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Immersive Matthew

Vive Trackers Slow to Connect

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I have 8 Vive trackers (2018 and up model) and 4 lighthouse base stations version 2.0.  They all track very well along with a Valve Index.  Suddenly during use tonight my Vive Trackers started fading in and out of tracking in the SteamVR window.  This has not happened before to me. Further, some were even turning back into grey hexagons again as if they were just powering on.  Others still were just fading in and out saying they could not be tracked when they were all clearly in the view of the 4 lighthouse base stations. I shut them all off and restarted SteamVR and when I turned each tracker back on they would take 30 seconds or more to appear in SteamVR which has never happened before. They normally appear in SteamVR after being turned on in just a few seconds and start tracking a few seconds after that. Further only 6 of the 8 appeared despite all 8 having green connection lights no matter how long I waited. It seemed very chunky and slow despite CPU, GPU and memory usage being in the low %. All 8 trackers had green lights the entire time, but when I would shut down SteamVR, 3 would remain on and green. When I shutdown SteamVR before, all trackers immediately shut down. I rebooted my PC several times, and again same issue. This never happened until tonight. I cannot tell of this is due to interference from somewhere new, a buggy SteamVR update that I recall happened at some point tonight or maybe the batteries in the trackers need to be above 80% as they were on for about 60 minutes from a full charge at this point and the ones that did connect stated 3 out of 4 battery bars? Are others having sudden issues connecting to their Vive Trackers too?  Anyone have an idea of what may be going on?  Again they were all working perfectly fine for 60 mins tonight and over the past few weeks with no issues like this at all. Thanks for any tips.

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I found the issue.  For some reason, my Logitech MX Master 3 mouse was in some sort of limbo state were the PC you want to control button on the bottom was not showing anything despite being connected.  When you flip this mouse over, the PC number it is connected to (1,2 or 3) lights up but it was not doing this.  When I pressed the button to connect to another PC, they all flashed and it looked like it rebooted itself as it has never behaved this way before.  It normally just cycles between PCs.  Then as soon as I did this, all 8 Vive Trackers connected again and have been fine since.  I did notice Logitech updated the mouse this evening so perhaps this was the source of the issue?  What an odd problem.  Glad I found the solution and I hope others find this post if they are having a similar issue.

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Thanks for posting your solution. For future reference, all of the SteamVR devices including Knuckles/Vive wands operate at ~2.45Ghz Bluetooth. The MX Master 3 is also Bluetooth so what you saw is likely "co-channel interference". Aside from Bluetooth - the other potential source of Co-channel interference is 2.4Ghz Wifi. Using a USB extension solution like the ones that ship with the trackers help prevents co-channel interference. 

@Immersive Matthew Since you're using so many trackers - I'd highly recommend ensuring that you're using 5.0Ghz Wifi in your space and that you're limiting the number of devices broadcasting 2.4Ghz WiFi in your space as possible. If you start having interference issues - disabling 2.4Ghz SSIDs is recommended as a troubleshooting step.

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