Develop Bugs

[Q] *Unofficial* AOKP 4.2.1 Bluetooth Issue

I would post this in the development thread however I too noobian to do so. I am able to pair with a bluetooth device but once I turn bluetooth off, I can't connect to that device anymore. Things I've tried:
- initially connecting to BT device and making a phone call from it (confirming initial pairing was successful)
- deleting paired device and reconnecting with the same results
- leaving my BT on in between using the BT the device, however won't reconnect to paired device.
With stock OS I was able to use the BT device and have it automatically connect, I do like having BT as it comes in handy while driving so finding a solution to this would be nice. Is anyone else having this issue with this rom?

Bluetooth connections problems.

Has anyone encountered issues with connecting with a car bluetooth? My wife phone conntects with no issues.. She can use the cars remotes to make and receive calls.. Mine I have to pick a contact from the phone for it to work, it will not work with the car or my work truck controls.. It seems everytime it ask if my car or truck can access my contacts, I always choose allow, but nothing happens, but it works with the wifes.. This is with the Lollipop update, that we both have...

happened to me I just rebooted my phone and it connected, also check settings for that paired device

Rom-Addict said:
happened to me I just rebooted my phone and it connected, also check settings for that paired device
Click to expand...
Click to collapse
Got one to work, in my truck.. The car it worked for a while, then quit.. I will try it agian to see if it will stcik... Most likely caused by the 5.0 update..

I've noticed a Bluetooth problem that suddenly started in the last week or so. I upgraded to Lollipop when it first hit, and didn't have any problems.
Now, however, after Bluetooth works fine for awhile (I can connect to a Pebble watch, Bluetooth speaker, car Bluetooth, etc) all day long - then all of a sudden it can't connect to ANYTHING. Toggling Bluetooth off\on doesn't fix it.
Restart the phone, then everything works just fine for awhile. Until it doesn't, and I have to restart again.
Anyone else experiencing this pattern?

I've actually had the opposite happen. I have a iSimple bluetooth box in my car. I've never been able to auto connect with either VZW Note2 or 4. The CS rep told me it had to do only with VZW phones and he couldn't help me out. On another forum, another member mentioned he didn't have any issues with his older phone, so I dug out my old HTC Incredible. Sure enough, it would auto connect. Something changed with Lollipop, and now my Note4 will finally auto connect to the iSimple box. I tried using a third party Bluetooth app prior, but it didn't fix the problem.

Finally got the one in the car working as well... Because the wife and I have the same phone, I just simply changed the name of my phone and it works fine..

If your talking about the developer edition one rom update.. YES.. What fixed mine was wiping everything and redoing the one rom lollipop, then twrp, then installing Ricks Rom Lollipop, things have been perfect. I even addressed it in the ricks rom thread the week.

I haven't had any issues connecting devices but since Lollipop, when I am connected to a bluetooth speaker (car, bose, other bluetooth speakers) the audio gets choppy randomly.
I have done some searching and found others (LG g3) who had the exact same issue after updating to Lollipop.
I have tried rebooting, using different music apps, unpairing/pairing, forgetting the device ect and nothing seems to work. Anyone else having this problem after updating to lollipop? Anyone know how to fix it?

Bluetooth Not Connecting - Worked Previously

OK, so I got everything working on my unit back in November. Bluetooth worked fine and connected with my phone and OBD device (OBDLink LX).
Suddenly within the last couple of weeks, it's stopped connecting. I have tried rebooting the radio, unplugging/replugging my bluetooth OBD, unpairing the phone, repairing, etc... Nothing seems to work for more than a few minutes. Sometimes it will work for one trip, but then the next trip it's back to REFUSING to connect to either bluetooth device. Remember - BOTH worked before, and I didn't change anything.
Since it's happening with both my Phone and my OBD device, it appears like it is a fault in the stereo. I really don't want to do a full factory reset as that would entail many hours sitting in the car wasting gas idling while I reinstall/reconfigure EVERYTHING only to not even be sure it won't do this again.
Anybody have any tips on something I can do to fix this? There does not appear to be any kind of "unpair" option in the bluetooth settings on the radio itself. I'm wondering if there's a way I can manually reset just all of the bluetooth settings - blow them away and start over without resetting the whole device.
This is a pretty big deal - one of the #1 reasons I bought this device was for OBD datalogging. If that feature does not work, I will rip it out of my dashboard and ebay it. PERIOD...
Adcice?

