#19684 Check Lane Detect Missing Lap not working

Closed Created by @slimyjimbo - 13 comments

From @slimyjimbo 13.01.2026, 00:19

I have a check lane which is showing my sector times correctly, but missed lap detection doesn't seem to be working, unless I am misunderstanding it or I don't have it set up correctly. In Settings, I have missed lap detection turned on (announce and suspend the race) and check lane 1 enabled.

During a race, the times of each sector will update properly until I miss a lap when passing the start line due to sensor misalignment or a red flag being triggered. After I miss a lap, when I reach the check lane, the sector time does not update and there is no announcement or suspension of the race. 

Is there something I haven't set up correctly? Thank you.

#1 From @smartrace 13.01.2026, 07:51 Owner

Hi, could you please send a support request from within the app so I can check your data? Thank you!

https://www.smartrace.de/en/the-smartrace-manual/tipps-tricks/making-a-support-request-from-within-smartrace/

#2 From @slimyjimbo 13.01.2026, 20:22

I've just sent it. Thank you!

#3 From @smartrace 14.01.2026, 08:51 Owner

Thank you, the data looks good. I can see that you're using firmware 8339 on your Control Unit. Do you by any chance have another Control Unit with an older firmware (e.g. 5339) to test if it works with this?

#4 From @slimyjimbo 14.01.2026, 17:41

Sorry, I do not. This is the firmware my control unit came with out of the box. I don't suppose a video of the issue I'm experiencing would help? If it would help, I could try to upload it.

#5 From @smartrace 14.01.2026, 18:32 Owner

I strongly assume that the new firmware is causing this issue, since I got a similar report from another user with the same firmware. I doubt there is a general issue with this feature, but unfortunately I don't have a Control Unit here with this firmware version, so I can currently not test it myself. I'll try to get my hands on one.

#6 From @smartrace 27.01.2026, 09:13 Owner

I was finally able to get my hands on a Control Unit with firmware 8339 and can confirm it is a bug in the firmware. The CU just doesn't detect a car crossing sector 1 after it didn't cross the finish line.

I will talk about it directly with Carrera and see if they are willing to do anything about it...

#7 From @slimyjimbo 27.01.2026, 17:21

Thank you for confirming. I'll stay tuned!

#8 From @bronnebergring 17.03.2026, 12:04

Genau dieses Problem habe ich auch. Habe heute ein Video rüber geschickt. Aber dann ist es ja schon bekannt. Habe es zu spät hier gesehen. 

#9 From @slimyjimbo 17.03.2026, 13:52

Until Carrera does something about the firmware, in the meantime, I stopped having this issue when I added a second check lane to my track. Somehow, that makes the first check lane detect missed laps. It's not an ideal solution, but it is a workaround.

#10 From @bronnebergring 17.03.2026, 14:53

Ja schauen wir mal wann der Fehler behoben wird. 👍 Eine zweite Checklane passt bei mir leider nicht. 

#11 From @smartrace 17.03.2026, 17:25 Owner

@slimyjimbo - very interesting, thanks for sharing. But the detection will not work for the 2nd check lane if you enable it in the settings in SmartRace, correct?

#12 From @slimyjimbo 25.03.2026, 03:22

Yes, that's correct. CL 1 detects uncounted laps but CL 2 does not.

#13 From @smartrace 25.03.2026, 15:02 Owner

Carrera now told me that they don't plan to fix this issue, which were to be expected, since they already stopped developing their own app, which was the only (official) way to update the CU's firmware. So this is a dead end unfortunately.

I added this information to the smartrace website, as well as information about the workaround as described by @slimyjimbo - thanks for that!

https://www.smartrace.de/anleitung/tipps-tricks/nicht-gezaehlte-runden-erkennen-mithilfe-von-symbolen-oder-sektorzeitschienen-check-lanes/

https://www.smartrace.de/en/the-smartrace-manual/tipps-tricks/detect-uncounted-laps-and-react-to-it-using-icons-or-check-lanes/

@smartrace closed this 25.03.2026, 15:02
@smartrace added the label iOS 25.03.2026, 15:02

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  • Created by

    @slimyjimbo
    13.01.2026, 00:19

  • Type

    Bug

  • State

    Closed

  • Priority

    normal

  • Product

    SmartRace

  • Labels

    iOS