      // nanoff --target ST_STM32F769I_DISCOVERY --update 
//#define  SPARKFUN_ESP32_THING_PLUS  // nanoff --platform esp32 --serialport COM4 --update
//#define RAK_WISBLOCK_RAK2305 // nanoff --update --target ESP32_PSRAM_REV0 --serialport COM4
//#define DEVICE_DEVEUI_SET
//#define FACTORY_RESET
//#define PAYLOAD_BCD
#define PAYLOAD_BYTES
//#define OTAA
//#define ABP
//#define CONFIRMED
//#define UNCONFIRMED
//#define REGION_SET
//#define ADR_SET
//#define SLEEP
namespace devMobile.IoT.LoRaWAN
{
Visual Studio Debug output for RAK3172LoRaWANDeviceClient minimal configuration

When I initially deployed ran the RAK3172LoRaWANDeviceClient the RAK3172LoRaWAN-NetNF library crashed in the OtaaInitialise method. I think this was caused by the RAKwireless Unified Interface V3(RUIV3) “AT+NWM=1” command rebooting the RAK3172 Module. 

// Set the Working mode to LoRaWAN, not/never going todo P2P with this library.
#if DIAGNOSTICS
Debug.WriteLine($" {DateTime.UtcNow:hh:mm:ss} AT+NWM=1");
#endif
Result result = SendCommand("Current Work Mode: LoRaWAN.", "AT+NWM=1", CommandTimeoutDefault);
if (result != Result.Success)
{
#if DIAGNOSTICS
	Debug.WriteLine($" {DateTime.UtcNow:hh:mm:ss} AT+NWM=1 failed {result}");
#endif
	return result;
}

I think it would be reasonable to assume that the device is in the correct mode (the default after a reset to factory) on startup so I removed the LoRa® network work mode configuration code.

.NET nanoFramework RAK2305 – RAK3172 Basic connectivity

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After some experimentation could get a RAK2305 WisBlock Wifi Interface Module running the .NET nanoFramework plugged into the IO Slot of RAK3172 Evaluation Board to send RUIV3 AT Commands to the RAK3172 Module.

RAK2305 + RAK 3172 EVB with FTDI module for Visual Studio 2022 Connectivity

After reviewing the RAK3172 Evaluation Board and RAK2305 WisBlock Wifi Interface Module schematics I realised that the Universal Asynchronous Receiver-Transmistted(UART) transmit and receive pins had to be reversed the with the nanoFramwork ESP32 specific Configuration.SetPinFunction.

namespace devMobile.IoT.LoRaWAN.nanoFramework.RAK.LoraWAN
{ 
   using System;
   using System.Diagnostics;
   using System.IO.Ports;
   using System.Threading;
   using global::nanoFramework.Hardware.Esp32;

   public class Program
   {
      private static SerialPort _SerialPort;

      private const string SerialPortId = "COM2";

      public static void Main()
      {
         Debug.WriteLine("devMobile.IoT.LoRaWAN.nanoFramework.RAK.LoraWAN RAK3172/RAK4630 EVB starting");

         try
         {
            // set GPIO functions for COM2 (this is UART1 on RAK2305)
            Configuration.SetPinFunction(Gpio.IO21, DeviceFunction.COM2_TX);
            Configuration.SetPinFunction(Gpio.IO19, DeviceFunction.COM2_RX);

            Debug.Write("Ports:");
            foreach (string port in SerialPort.GetPortNames())
            {
               Debug.Write($" {port}");
            }
            Debug.WriteLine("");

            using (_SerialPort = new SerialPort(SerialPortId))
            {
               // set parameters
               _SerialPort.BaudRate = 115200;
               _SerialPort.Parity = Parity.None;
               _SerialPort.DataBits = 8;
               _SerialPort.StopBits = StopBits.One;
               _SerialPort.Handshake = Handshake.None;
               _SerialPort.NewLine = "\r\n";
               _SerialPort.ReadTimeout = 1000;

               //_SerialPort.WatchChar = '\n'; // May 2022 WatchChar event didn't fire github issue https://github.com/nanoframework/Home/issues/1035

               _SerialPort.DataReceived += SerialDevice_DataReceived;

               _SerialPort.Open();

               _SerialPort.WatchChar = '\n';

               _SerialPort.ReadExisting(); // Running at 115K2 this was necessary


               for (int i = 0; i < 5; i++)
               {
                  string atCommand;
                  atCommand = "AT+VER=?";
                  //atCommand = "AT+SN=?"; // Empty response?
                  //atCommand = "AT+HWMODEL=?";
                  //atCommand = "AT+HWID=?";
                  //atCommand = "AT+DEVEUI=?";
                  //atCommand = "AT+APPEUI=?";
                  //atCommand = "AT+APPKEY=?";
                  //atCommand = "ATR";
                  //atCommand = "AT+SLEEP=4000";
                  //atCommand = "AT+ATM";
                  //atCommand = "AT?";
                  Debug.WriteLine("");
                  Debug.WriteLine($"{DateTime.UtcNow:hh:mm:ss} {i} TX:{atCommand} bytes:{atCommand.Length}--------------------------------");
                  _SerialPort.WriteLine(atCommand);

                  Thread.Sleep(5000);
               }
            }
            Debug.WriteLine("Done");
         }
         catch (Exception ex)
         {
            Debug.WriteLine(ex.Message);
         }
      }

      private static void SerialDevice_DataReceived(object sender, SerialDataReceivedEventArgs e)
      {
         SerialPort serialPort = (SerialPort)sender;

         switch (e.EventType)
         {
            case SerialData.Chars:
               break;

            case SerialData.WatchChar:
               string response = serialPort.ReadExisting();
               Debug.Write(response);
               break;
            default:
               Debug.Assert(false, $"e.EventType {e.EventType} unknown");
               break;
         }
      }
   }
}

When I requested the version information with “AT+VER=?” the RAK3172 Module responded with version information.