Nobody?
I tried changing the bluetooth device name, changing the PIN and re-pairing my devices. They work intermittently, but 90% of the time won't connect, or if they do, they won't stay connected.
This is turning my radio into an expensive piece of garbage...

lotherius said:
I tried changing the bluetooth device name, changing the PIN and re-pairing my devices. They work intermittently, but 90% of the time won't connect, or if they do, they won't stay connected.
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Click to collapse
Try keeping wifi on all the time (even if not actually connected to any network).

themissionimpossible said:
Try keeping wifi on all the time (even if not actually connected to any network).
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Click to collapse
I do have Wifi on all the time. I have an LTE Hotspot I keep in the glovebox of my car that powers up as soon as the car powers on. So there's 100% wifi coverage for my stereo no matter where I'm at.
I can randomly get it to connect, but it won't stay connected. When I'm in the bluetooth menu, the devices will actually disappear from the paired devices list. Both paired and available will go blank just suddenly as the devices drop off. Then they'll reappear on their own. So it appears to be the bluetooth stack is crashing - but I'm not sure why.
It is a KLD RK3188 unit. Running latest MCU (came preloaded, just bought it in November - I haven't put a new MCU) and recent firmware, which is a stock firmware, not MalaySK (MalaySK doesn't support the digital display below the screen on my unit)...

At this point this unit is trash if I can't keep Bluetooth working more than 10% of the time.
Sent from my OnePlus One.

lotherius said:
I can't keep Bluetooth working more than 10% of the time.
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Click to collapse
Some smartphones might show an incompatibility with the radio's BT stack. To be sure try with another smartphone.

I would see if it pairs reliably with just one device at a time. My phone has issues connecting with the HU if I first connect my BT headset to the phone but works fine if I do it after. Also the construction of these seems to be sub-par and it could be the bt device or antenna in yours was not connectec/mounted well and you hit a pothole and now its not attached/broken/loose. It may be worth opening and looking inside for something that broke off or is loose. Finally, I have had (well still have) my factory settings change randomly and have to go in and reset. There are settings in the for BT module and it may be worth looking to see if yours are correct.

I also have problems with mine but I'm running Marshmallow in my OPO. As soon as i go back to Lollipop (CM 12.1) it works again.

stormlabs said:
I also have problems with mine but I'm running Marshmallow in my OPO. As soon as i go back to Lollipop (CM 12.1) it works again.
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Click to collapse
Turns out I think it's the OPO. Mine has issues even with 12.1. I think it's based on Modem version not firmware version. Your modem may have been changed when you went back to 12.1.
For me changing modem versions is something I really want to avoid. I hunted forever for a modem version that didn't constantly drop WiFi and LTE, finally found one, and I think that's when the Bluetooth issues started. Every time I flash a modem to the OPO it becomes a nightmare. That phone really does not want you messing with the firmware which is not what I expected when I bought it.
For now I'm back on my old Nexus 5. No problems. I may just sell the OPO and never stray from Nexus again.
Sent from my Nexus 7 using Tapatalk

Hmmm.
My OPO doesn't connect to the headset but my chinese BT OBD dongle connects fine and works.

I have the same problem with my unit but phone working.Only obd2 adapter some times not connecting.Have you find any solution?

