WSJT-X UDP Monitor

JTMonitor is a small single-file application that monitors outbound UDP traffic from WSJT-X on port 2237 in a Multicast Group. The app is for testing purposes only, and is not designed for production use at this point.

Currently, it only decodes Message 2, or Decodes as per the Network Message Protocol. Later, all outbound messages will be included as appropriate.

Limitations

On Windows, most operators are using JTAlerts (which is Highly Recommended) along with WSJT-X. This package (Windows version) is hard coded to use the rebroadcast UDP port set in JTAlerts, not the native UDP port 2237 from WSJT-X. If you wish to use a different port, you must recompile the application yourself adding the desired port. In future releases this will be a command-line option that removes the hard coding.

In order to run JTAlerts and JTMonitor at the same time, you must enable rebroadcasting in JTAlerts. The following settings were tested and known to work properly.

# Edit JTAlerts Settings
JTAlerts > Settings > Manage Settings > Applications > WSJT-X / JTDX
- Check Rebroadcst WSJT-X UDP packets (receive only)
- Set IP Address to: 127.0.0.1
- Set Port to: 2334
- Save, OK, then exit JTAlerts Settings

Requirements

If you just want to test-run the application, download and install the Runtime 3.0.0-preview7-27912-14 (or later) hosting bundle.

JTMonitor was built using .Net Core 3.0 Preview 7. If you wish to compile the binary, you must download and install the .Net Core SDK 3.0.100-preview7-012821 (or later).

Installation

No Installation is required, just unpack and run from a terminal or browse to the file and double-click.

1. Download the JTMonitor
2. Right Click or otherwise extract in the Downloads Folder
3. Using the file browser, browse to:

- Browse to file:
- C:\Users\Your-User-Name\Downloads\JTMonitor\bin\win10
- Double Click to Run: JTMonitor.exe

If WSJT-X is running, you should start to see decodes appearing in the window, for example:

WSJT-X UDP Monitor
UDP Listen Port .: 2237
Little Endian....: True
Start Date UTC ..: 7/24/2019 5:43:25 AM

Date     UTC     dB   dT   dF   Mode   Message
------------------------------------------------------------
20190724 054315 -14  0.1   405  FT8    CQ VK2FZR QG61
20190724 054315   3  0.0  1356  FT8    VK2WTF N0KQ R-14
20190724 054315  -5  0.1  2868  FT8    CQ WQ6Q CM87
20190724 054330  -3  0.2   867  FT8    UR9QQ KY7M R-07
20190724 054330 -10  0.0  1694  FT8    CQ K7KE DM35
20190724 054330   5  0.0  1842  FT8    YJ0GA KJ0I DM79
20190724 054330 -10  0.0  2176  FT8    WL7CG VK2MI QF55
20190724 054330 -17  0.0  2609  FT8    LY5W NH6ET R-09
20190724 054345 -14  0.1   405  FT8    CQ VK2FZR QG61
20190724 054345   4  0.0  1356  FT8    VK2WTF N0KQ R-14
20190724 054345 -14  0.1  1841  FT8    JE3OUW YJ0GA -18
20190724 054345 -18 -0.8  2342  FT8    YJ0GA WQ5R EM24
20190724 054345  -5  0.1  2868  FT8    VK1MES WQ6Q -21

Exit The Application

To exit (stop monitoring), close the console window using the X in the top right corner.

Uninstall

To uninstall, just delete the JTMonitor.zip file and JTMonitor folder.