Forcing Bluetooth Profiles? - G1 Q&A, Help & Troubleshooting

Hello,
I have an ongoing annoyance with my G1, and was wondering if anyone knew a workaround. I have a Motorola S705 bluetooth device. It's basically a little rechargeable dongle that lets me use regular headphones and walk around. It also has a built-in mic so it can work for accepting phone calls, which is retarded because it stays clipped to my belt.
I really only want it to ever take over media-playing functions and nothing else. I have a rooted G1 running Cyanogen's latest. Is there a config file or something I can edit and force the phone to never ever ever (ever) use the phone-headset bluetooth profile and only connect via the stereo media profile?
When I set it to only use the media profile via the GUI, it obeys these settings for a little while, but for no apparent reason it will occasionally revert back to defaulting to the phone profile when connected, and I have to go back in and uncheck the phone box, check the media box, reconnect, etc.
Thanks!

Alternatively, since I have no desire to use a bluetooth headset, is there a way to just disable that profile entirely?

Related

Autoconnect A2DP when in range?

Hey Guys!
Is there a way to tell WM6 to automatically route Audio through A2DP as soon as a paired device supporting the profile is connected?
Clarification:
When using a Hands-Free-Headsetfor telephony you can pair it once, then turn it off, after that it is automatically connected to the phone as soon as you turn it on again.
In contrast to that a Bluetooth Stereo headset is not automatically connected, you have to manually activate it in Bluetooth Settings first before you can listen to music through it.
Especially with my car stereo used as "A2DP Headset" (which loses power every time the ignition is turned off) this can get highly annoying.
Is there a way to tell Windows to automatically "use" A2DP-Peripherals when available?
Try A2DP Toggle: http://www.teksoftco.com/index.php?section=freeware
The Today-plugin migt reconnect automatically, but it has a memory-leak...
To easily manually reconnect, you can create a shortcut to the exe:
\Program Files\Teksoft\A2DPToggle\A2DP.exe
Then you can put that program on your today screen easily.
And if you want a nice icon with that shortcut, you can change the shortcut file to:
53#"\Program Files\Teksoft\A2DPToggle\A2DP.exe" "-a2dp:1"?\Program Files\Teksoft\A2DPToggle\settings.exe,-0
downloadtest82 said:
Hey Guys!
Is there a way to tell WM6 to automatically route Audio through A2DP as soon as a paired device supporting the profile is connected?
Clarification:
When using a Hands-Free-Headsetfor telephony you can pair it once, then turn it off, after that it is automatically connected to the phone as soon as you turn it on again.
In contrast to that a Bluetooth Stereo headset is not automatically connected, you have to manually activate it in Bluetooth Settings first before you can listen to music through it.
Especially with my car stereo used as "A2DP Headset" (which loses power every time the ignition is turned off) this can get highly annoying.
Is there a way to tell Windows to automatically "use" A2DP-Peripherals when available?
Click to expand...
Click to collapse
Yep. The WM bluetooth stack sucks. It works better with some stereos though. I tried it out in the store with I believe a Pioneer (with bluetooth 2.0) and it was perfect. Turned it on and a2dp connects. Switch to another input and a2dp disconnects. Switch back to bluetooth audio and it connects. It was flawless. I ended up ordering the kenwood built in bluetooth unit (bluetooth v1.2) and it is terrible. I must manually toggle the bluetooth connection (I use a program that I wrote to do so, kinda similar to the above the above poster posted). Also, sometimes after a call comes in it wont reconnect. Sometimes i must power off then on the headunit a few times. Wasnt this thing supposed to make things easier?! A real shame because I love everyting else about the kenwood head unit. It works better with some ROMs on my phone (this is with a tilt; xperia on the way ).
Yeah, A2DP Toggle works for me as well, It's just dumb that this phone cant just do that itself. My old W880i could! I'm using a Sony DR-BT21G headset
JKingDev said:
A real shame because I love everyting else about the kenwood head unit. It works better with some ROMs on my phone (this is with a tilt; xperia on the way ).
Click to expand...
Click to collapse
A story to learn before you you buy the head-unit I spent almost an hour at Fry's to try many units w/ my Tilt as well (Sony, Pioneer, Kenwood, JVC ...etc) and ordered online w/ the JVC unit. Excellent sound (compare to other model) but disconnect after phone call issue exist. I believe it's HTC fault since my Eten M600 (MS BT stack) and Asus P525 (Widcomm) doesn't have this issue (but others....). But I got to admitted HTC one do have the best sound quality.
BTW, my JVC BT-1 will auto connect my X1/Tilt when I start my car and I think it serve my purpose.
Solution
wensing said:
Try A2DP Toggle: http://www.teksoftco.com/index.php?section=freeware
The Today-plugin migt reconnect automatically, but it has a memory-leak...
To easily manually reconnect, you can create a shortcut to the exe:
\Program Files\Teksoft\A2DPToggle\A2DP.exe
Then you can put that program on your today screen easily.
And if you want a nice icon with that shortcut, you can change the shortcut file to:
53#"\Program Files\Teksoft\A2DPToggle\A2DP.exe" "-a2dp:1"?\Program Files\Teksoft\A2DPToggle\settings.exe,-0
Click to expand...
Click to collapse
I have created an application wich runs the commandline setting automaticly, so you never have to do anything again it connects automaticly. You can find it here: http://forum.xda-developers.com/showthread.php?t=502549

