[MTCD/E] [PX5] BT Search and connection issues with device name and pin

[PekeMM]

Recently some users including me are having issues with BT Connection, device search, setting device name and making changes persistent.

BT MODULES THAT IT WAS TEST ON:
SD-968 - [HA] [MCU MTCE 2.75] Firmware 20180201 and few earlier = WORKS
MD725 - [??] [MCU ???] Oreo Firmware = DO NOT WORK (According to feedback) LogCat needed to see if Firmware communicate with BT Module at all.

METHOD 1 (SHORTER):
1. Force Stop BT app
2. Clear DATA and CACHE for BT app

METHOD 2 (LONGER):
Here are the steps I've done to make it work.
1. Boot device (restart if it was not in deep sleep)
2. Directly go to system BT settings (drop notification and tap on BT)
3. Set Device name and PIN
4. Press refresh
5. Go to Home Screen (Home Button)
6. Open BT App -> Configuration
7. Name and PIN should be entered now
8. Disable/enable Auto Connect and exit app
9. reenter app and configuration to enable Auto connect
10. Make sure that all previous BT profiles for HU are deleted on phone and that phone is visible for all devices (usually when BT configuration is open device is visible)
11. Try to search for devices. It should fail (it failed for me)
12. Go to factory settings
13. Change BT Device even it is wrong one (I have SD-968 I changed to MD725)
14. Tap Apply -> Exit -> CANCEL on reboot prompt (without doing step 13 there will be no scheduled restart)
15. Reenter Factory settings and set correct BT Module (I have SET SD-968) Tap Apply -> Exit -> and Confirm REBOOT
16. After Reboot Go to BT App and try to search for phone it should be found (make sure it is visible like in step 10)
17. If all is OK you should see the phone and you should be able to use it normally (it worked for me)

Attached pictures of some steps for METHOD 2.

NOTE: I'm ATM at HA 6.0.1 Firmware from 20180201 and issue happened after upgrade. Also from what I see Users have same issue with and after Oreo update. Hope I helped

 

[julien_blanche]

Thanks for the info. Have you tried this method also for oreo rom as well ?

 

[Phycopat]

A step that worked for me was to clear data and cache for bluetooth app..

 

[PekeMM]

Thanks for the info. Have you tried this method also for oreo rom as well ?

Haven't updated to Oreo yet.

A step that worked for me was to clear data and cache for bluetooth app..

Good point it didn't worked for me but, it can also help. Added to main post.

 

[jdisco1]

You can trigger a reboot with "hctreboot" in factory settings. Does that work instead of doing steps 12-15?

I definitely have the BT issue. I have an Xtrons(GS) MTCD/E PX5 Oreo and an Xtrons brand OBDII. They won't talk or disconnect. I'll try this tomorrow morn and report back.

 

[Phycopat]

You can trigger a reboot with "hctreboot" in factory settings. Does that work instead of doing steps 12-15?

I definitely have the BT issue. I have an Xtrons(GS) MTCD/E PX5 Oreo and an Xtrons brand OBDII. They won't talk or disconnect. I'll try this tomorrow morn and report back.

I have same GS MTCE 2.75 PX5 OREO but an old OBD2, give HU same password as OBD2 adapter..

 

[PekeMM]

You can trigger a reboot with "hctreboot" in factory settings. Does that work instead of doing steps 12-15?

Point of 12-15 is that HU re init Module itself along with software. Not sure if it works that way on MTCD/E but usually it works on modular systems.

 

[julien_blanche]

Tried with PX5 oreo installed with no luck. Both methods are not working for me.

 

[warata]

Haven't updated to Oreo yet.

What???(I thought that this was a trick for oreo)

In my unit BT(MD725) works without any tricks for MM.
I tried your trick with 2 kinds of oreoROM(HA and GS) but BT did not work.

Thanks anyway

 

[PekeMM]

I'm sorry, but as I wrote I have SD-968 BT module not MD725. I'll update main thread with so far know to work devices.

 

[JonatanP]

Any news?

 

[PekeMM]

Any news?

Not that I know, I'll be back from Trip on Sunday, so I hope I'll finally finish the tests and upgrade to Oreo in April.

 

[JonatanP]

seems to be the same

The solution is to go back to android 6, the problem is that it is not as fluid in my case as android 8.

 

[soyoscar]

Hi, same problem here....

I can not use my ODB2 connector on my Android 8 radio either.

Is there an adapter that works?

Is there a trick to make it work?

Greetings and thank you!!

 

[imran0487]

Hi..any update on how to get the bluetooth working on android 8..

Mtcd ksp px5

 

[imran0487]

What???(I thought that this was a trick for oreo)

In my unit BT(MD725) works without any tricks for MM.
I tried your trick with 2 kinds of oreoROM(HA and GS) but BT did not work.

Thanks anyway

if you still have android 8 installed, try going to factory setting and change the BT Device even it is wrong one (anything other then MD725) tap apply and exit and reboot.
after reboot change the BT device back to the original one (MD725) tap apply and exit and reboot.
after reboot go to the system BT and try to search if the phone name appears let me know.

i still didn't try the above method on android 8, but if anyone with MD725 module is still using android 8 please try and update us.

thanks

 

[macoloco]

i was having problem with bt too...

here you can read my post https://xdaforums.com/showpost.php?p=77525417&postcount=791

now i have Oreo Rom in a px5 board (32+4) with MD725 BT module working well

 

[bjt2]

i was having problem with bt too...

here you can read my post https://xdaforums.com/showpost.php?p=77525417&postcount=791

now i have Oreo Rom in a px5 board (32+4) with MD725 BT module working well

Thanks, you said in that thread ".i have found a directory where all manufactures update.zip where listed
Go there , pickup last LM version" could you say where this directory is? Once there what do you do with that file?

 

[macoloco]

Thanks, you said in that thread ".i have found a directory where all manufactures update.zip where listed
Go there , pickup last LM version" could you say where this directory is? Once there what do you do with that file?

i wrote all my procedure here
https://xdaforums.com/showpost.php?p=77525417&postcount=791
and here
https://xdaforums.com/showpost.php?p=77538182&postcount=796

 

[pixel1]

Dasaita MMCNP - BT connection problem

Hi, I have Dasaita HA2106-V840-8 a problem with Bluetooth connectivity. First time I managed to connect my phone to Dasaita MMCP (car_kit), but after a few days the devices failed to connect. I guess my device has embedded SD968 BT chip, in accordance with the description.
When I enter the name of the device and new PIN in BT settings, and then turn on finding the device, they are not visible to each other. I tried this other day too, but when I turned MMCP, entered settings was gone (not memorized). No name, no PIN, but also there is no connection. Search doesn't have results. At the end I tried to unpair devices and pair them again, but I get a message on my phone "Unable to communicate with CAR_KIT".
When I entered in settings for BT (settings/car/factory setting/application-choose...) it was set to WQ_BC6. And then I tried to set up SD_BC6, reboot, search BT, nothing was found again. Then I returned to WQ_BC6, reboot, search BT, without success. In the end, I tried to set up SD968, but it's not worth it anyway, MMCP does not see a mobile phone. I also tried several phone models without success. I also went to the BT application and clear data and cache, but always the same thing - BT devices do not see each other. I'm not even sure BT is ON because it doesn't have a special slider to move On/Off.

What should I do? Please help me!