[Android Auto General] GPSMapper:
Hi all,

just submitted a ticket to devs (#39606), but would like to share my experience here as well.

I am having troubles to get a stable connection with AA on my HU.

Setup:

- AAWireless box running latest FW

- VW Sharan 2018 running MIB2

- Xiaomi 12 Global running Android 12 and MIUI 13

1. I was unable to make original supplied cable to work at all, not matter what USB mode I was trying. In default and direct modes led was blinking blue and was not connecting at all. In MTP modes it was trying to connect and was loosing connection immediately (blinking blue - blue - green - blinking green - blinking blue and in cycle)

2. With another cable AAW started working in Direct mode, but connection was still unstable and HU was dropping connection every minute or so.

3. After trying another 3 cables I have in my possession, finally I found one which was working relatively stable. Connection works for 5-10 minutes.

However, still, every 5-10 minutes or so AAW box drops connection with HU.

This looks the following: HU drops connection, AAW led continue showing solid blue for another 2 seconds, that it starts blinking green, turns into blue and reconnects)

I have tried also: Enabling USB passthrough mode and switching WiFi to 2.4G mode. No change or improvement, I am still facing regular disconnects at nearly same intervals.

VAG fix was enabled by default.

I have also tried resetting the box and reconfiguring it.

With all the tests and trials I can definitely say that the box is HIGHLY sensitive to the USB cable used, and the supplied one does not work at all in my car.

Also I was surprised by reading this article on support website with recommendation to turn around cable in the AAW box socket (what?!)

When phone is connected directly with a cable to HU, connection is stable (no matter what cable I use)

So with the 3rd cable I've tried the box is working but connection with HU is dropping every 5-10 minutes.

Any ideas on what else I could try?

Yes, I've searched the thread for similar issues and have read through numerous reports on "Xiaomi compatibility" with disconnects reportedly related to mobile network reconnect causing wireless connection dropping as well.

BUT, I have also seen similar reports from other users with Samsung devices (example 1, example 2)

So it might not be really (or solely) Xiaomi dependent issue and the fact that with one cable I am getting disconnects every minute or two and with ANOTHER cable and SAME SETTINGS every 5-10 minutes - does not seem to be explained by "Xiaomi bug"

I am now waiting for an expensive 6A USB cable, will try it out, but I don't understand WHY the box is SO sensitive to the cable I use and if this is a HW/design defect or not?

I am still within 14-days 'any-reason' return window, but maybe there is something else I could try (please do not suggest changing phone or ROM)

UPDATE:

I can confirm that I can reproduce this behavior. So toggling Mobile data Off/on forces AAW to disconnect. I assume this should not happen under normal conditions and this is what developers are referring as "Xiaomi bug"

BUT after another round of testing I am pretty confident, there are also some other issues causing random disconnects and this has nothing to do with data connectivity loss ('xiaomi bug'). I was doing tests in well covered area and car was not moving. Still I was getting random disconnects at random intervals (between 5 and 10 minutes).

So this should not be 'data connection loss' driven disconnects.

Also AAW box led behavior is different between 2 scenarios.

When I toggle mobile data off/on, AAW disconnects and blue led goes off immediately when connection is dropped.

BUT with my random disconnects - led stays solid blue for another 2-3 seconds after disconnect has occurred and only after 2-3 seconds it turns blinking blue and reconnects again.

I have a gut feel that something else is going wrong.

Again, I've seen similar random disconnect reports from Samsung users recently (links above).

BTW, 6A USB Type C cable was of ZERO help. It was not working with the box (was causing the box to reboot on every connection attempt)

UPDATE2:

I have disabled mobile data to run another set of tests in offline mode making sure 'xiaomi bug' not to interfere. And you know what? I have continued facing random disconnects of AAW!