Help Needed: GT7 (PS5) Motion Rig + SimHub at the Same Time – How to Split UDP Telemetry?

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Swer86

1
Germany
Germany
Hi everyone,


I’m Johann, writing from Germany. I've built up a motion rig (NJMotion Compact-R, Logitech G-Pro, Buttkicker) and now I’m working on fine-tuning the technical setup between GT7 on PS5, SimTools, and SimHub. I was hoping to get some help here. I've tried a few steps with chatgpt, but I'm just going around in circles and not getting anywhere.

I’m currently trying to get Gran Turismo 7 (PS5) working with both:

  • ✅ Motion via SimTools v3 (NJMotion Compact-R motion platform)

  • ✅ Dashboards & bass shakers via SimHub v9.8.4
The PS5 sends telemetry via UDP on port 33740. The problem is: only one application can receive the data at a time. Whichever tool is started second fails to receive anything.


My System
  • Game: GT7 on PS5

  • Motion platform: NJMotion Compact-R

  • SimTools v3 with GT7 plugin installed

  • SimHub v9.8.4

  • GT7Proxy (Python version 1.8.0)

  • PC and PS5 are on the same wired LAN

  • Windows 11, Python installed
What works
  • GT7Proxy receives data correctly using:
    python GT7Proxy.py --ps_ip 192.168.178.173

Motion works perfectly via SimTools on port 33740

The GT7 Plugin in SimTools receives XSim data fine


What doesn’t
I want SimHub to receive native GT7 telemetry data on a second port (34000), while SimTools keeps working on 33740.

I tried: python GT7Proxy.py --ps_ip 192.168.178.173 --xsimoutput 33740 --sendport 34000

But SimHub never receives anything.
Also, GT7Proxy shows the following error in the console:
Exception: unpack requires a buffer of 316 bytes

Even though GT7 is running and I’m actively driving.




Already tried:

  • Firewall ports 33740 and 34000 open
  • SimHub listening on UDP 34000 (Live mode active, forwarding disabled)
  • All tools started as admin
  • PS5 reachable by ping
  • I’m in an actual race (not in menu)
  • Tried also --simhub_port and --format gt7 → not supported by my GT7Proxy build
My Question:
Is there a way to make GT7Proxy send both:

  • XSim to SimTools (33740)
  • GT7-native format to SimHub (34000)
    ...at the same time?
  • Or a known working workaround?

Really appreciate any help or config suggestions – this is driving me nuts 😅
Thanks in advance!
 

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