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Two Bluetooth paired Nexus devices won't connect anymore

OP maigre

26th June 2014, 06:19 PM   |  #1  
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I'm working with a Nexus 7 (2013) and a Nexus 4. I've had both devices for quite awhile, the 4 for well over a year and the 7 for a year. Both are rooted and using stock ROMs, 4.4.4.

I have the two devices Bluetooth paired and sometimes connect them. For the most part, over the last year, there have been no problems doing that. Once in awhile, they won't connect, but if I reboot, they will. Now, all of a sudden, I can't get them to connect under any circumstances. They're paired. But they won't connect. They both connect to an external Bluetooth speaker and the phone connects to my car bluetooth. That happens with 100% reliability. But these devices just won't connect with each other. And I need them to for certain work related purposes.

What could have happened?

I've unpaired and repaired them a few times. I've rebooted both devices. Potentially competing Bluetooth devices (like my car and the speaker I mentioned) are turned off. The devices aren't connected to any other Bluetooth devices.

Strangely, someone I work with who's doing the same sort of thing (and whose urgency to make them work together is greater than mine) with the same exact devices as I am is having the exact same problems.

What could be going on? Please let me know if you have any ideas.

Thanks.
29th June 2014, 08:35 PM   |  #2  
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Same exact problem here with my Nexus 4; rooted, stock ROM, no problem paring with Bluetooth, but unable to connect. I just noticed this today when I was trying to connect to my OBD2 device. This has worked since I bought the phone a year ago. I only use one app, and not very often, so I can't pinpoint the exact time the problem started, but I am pretty sure it would be in the time-frame of the 4.4.3 or 4.4.4 update. I also tried rebooting, re-pairing the hardware with the phone, enabling and disabling Bluetooth, etc..
30th June 2014, 12:18 AM   |  #3  
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Quote:
Originally Posted by pjc123

Same exact problem here with my Nexus 4; rooted, stock ROM, no problem paring with Bluetooth, but unable to connect. I just noticed this today when I was trying to connect to my OBD2 device. This has worked since I bought the phone a year ago. I only use one app, and not very often, so I can't pinpoint the exact time the problem started, but I am pretty sure it would be in the time-frame of the 4.4.3 or 4.4.4 update. I also tried rebooting, re-pairing the hardware with the phone, enabling and disabling Bluetooth, etc..

Thanks for the commentary, pjc123. At least someone said something.

I restored one of my Nexus devices to stock 4.4.3, then 4.4.4. Didn't change anything. Maybe I need to take a couple of them back to 4.4.2 or earlier and see what happens. But AFAIK, my friend who has the same problem hasn't ever even updated to those versions of the OS. And it worked fine for him, doing these Bluetooth connections on no less than a weekly basis for a year.

Google's tech support, fwiw, told me that the first thing I needed to do was to update to 4.4.4. Not that I took that as anything other than their reading off a script.

Please let me know if you ever figure anything out with this. I'll report here if I do, too.
Last edited by maigre; 30th June 2014 at 12:39 AM.
30th June 2014, 12:26 AM   |  #4  
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Well, as it turns out it was my fault for not checking the Xprivacy security settings; I am brand new to that app. After wasting a good part of the day, I discovered that the Torque app for my OBD2 reader needs both "Identification (device)" and "Network(addresses)" permissions for the Bluetooth device to show up within the app so it can be connected to. Once I gave those permissions it was back to working OK again.
30th June 2014, 12:42 AM   |  #5  
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Quote:
Originally Posted by pjc123

Well, as it turns out it was my fault for not checking the Xprivacy security settings; I am brand new to that app. After wasting a good part of the day, I discovered that the Torque app for my OBD2 reader needs both "Identification (device)" and "Network(addresses)" permissions for the Bluetooth device to show up within the app so it can be connected to. Once I gave those permissions it was back to working OK again.

Interesting. I temporarily turned XPrivacy off just for that purpose. The app that's failing for me wasn't being protected, anyway, but it doesn't matter. I can't even get to that point, because the devices don't connect, even though they're paired. Furthermore, only one of my devices even has XPrivacy installed. I can't get any two of my, or my friend's, Nexus devices to connect, even though they're all paired. And they all used to.
23rd August 2014, 07:32 PM   |  #6  
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I'm waking up this thread again to see if anyone has any ideas. I just can't connect two Bluetooth devices anymore by using the list of Bluetooth devices in settings on a Nexus device. This prevents an app that's dependent on that from working.

I CAN connect two devices via Bluetooth using ES File Explorer and see the contents of the other device and make file transfers. But the Bluetooth icon remains unlit and the connection isn't made in the settings. Maybe it's a different aspect of Bluetooth. When I close the connection with ES File Explorer, the toast says that the OBEX connection has been discontinued.

Why would I be able to connect two Nexus devices regularly for a year, then not be able to anymore?

I've tried to get Google support on this. Unlike some companies who provide inept support, even laughably so, Google just blows off the notion altogether.
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