Forum Discussion

Hoobiechoobie's avatar
Hoobiechoobie
Icon for Codemasters Team rankCodemasters Team
3 years ago

F1 22 UDP Specification

Here is the current specification for the UDP telemetry output system for F1 22.  To report any bugs with the UDP system, please add a new topic into the bug reporting section of this forum and ou...
f1 22
cjorgens79's avatar
cjorgens79
3 years ago
@IkoRein
re 3) It seems that the Final Classification packet + Session History packets are still sent out more than once at the end of the race, i.e. after the 'SEND' packet. In my testing I got these sent out 3 times after 'SEND'. Could this be fixed? (I have the trace saved, if you need that, or I can post separately just the end of the trace, if that is better).

I do not agree with this request. While it might work fine on a fixed network, UDP is not a guaranteed protocol and packet loss should be expected on wireless networks. The packets are sent multiple times to allow for possible packet loss so in almost all cases the final classification and history can be properly recorded at the end of a session.

re 1) I add my support to this one for sure, it is currently problematic having newer versions of the game send out telemetry acting as older versions as things like leaderboards are then inaccurate.
IkoRein's avatar
IkoRein
Seasoned Adventurer
3 years ago

@cjorgens79I see the issue with the missing packets. Do you happen to also see missing 'SEND' packets from the network? And do you have to cope with them? Most of my users use the Tool locally, but some have race engineers sitting in other locations, and then the packets must travel through the internet and then the packet loss can sometimes be a real issue.

Regarding my request, I was just not sure, if it was intentional to send so many packets or a "bug" in the system. I have built into my Tool system to detect the "duplicates". as the extra final packets were ruining the race history saves.

Cheers.

  • cjorgens79's avatar
    cjorgens79
    3 years ago
    @IkoRein Any packet type in the telemetry can be lost due to the nature of UDP and networks. I would expect packet loss over the internet to typically be higher than over wifi, however there are so many variables affecting the quality of the connection that it will be different for each user. Basically you need to be able to handle potential packet loss of any packet type and deal with it as best you can, that is why things like the final packets are sent multiple times which means you will usually be able to get enough of them to get a complete result. So as you mentioned, handling the duplicates is just part of writing the integration.

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