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RE: Multicast support to GridTracker
Hello Jordi
Thank you for your answer.
GridTracker on the Raspberry Pi does not forward to Swisslog on my Windows computer. I have no idea why not. I can transfer files across my network from the Pi to the W11 machine and vice versa. But if I enter the IP of the W11 machine in GT forwarding on the port set up in Swisslog to receive it, nothing happens. In Wireshark I see nothing, not even dumped UDP packets. I am not alone in experiencing this issue as there is thread on the GridTrackerApp io group about it.
I am not using the same port used by JTDX by the way.
The features not seen when only log data is sent to Swisslog is the display of information that Swisslog provides before the QSO is logged. I don't see the Callsign field populated until the actual logging and I don't see the statistical information while the QSO is in progress either. Personally, I think this is one of the many important features of Swisslog that is not available in other logging software. I have been operating without it, having previously had it before changing GT to another computer on the network, but my tolerance for its loss expired.
However, I have solved it (with help from one of the GT group). It is convoluted and not ideal but in the absence of multicast this seems to be the only option. I now have the main primary UDP server in JTDX sending data to Swisslog. The 2nd UDP server feeds a GridTracker application on the Windows machine. This is a 'dummy' application, I do not display it because even with 3 large monitors I do not have screen space (the reason for having GT on a Raspberry Pi in the first place) and it is just running in the background. This GT in Windows will forward to GT on the Raspberry Pi using the Pi's IP address. Why this works whilst nothing works else beats me. It appears that GT will forward to another GT but not to anything else. I must have that wrong but I cannot figure it out. Anyway, now Swisslog gets the full features and GT is working on the Pi. Hooray, success.
If I dispense with Swisslog and use Ham Radio Deluxe instead, I can use multicast transfer from HRD in Windows to GT on the Pi. I don't need the 2nd GT app running in Windows. But no way am I changing from SWL to HRD as you can imagine.
73 de Erik.
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