FM-eco4+ Ruptela

I'm use FM-ECO4+ I tested with Trust Track its working fine. But when I change the IP & Port to connect with Traccar its not received any thing on log file.
I'm using Port : 5046
Pls can I get help

Make sure you are using TCP protocol and follow this guide:

https://www.traccar.org/troubleshooting/

we use version 4 of traccar and device ruptela fm eco4 light +s and when we put version 5.4 the device starts to disconnect and when we downgrade the version also from 4.15 the same thing and when we downgrade to version 4.5 everything returns to normal if someone can help us on points and tell us where the problem is

Have you checked logs for errors?

error -emty string -NumberFormatException

Is that from the log? You should probably provide a proper log fragment with a few lines before and after.

the reason why I updated the traccar version for telegram notifications it does not work on version 4 and 4.5