Connecting to Bluetooth automatically starts music player?

I've recently brought a new car stereo and bluetooth gateway - both of which connect to my G1 fine, however...
When I connect them (e.g. when they switch on, as both connect automatically), it starts the music player on my phone playing a random track!
This is becoming very annoying, as I typically listen to Podcasts, not music. So my question...
Is there anyway to stop this happening?
And/or automatically start BeyondPod to be the app that launches on a bluetooth connection?
Note: Am running Cyan 4.0.2 on G1, with JG-Cyan theme (default music player, with slightly different skin).
I am wondering if there is a way to stop this also. I have a Ford with the Sync system and when I call someone there will be music playing in the background until I shut off the music player. lol.
Mine is straight with the JVC KW-NX7000BT head unit. What are your guys spec? Are you rooted? What rom? And do you have the newest radio?
supremeteam256 said:
Mine is straight with the JVC KW-NX7000BT head unit. What are your guys spec? Are you rooted? What rom? And do you have the newest radio?
Click to expand...
Click to collapse
Not sure what you mean by 'Mine is straight'.
My head unit is a Clarion FB289, connecting to a rooted G1 with Cyan 4.02 Rom (with JG-Cyan Theme). As far as I'm aware I have the latest radio.
As the problem/action happens with two different BT devices, gotta be something to do with the phone/ROM (?)
smccaldin said:
Not sure what you mean by 'Mine is straight'.
My head unit is a Clarion FB289, connecting to a rooted G1 with Cyan 4.02 Rom (with JG-Cyan Theme). As far as I'm aware I have the latest radio.
As the problem/action happens with two different BT devices, gotta be something to do with the phone/ROM (?)
Click to expand...
Click to collapse
When I said mine is straight just meaning mine doesn't act in the way you guys are having. Go to your settings on your phone and go to about phone and look what your baseband says. Most likely you prolly do have the newest radio but you just wanna check. Without having the newest radio you can run into BT problems.
It has done it not rooted, rooted with JF 1.5, cyan's 3.6.8.1 through 4.02, Hard and the 1.33.2005 SPL, always the latest Radio.
I guess it is the BT device.
New Development
I'm mainly using BeyondPod to listen to podcasts (go figure...).
But was playing with the settings following the last update, I realised that the 'enable headset buttons' wasn't 'on'.
Since switching it on, when I connect to bluetooth devices, it starts up BeyondPod, rather than the music player...
... better for me, would be nice if nothing happened!
+2 year old thread - same problem. Still. It's kinda funny, but then again it's really, really frustrating.
On the same token, cars usually request access to the contact list - and I've found that the phone allows this even if I don't explicitly allow it. If I happen to look at the phone right when the car system makes this request, I can see the notification and I get to "Allow" or "Cancel". But if I don't do anything, it automatically allows it. What gives?
This has to be a flaw of Android. It's a HUGE security risk too. I use rental cars frequently when I travel and I really don't want to give all my contact data to a car that has a new driver every other day or so.
I have a Motorola Atrix btw, not an HTC Dream. Maybe a mod could move this to a general Android forum.
smccaldin said:
I've recently brought a new car stereo and bluetooth gateway - both of which connect to my G1 fine, however...
When I connect them (e.g. when they switch on, as both connect automatically), it starts the music player on my phone playing a random track!
This is becoming very annoying, as I typically listen to Podcasts, not music. So my question...
Is there anyway to stop this happening?
And/or automatically start BeyondPod to be the app that launches on a bluetooth connection?
Note: Am running Cyan 4.0.2 on G1, with JG-Cyan theme (default music player, with slightly different skin).
Click to expand...
Click to collapse
If this does not work try the solution below. I just went out and trouble shooted with my radio. Seems like when I make the pair from the phone to radio I have the problem. When I make the pair from the radio to the phone its a non issue. The first phone I paired was my Galaxy note I went into the radio settings and searched for my phone; paired the phone and it maintains the connection perfect. When I switch between cd, aux and BT audio the phone stays connected. Calls come in voice switches to speaker and then after call if music is playing it resumes via what ever method it was playing pre call. ie CD, FM/AM or media app (pandora).
On my GS2 I tried making the connection from the phone first. ie making the phone seek the radio's BT signal. This is where I had problems. The stock music app would start after every call. ie send or recieve. I also got the annoying music starting everytime the device reconnected. ie the phone would dissconect everytime I switched the radio's input method between cd, aux or bt.
Soulution 1) Make the pair from your head unit and not the phone. Temporairly set your phone to visible and make the pair that way.
Solution 2) Headset block. Stops unwanted headset controls. In this case play on connect. Just remember to open app and hit the toggle button to on on your first use. found in the Play Store.
Solution 3) More of a work around. Media Button Router : App that lets you select what app you want to auto open on BT audio connect, or you can have it just display choices and cancel them out when you turn on the screen.
Both work well with the first being the better of the 2, but the second addresses you secondary criteria "or automatically start BeyondPod to be the app that launches on a bluetooth connection".
I think its solved now my this thread RIP. It frustrated the heck out me, but nowhere actually had a solution. Hope it does not come back in 4.0.
hi
Well Dec 2012 and I am still struggling with this...
I have a Subaru and a Subaru Factory radio with BT streaming. I cannot do "solution 1" as the car stereo does not have option to search for available devices.
The problem I have is not only the above but more...
0. I have the XXLSJ based Neatrom (Jelly Bean) on my galaxy S2
1. It automatically launches either "Power Amp" or the default JB music player. (earlier it used to do Power Amp, but lately it is doing the JB player)
2. I have switched off bluetooth controls in PowerAmp.
3. There is no option for switching off bluetooth in the default JB music player.
After I start the car, I usually switch on "google listen" and the try to play the podcast I want to hear,
next it starts playing and in a secon or two gets muted, (as some music app tries to autolaunch I guess)
then I do vol+ or vol- on the car stero and it starts playing the podcast, and then the phone freezes (hence it mutes again)
and I get a message "poweramp force closed" at this time if I am luck the bluetooth connection stays or sometimes
it resets, and then I have to go through the procedure again!
If I am lucky the bluetooth stays and I am able to listen to the podcast...
If I use the seek+ or seek- buttons on the car I can switch podcasts which is fine, but the Meta-tags shown on the screen are
not of the podcasts, they are still comming from poweramp. If I hit vol+ and vol- on the PHONE (not the car) then the meta-tags
switch to the next or previous song. Note that as the metatags switch I am still listening to 'google listen' and not poweramp.
I would have liked this to work cleanly.. but well...
G

