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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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?
Hi All,
Just getting to grips with my KLD HU. I've upgraded to the latest MCU (2.83) and Malaysks FUSE ROM.
I find that if I am on the phone when I turn on the HU the bluetooth connects during the boot sequence but the sound output isn't turned on until android has started up. I thought that if I could turn off the BT when the HU powers down and turn it back on once android had booted then I wouldn't have this problem. However I don't know if this would work since its an external BT device.
Does anyone have any thoughts on this?
Thanks
Andy
Hello
I have a problem with bluetooth in my Lenovo P2, android 7.0
With a connected car radio and dialing, the phone only connects to the car at the time of the call, not during the dialing, which causes a 3-4 second delay. on android 6.0 everything was OK. how to solve the problem?
I don't face this problem on stock unrooted
On android 7.0?
I've tried Android 6.0, 7.0 and 8.0. I never had problems with my Bluetooth. Not with speakers or my Car Audio.
What can I do??
Rebooting your device is the first thing you should try.
Try pairing BT once again.
Try with some other device/vehicle.
If nothing works then try a factory reset.
Rebooting your device is the first thing you should try. I did it
Try pairing BT once again. I did it
Try with some other device/vehicle.: Haven't got unfortunately
If nothing works then try a factory reset. I think I did it, but I'm not sure
Nobody has the same problem?
Hello every one.
I have a problem with my HU its a HIPZO MTCE octa core android 8.0.0.
The problem is that the radio application does not always work. Sometimes it works normally but most of the time the application starts but no sound is heard or tuned to FM or AM stations.
When it is working incorrectly it will not be corrected even if I turn off and then turn on the device or engine of the car. The next day it may work and it may not, 1 to 10 work OK.
When it is working properly, there is no malfunction until I switch off the head unit or the car.
Can anyone help please?
Hi guys, hoping you can assist...I've had an Xtrons unit installed in my Audi TT for about a year now. One day as I was driving, I was listening to music from my phone via A2DP. Midway I switched my phone to my bluetooth headphones so I could listen on those in one ear. It seems the phone stayed paired to the head unit but the music was coming through the earpiece fine, no sound off the headunit.
Ever since that day, I've had no sound coming out of the head unit at all. I've done a factory reset, unpaired any bluetooth devices, and just tried listening to radio, but no sound comes out at all. I thought maybe the amp fuse was blown so checked that and it isnt that. I've pulled the unit forward and no cables are loose
I've contacted Xtrons to try and see if there's a new firmware in the hope that will fix it. My current build is shown below.
px5-userdebug 8.0.0 OPR5.170623.007 eng.hct.20181206.171300 test-keys
Has anyone else experienced this? I'm hoping its a software issue and something didnt blow inside the unit itself. Everything else works fine, just no sound
Here you are a complete repository for mtcd units.
Select px5 and android 8 (oreo). Select any manufacturer (all rom are compatible)
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disk.yandex.ru
Perhaps you need to upgrade your mcu as well.
Check on the repository or on xda forum for your specific manufacturer mcu upgrade