I have a similar issue with the Pixel XL.
Previous I was on a Nexus 5 Bluetooth worked perfectly every time without fail, could make calls, listen to music and sync address book no issue.
Now since moving to the Pixel XL I have an issue connecting to the head unit. The head unit shows as a connected device, but then flashes green then grey, green, grey showing connected, disconnected... I can still stream music from my phone over Bluetooth, but voice is not achievable.
Like suggested it's likely to be the BT stack in the handset rather than the head unit as works fine with Nexus 5. Highly frustrating and likely no fix unless it can be patched by software update

I'm also having the same problem as you noodlemctwoodle on a Nexus 6P with 7.1 developer preview.
I've un-enrolled from the beta program this morning, waiting for the ota to come down, as soon as it does will re-test and let you know if it's working, as I suspect it is a problem with the bluetooth stack in 7.1

MTCD MLT (Xtrons TD618AS) Bluetooth and OBD Reader
I have had issues with the Bluetooth on the MTCD MLT V1.76_1 (Xtrons TD618AS).
I found a work around which allows me to use the OBD reader successfully. I downloaded an Android Bluetooth App and toggled off the Bluetooth. Once the Bluetooth was toggled off I was able to access the OBD reader by using the "Piston" OBD app. I tapped on the car picture and waited for the app to think about things. Once the app finished thinking I was able to start capturing the live OBD data by pressing the play picture. I am only speculating, but I feel as though perhaps the firmware engineers goofed. This is even the OBD reader that Xtrons promoted as compatible with the TD618AS stereo I bought with it at the same time. Not to mention that I continually lose FM radio even though the stereo was professionally installed and no wires were cut. I was very excited, and now only depressed.

mr.hackerly said:
I have had issues with the Bluetooth on the MTCD MLT V1.76_1 (Xtrons TD618AS).
I found a work around which allows me to use the OBD reader successfully. I downloaded an Android Bluetooth App and toggled off the Bluetooth.
Click to expand...
Click to collapse
Which Bluetooth app did you download?

HTC M8 OTA 6.0, now bluetooth disconnects, beeps then connects back...

Anyone else having this issue? Jawbone HD headset.

i get a similar issue with my fm transmitter after updating to marshmallow, tonight on my way home from work i started to play some music from the phone through the stereo in my van and i didn't have any problems but when i leave it connected so that i can answer calls hands free that is when i get the disconnecting issues. i noticed that i had the aggressive doze setting switched on in greenify so i've turned this off now and i'll see if that makes any difference

switching off the aggressive doze setting didn't work so i'm back to square one, reading online this seems to be a common issue on 6.0 on other phones hopefully google have sorted it on 6.0.1 and htc give us an ota update to this version

I can stop it from happening by turning off wifi, not ideal, but works.

thanks for the suggestion windozgeek i'll give it a try tomorrow

I had issues with the my car bluetooth. Connecting, disconnecting constantly on the way to work. Also text messages would not import. Didn't have any trouble with Lollipop. Oh, both ROMs were completely stock, no root or anything.
So I loaded TWRP and then loaded Bliss ROM, and everything is working great again. Guess I won't be going back.

Same here. My HTC M8 will connect to my car stereo and start streaming music immediately when I start the vehicle. But about 1 minute into it, it will disconnect, reconnect, disconnect, then reconnect. One out of every 4 times the bluetooth stack in Android will crash completely and not come back without a reset. Wondering if this is a driver issue in the modem firmware. Can possibly be verified by rolling back to the 5.0 modem and seeing if the problem persists.

Bluetooth pairing problems

Hello, I am getting weird problem when using bluetooth devices with my HTC 10 (stock rom)
I bought a bluetooth device with aux-in for my car radio.. That way I only enable BT on my phone and devices connect without problems.
But I also have a small Bluetooth speaker I use when I renovate the apartment (JBL GO).
The problem is when I paired car bluetooth device so it can connect automatically and after that also connected bluetooth speaker this one does not want to connect. If I unpair car bluetooth device, the speaker connect normally.. also if speaker connect and I come down to my car and try to pair to car bluetooth device, it doesnt want to connect/pair... Again if I remove BT speaker from paired devices, car bluetooth device connect normally...
Why is that, anyone knows a solution? Why can I have only one BT device paired with my phone?
Thank you for answers

i have this problem too.