A2DP Bluetooth Audio Streaming Skipping - Findings

A number of people have mentioned having issues with A2DP streaming on the Nexus.
I just found out something interesting... I've been getting annoying skips in music when playing audio to my car stereo, so after experimenting I've found:-
Open bluetooth settings, select headunit, enter pin, allow phonebook access and for the duration of that connection I get perfect audio.
Turn off either the headunit or phone, or both and allow them to connect again, then audio skips...
Open bluetooth settings, select headunit, unpair, select headunit, enter pin, allow phonebook access and for the duration of that connection, once again I get perfect audio.
The only thing I can think of is that the good connection is initiated by the N1 and the bad one by the headunit when it connects to the N1 at startup. Maybe capability negotiation problem? Maybe N1 selects a lower bitrate when it connects than the headunit does when it connects, any ideas? Is it possible to tweak the N1 to restrict the connection parameters?
- Anthony
I use a HT820 by Motorola and do not have any issues with skipping.
Started stock, then CM, now froyo. no issues on any of these roms.
That's great, but whilst bluetooth is a standard, some manufacturers get things wrong, and motorola may well have handled this better, this handsfree kit worked with:-
Hermes,
TYTN II
Touch Pro,
Sony Xperia,
Diamond2.
The kit within my headunit is built by parrot, so no small fish in the bluetooth pond.... It has a little menu with a list of models of phone with "funny" (non-standard) bluetooth implementations so that it can implement workarounds.
To top it off, others, with different handsfree kits have similar issues.
So, back to what I was saying...
I've just confirmed that it doesn't matter which end initiates the connection, if the phone was paired previously it skips, if you unpair and re-pair (during pairing the phone is connected as part of that process) for the duration of that connection the sound is flawless.
It must be using different connection parameters on that first connection, but I can't even see _any_ information about the connections, like bitrate/bitpool / sample rate etc.
Is there any way I can get the connection information for current bluetooth connections?
Does anyone know the way around the AOSP code enough to see if there could be any difference in the pairing connection to the normal connections?
I bet it really is that it uses "safe" values during the initial connection.
- Anthony
http://code.google.com/p/android/is...t&colspec=ID Type Status Owner Summary Sta rs
http://forum.xda-developers.com/archive/index.php/t-622231.html
All i found on it, hope it helped. Otherwise, good luck finding out a solution.
Devastatin said:
I use a HT820 by Motorola and do not have any issues with skipping.
Started stock, then CM, now froyo. no issues on any of these roms.
Click to expand...
Click to collapse
I have the same headphones and only notice skipping when I'm walking fast, with my phone in my pocket...or I turn my head away from the phone. But that's all my doing, not the phone.

[Q] Bluetooth Connection Issue (Redux)

