Turns out, if you fit a camera...like a GoPro Session 5 (tiny). It blocks the GPS signal to the data logger / laptrigger.
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BMW being dumb...
- Thread starter alex
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Cool track...
Mugello looking like a crazy mountain pass on the GPS there.
2D are currently 
looking at the setup I sent a picture of.
GPS Mice do not do well with carbon or metal in their way. So the device being sunk into carbon and then with a part metal camera on top is just lunacy.
I'm thinking of flipping the setup and using a small plate (or Gopro flat mount upside down) attached to the BMW GoPro mount and then sticking the GPS mouse on that so it's well clear of the bodywork...or just fitting a normal seat insert and attaching the GPS mouse to the tail piece when I need it.
looking at the setup I sent a picture of.GPS Mice do not do well with carbon or metal in their way. So the device being sunk into carbon and then with a part metal camera on top is just lunacy.
I'm thinking of flipping the setup and using a small plate (or Gopro flat mount upside down) attached to the BMW GoPro mount and then sticking the GPS mouse on that so it's well clear of the bodywork...or just fitting a normal seat insert and attaching the GPS mouse to the tail piece when I need it.
The GoPro mount piece is junk too, snaps (on my 2nd) with a heavier camera and the silver nut on mine now spins and being circular you can't easily stop it without mole grips.
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Hi,
I had similar problems with my laptimer at Mugello last week too. Only this was a Solo 2 DL unit mounted in front of the tank.
Looking at the data, the positional accuracy was pretty good around almost all of the lap apart from on the main straight where the grandstand is.
My suspicion is that with the high grandstand, and possible further shrouding as I was leaning forward to get out of the wind blast, meant the unit couldn’t detect the finish line and hence wasn’t registering laps. Luckily, it looks like the analysis software has resolved this.
Seems these units are very sensitive to not seeing the multiple satellites particularly when going over a finish line. Hence, I was seeing no laptimes.
As you say, Alex, positioning is crucial.
I had similar problems with my laptimer at Mugello last week too. Only this was a Solo 2 DL unit mounted in front of the tank.
Looking at the data, the positional accuracy was pretty good around almost all of the lap apart from on the main straight where the grandstand is.
My suspicion is that with the high grandstand, and possible further shrouding as I was leaning forward to get out of the wind blast, meant the unit couldn’t detect the finish line and hence wasn’t registering laps. Luckily, it looks like the analysis software has resolved this.
Seems these units are very sensitive to not seeing the multiple satellites particularly when going over a finish line. Hence, I was seeing no laptimes.
As you say, Alex, positioning is crucial.
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I never had this issue with mine and iirc it was the session 5 that I was using in the end up, I was using a newer GoPro initially but when that parted ways I had a the older one lying around and used that on a few days without ever having issues with the data logger.
I’m guessing the problem only occurs if you mount the camera directly at the GPS receiver?
I’m guessing the problem only occurs if you mount the camera directly at the GPS receiver?
Yeah it sat over the top of it. Sinking it into carbon isn't good...adding a lump of metal above it, worse. As CJC menitoned the pits and stands may have been a factor too. Either way. The more exposed the better.
Grumplestiltonskin
Well-known member
Alternative mount position if you've got GB racing bullet sliders...
https://reactiveparts.com/gb-racing-bullet-frameslider-gopro-mount.html
https://reactiveparts.com/gb-racing-bullet-frameslider-gopro-mount.html
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