Had this problem myself.
Updated to the latest firmware, rom and kernel.
Currently using cleanslate.
Turn on the BT device, make sure no other BT devices are in the near radius which may confuse it, no wireless devices (I know hard in this day and age)
Turn on BT on your phone, hold it up clearly (not laying down) close all apps, and open the Bluetooth menu.
Click the Bluetooth device to make sure it's ready to pair. Then scan on the phone.
Should start picking it up.
Repeating this and turning the BT device on and off periodically, allowing for several attempts at a time before switching off..
Even really it'll work, perhaps a different rom or kernel combination may help..
I have had this problem, once connected it'll always work and work well. It's odd

Same issue somewhat..I really want to keep this device...i dooooont want to go back to the s7. But on the S7, i could have my Gear S2, Sync and LG Tone all paired at the same time...If i got a call they would all ring and i could answer on whatever device...now if i have the LG on, sync wont find the device. or the phone wont allow for sync to use the Phone, because the S2 is using that feature...what gives? just me?

CrazyCypher said:
Hello, I am getting weird problem when using bluetooth devices with my HTC 10 (stock rom)
I bought a bluetooth device with aux-in for my car radio.. That way I only enable BT on my phone and devices connect without problems.
But I also have a small Bluetooth speaker I use when I renovate the apartment (JBL GO).
The problem is when I paired car bluetooth device so it can connect automatically and after that also connected bluetooth speaker this one does not want to connect. If I unpair car bluetooth device, the speaker connect normally.. also if speaker connect and I come down to my car and try to pair to car bluetooth device, it doesnt want to connect/pair... Again if I remove BT speaker from paired devices, car bluetooth device connect normally...
Why is that, anyone knows a solution? Why can I have only one BT device paired with my phone?
Thank you for answers
Click to expand...
Click to collapse
Do you have another device to try it with? i have had a similar problem, but its just my terrible bluetooth rockford deck causing me grief, and an ebay pill. But it did it with a lg g3 and xperia phone as well. so i chalked it to that

Seems like HTC only allows one bluetooth profile at a time. Like it will only allow one device to use the phone profile or one device use the media profile.
I have to turn off my tone for Sync to connect. Sucks.

I've had this problem since purchasing the HTC 10 about a month ago. My Bluetooth earphones work without issue, but I've been unable to connect to my car or portable speakers (pairs but never connects).
After reading this thread, I unpaired the earphones, cleared all devices, and I was finally able to connect to my portable speaker. So glad I found this topic.
Still, I'm hoping for a fix. I don't want to bother with pairing and unpairing just to connect to a different Bluetooth device.

Similar problem
Hello !
I am having a similar issue!
I have been trying to register and pair my phone with my car's Bluetooth.
Every time I try to pair with my car an error message pops up saying "couldn't pair with Hands Free System because of an incorrect PIN or passkey" except it never even prompted me to enter the passkey...
Things I have already tried:
Resetting network settings
rebooting phone
Factory reset phone
Also , I do not have any other devices paired with my phone.
Any suggestions??

AmandaLS1991 said:
Hello !
I am having a similar issue!
I have been trying to register and pair my phone with my car's Bluetooth.
Every time I try to pair with my car an error message pops up saying "couldn't pair with Hands Free System because of an incorrect PIN or passkey" except it never even prompted me to enter the passkey...
Things I have already tried:
Resetting network settings
rebooting phone
Factory reset phone
Also , I do not have any other devices paired with my phone.
Any suggestions??
Click to expand...
Click to collapse
Had exactly the same problem htc10 would not pair with car bt. changed my passkey on car to 0000 still a valid code and phone paired straight away It was driving me insane trying to make it work. Worth a punt if you can change passkey

hamish707 said:
Had exactly the same problem htc10 would not pair with car bt. changed my passkey on car to 0000 still a valid code and phone paired straight away It was driving me insane trying to make it work. Worth a punt if you can change passkey
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Click to collapse
Thank you, I will give that a shot!