Hey All,
I've done a quick and dirty search for this problem, but I haven't found anything that's exactly the same.
I have an XT1060, Dev Ed, on KK 4.4.4, and I'm just wondering, am I the only one who cannot get my bluetooth radio to hook up to paired devices easily?
The problem is, I always have to ask to connect manually; this is a bit of a pain, especially after turning off my car, say, for a few seconds. Oh, it'll connect, but sometimes it takes 10-15 tries before that connection is made, and even then, it's often after I have to disconnect then attempt to reconnect a few times because it doesn't connect both the phone and media modes.
I have done the unpair/re-pair thing a couple of times, but nothing changes.
I had an HTC phone before this, and it'd reconnect automagically to my cars BT server, so I suspect it's nothing to do with the car's BT radio. I really miss that...
Thanks for any suggestions anyone might have in how to remedy this. Fwiw, I'm willing to go through a diagnostic procedure if someone would clue me in to just how to do that.
cheers,
john
I've had issues with the bluetooth and pairing. When I was on 4.2.2 (I think..) it wouldn't connect automatically at all, and I used an app to connect for me. I have a Chevrolet Cobalt and it wouldn't connect to my built in bluetooth for calls or a small bluetooth dongle that I use for playing music through the AUX input on the stock radio.
https://play.google.com/store/apps/details?id=org.myklos.btautoconnect&hl=en
Once I was on 4.4.2 it seemed to work much better. I have no real issues now on 4.4.4. The only time I notice it not really working right is when I try to connect to the bluetooth speaker in our bathroom at home. If I turn the speaker on, it almost always connects to my girlfriends phone nearly instantly, even though I open the bluetooth menu and tap the paired device to manually initiate right when I turn on the speaker. It usually takes me a few tries to get mine to connect before hers, or I ask her to shut her bluetooth off for a moment while I connect. She uses the speaker every day because she leaves for work after me, so it only happens to me 1-2 times per month on the off chance that I want to listen to music or a baseball game in the shower, so it never really bothered me much.
I think the bluetooth radio in this phone could be better.. I never had any similar issues with my Droid X or Moto Razr Maxx so I'm not sure what the deal is...
Edit: forgot to mention I also have an XT1060, but not dev edition. My bootloader is unlocked and I am rooted, but using the official 4.4.4 VZW rom with Xposed.
I have never had any issues pairing Bluetooth - on either my car or moto 360 watch (even simultaneously).
However, I have noticed that the Bluetooth connects much quicker on custom ROMs when compared to stock.
I think tour connection issue may be a setting or rogue app related.
Sent from my Moto X using XDA Free mobile app
Thanks to both of you for your replies!
Fwiw, things have not gotten any better since I posted my question. I'm getting more accustomed to it, though.
As for the possibility of a rogue app, yes I suppose so, but short of uninstalling everything, and adding them one by one and trying to connect to something via BT, how can someone go about debugging such a thing?
cheers,
john
jrredho said:
Thanks to both of you for your replies!
Fwiw, things have not gotten any better since I posted my question. I'm getting more accustomed to it, though.
As for the possibility of a rogue app, yes I suppose so, but short of uninstalling everything, and adding them one by one and trying to connect to something via BT, how can someone go about debugging such a thing?
cheers,
john
Click to expand...
Click to collapse
You may need to delete the profile for the Bluetooth pairing in your car. Could be a conflict there.
Otherwise, try looking at your Bluetooth settings on the phone.
Sent from my Moto X using XDA Free mobile app
jrredho said:
...
I have an XT1060, Dev Ed, on KK 4.4.4, and I'm just wondering, am I the only one who cannot get my bluetooth radio to hook up to paired devices easily?
The problem is, I always have to ask to connect manually; this is a bit of a pain, especially after turning off my car, say, for a few seconds. Oh, it'll connect, but sometimes it takes 10-15 tries before that connection is made, and even then, it's often after I have to disconnect then attempt to reconnect a few times because it doesn't connect both the phone and media modes.
Click to expand...
Click to collapse
Is it *ALL* bluetooth devices, or just the car? What model and year car? Are you connecting to the Hands Free profile, Headset Profile, or doing something like A2DP for music streaming?
How long have you had the phone, how long has this been a problem? Has the symptom ever changed?
Keep in mind, just because your HTC phone connected to the car just fine, doesn't mean the car could not be the issue. While the Bluetooth profiles and protocols should be "standard" I've seen many issues of interoperability issues between bluetooth devices over the years. Especially with car kits.
KidJoe said:
Is it *ALL* bluetooth devices, or just the car? What model and year car? Are you connecting to the Hands Free profile, Headset Profile, or doing something like A2DP for music streaming?
How long have you had the phone, how long has this been a problem? Has the symptom ever changed?
Keep in mind, just because your HTC phone connected to the car just fine, doesn't mean the car could not be the issue. While the Bluetooth profiles and protocols should be "standard" I've seen many issues of interoperability issues between bluetooth devices over the years. Especially with car kits.
