Unstable Bluetooth Connection issue PX5 MTCD/MTCE Android 9

[dingmel]

Hey guys.

I'm on a Xtrons TE103AP which is basically a PX5 MTCD/MTCE unit. I was previously on stock Android 8.0, had no issues with OBD Bluetooth pairing and running ECU based programs off of it. Moved to Malaysk's 8.0, no issues as well. MCU back then was the MTCD the unit came with, GS 2.71 if i remember correctly
I took the plunge and moved to Android 9, first with Hal9k's v4.0, then Stock Android 9 for GS units (the most recent release). I tried these 2 combinations with different MCU's from GS 3.00 right up to GS 3.44 (latest). While i'm able to pair with my BT OBD2 Adapter with no issues, i'm unable to maintain a connection. The bluetooth OBD icon on the task bar connects and randomly disconnects causing programs (torque and hybrid asst etc) to drop connections with the ECU.
The behavior is constant. I've tried changing selecting different bt drivers from the factory menu, to no avail.

Anyone can shed some insight?

Thanks!

 

[marchnz]

Hey guys.

I'm on a Xtrons TE103AP which is basically a PX5 MTCD/MTCE unit. I was previously on stock Android 8.0, had no issues with OBD Bluetooth pairing and running ECU based programs off of it. Moved to Malaysk's 8.0, no issues as well. MCU back then was the MTCD the unit came with, GS 2.71 if i remember correctly
I took the plunge and moved to Android 9, first with Hal9k's v4.0, then Stock Android 9 for GS units (the most recent release). I tried these 2 combinations with different MCU's from GS 3.00 right up to GS 3.44 (latest). While i'm able to pair with my BT OBD2 Adapter with no issues, i'm unable to maintain a connection. The bluetooth OBD icon on the task bar connects and randomly disconnects causing programs (torque and hybrid asst etc) to drop connections with the ECU.
The behavior is constant. I've tried changing selecting different bt drivers from the factory menu, to no avail.

Anyone can shed some insight?

Thanks!

What BT type? Is it still OK on Android 8?

 

[dingmel]

What BT type? Is it still OK on Android 8?

Thanks for replying!

It was on WQ_BC6 by default. That was on android 8 (stock) and on Malaysk. I tried reflashing back to Android 8, but on the new MTCE MCU's. Problem persists.
Could it be the MCU causing issues? I've tried almost all the GS MTCE MCU's and they all produce the same issue.
Other Bluetooth functions work fine. A2DP and phone sync is perfect.

 

[marchnz]

Thanks for replying!

It was on WQ_BC6 by default. That was on android 8 (stock) and on Malaysk. I tried reflashing back to Android 8, but on the new MTCE MCU's. Problem persists.
Could it be the MCU causing issues? I've tried almost all the GS MTCE MCU's and they all produce the same issue.
Other Bluetooth functions work fine. A2DP and phone sync is perfect.

How have you tested your OBD adapter to confirm ithe adapter isn't the issue? Is it a genuine OBD adapter or knockoff?

 

[dingmel]

How have you tested your OBD adapter to confirm ithe adapter isn't the issue? Is it a genuine OBD adapter or knockoff?

Already tested. Its a rebadged ELM from Xtrons. They charged a premium for it, moreover it works fine on my android tablet. No connection drops or the sort. The exact same OBD was working fine with Android 8 as well prior.

A new update. I just realized that while i'm able to pair my phone and stream A2DP, and sync contacts with my phone, incoming calls route no audio or voice. Incoming calls trigger a prompt and i'm able to answer, but there's no sound or pickup from the microphone. weird....

I've tried selecting BC8 and BC6 in the factory settings... not quite sure what i'm dealing with. I'm on GS3.30bd, the BD modded MCU. Will see if an unmodded MCU fixes the voice issue.

 

[dingmel]

@marchnz I flashed an unmodded GS 3.44 MCU and bluetooth audio worked properly. the OBD connection was still intermittently dropping. I then moved back a step to GS 3.40bd (soundpatched) and had no issues as well with bluetooth audio. I suppose the bluetooth issue was from the modded 3.30 MCU.
The Bluetooth OBD connection drop still hasn't been resolved however.
Any suggestions?