Click to expand...
Click to collapse
Guys, thanks for staying with me on this. One thing I've definitely learned is that the bluetooth thing is something I'm pretty ignorant on. I can see that I'm going to have to study it a bit before too long. Gad, that HTC spoiled me rotten---at least in that way.
I haven't tried the phone with any other BT devices. This is mostly because I don't own but two, the car and a travel speaker, and I haven't had the speaker out of its case since I scored the phone six or eight weeks ago. Also, I did some housecleaning, so I have only a small fraction, maybe 20%, of the same apps on the MotoX that I had on the HTC. I have no apps on the MotoX that I didn't have on the latter.
As for some of the car-related suggestions, it's a 2015 Subaru Forester Premium 2.5i, which is really only level up from the base model of that line. I can't find that there is a bluetooth profile setting in the car that I can change; I think that it's too basic. The relevant user manual simply states the following:
Media format
Bluetooth audio devices cannot be
connected if they are not compatible with
the following Bluetooth® profiles.
. A2DP (Advanced Audio Distribution
Profile)
. AVRCP (Audio/Video Remote Control
Profile)
I don't even know what either of those mean!
Anyway, what I did do is go to the phone settings, and uncheck the Media box that shows up once the car's BT server is detected. Then I try to connect with the Phone box checked. It'll still fail to connect several times, but (a) it doesn't take as long to fail to connect, (b) it doesn't take as many tries (it seems) to make the connection, and (c) when it fails, it fails totally, so I don't have to disconnect from 'Media-only Connected (No Phone)' connection. That makes it easier I suppose. Then once the connection is established, it's a simple matter to go back to settings, and check the Media box. That add-on connection happens pretty quickly, but the process is still a little overwrought, imo.
Of course, KidJoe, up until you mentioned a Headset Profile, I didn't know one existed. But when I try to play music on my phone using PowerAmp, well, the app doesn't hook up to the BT anyway. That's a key difference between the HTC and the MotoX. In PowerAmp, I have "Play over Bluetooth on Detection" selected. The headset isn't being detected at all. So maybe that goes some distance to explaining what I'm encountering.
Again thanks to both of guys for hanging in there with me! I'll keep trudging "onward through the fog," as it were...
cheers,
john
A2DP and AVRC are used for Bluetooth Stereo audio streaming (like playing Pandora on your phone via your car stereo). Not phone calls.
For phone calls, usually a Headset or Handsfree profiles are used, and sometimes BT Phone Book Access (so you can see your phone's contact names/numbers on the car's screen).
I've run into compatibility issues between some phones and some Headset/Handfree devices (mostly cars, but a few bluetooth headsets too). Often times when this happens, you're stuck. Each side will blame the other (i.e. Moto will blame the Subaru car stereo, and Subaru will blame the phone).
I have had issues re-connecting to my car (a 2011 Saab 9-4x with Bose/Nav), IF I had my Moto S11 Flex HD headset connected to my Moto X before I got in the car (even if the S11 was powered off/disconnected from the X before I started the car). Usually toggling the X's bluetooth off/on, and sometimes worst case rebooting the phone, has always fixed it.. Another time I had troubles connecting to my Saab's car kit was when my wife was using her phone to stream audio. The next time I got in the car, I had to manually connect my phone. The car always tries to connect to the the last phone used, so it was looking for my wifes and it took a while before it timed out. When it did time out, it didn't look for mine.
Since you have a 2015 Subaru, I would consider visiting your car dealer, ask them to help with pairing the phone properly, and making sure its working right. See what they have to say.
My bluetooth in my car stopped pairing the other day, and it turns out it was an app that updated and requested permissions related to bluetooth. I didn't notice them because it's an app I trust so I accepted the new permissions without really looking at it.
I used App Settings (Xposed module) to disable the permissions and my bluetooth works fine again.
I could still pair with things if I went to the bluetooth paired device list and manually tapped on the device I wanted to connect with, but it would not pair automatically (like when I got in my car). Once I disabled that permission, it started working again without issue.
May be worth a look through your installed apps to see if anything has access to bluetooth and may be interfering.
Hey All,
Thanks again for the continued help!
It's true, I didn't do any research on app interference before I posted this thread topic, but since a couple of you have brought it up, I decided to do a little research. I installed a permissions app, and took a look at the permissions that allows an app to automatically seek out, and pair with, Bluetooth servers. I have to admit, I got some surprises there. (Who would've thought that Beautiful Widgets needed that permission; it is now gone.)
Anyway, most of the remaining apps are either system/Moto-related, or ones I would really like to keep. I'll report back on what I learn. If there are other permissions that I need to reference besides the two pairing-connecting to Bluetooth ones please let me know...
cheers,
john

Possible to use a Bluetooth Headset with Android Auto?

Hello,
I just purchased and installed a Pioneer AVH-4100NEX. So far it's pretty slick. I'll be using it with my Galaxy S6.
I noticed that when I try to disable the Call Audio Bluetooth profile from the phone side, it re-enables itself... like I HAVE to use the NEX for call audio.
I would like to be able to turn on my BT headset and use that instead, without much hassle. There are definitely times where I'll be in the car with other people and don't want the whole car to hear the conversation. It also presents a call quality issue with the far end being able to hear the system speakers.
Do I have to unplug USB from the NEX to make this work?
muzicman82 said:
Hello,
I just purchased and installed a Pioneer AVH-4100NEX. So far it's pretty slick. I'll be using it with my Galaxy S6.
I noticed that when I try to disable the Call Audio Bluetooth profile from the phone side, it re-enables itself... like I HAVE to use the NEX for call audio.
I would like to be able to turn on my BT headset and use that instead, without much hassle. There are definitely times where I'll be in the car with other people and don't want the whole car to hear the conversation. It also presents a call quality issue with the far end being able to hear the system speakers.
Do I have to unplug USB from the NEX to make this work?
Click to expand...
Click to collapse
I would like to know this also
I have same unit, try having headset connected before plugging in your phone. That may work
Sent from my SM-N910V using Tapatalk
I'm bumping this up. With my previous phone (LG V10) I could select which device use to make phone calls, Android Auto device or a bluetooth headset (Plantronics). Now with a Oneplus 3T that is not possible anymore.
AA automatically rerouting "BT phone" to main AA device. That is really annoying.
If someone knows a workaround to this please give advice, thanks...
You have to have it enabled, in a nutshell the unit (Pioneer) declares that it has bluetooth capabilities and declares the bluetooth mac address when it initialize the connection, than Android Auto (trough Google Play Services which is a system app) will enable the bluetooth, set up a pairing if it doesn't exist and connect to it, so no matter what you do it will always connect to it, the only way to "avoid" this is:
a) Get another phone which connects to the Pioneer bluetooth, then connect the phone (haven't tried this, but probably will do the trick)
b) Alter the pioneer unit so it doesn't send the bluetooth mac and it doesn't declare the bluetooth service (almost impossible, you will need to replace the app on the unit)

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