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[Q] eee transformer in car (searching for pinout, tips, bluetooth headset router, ..)

OP fpdragon

3rd August 2011, 09:07 AM   |  #1  
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hi!

I just ordered an asus eee tab transformer for my car, as car entertainment system and navigation system. I am planing to invest some time o modify the hardware of the car to fit the tab optimately in.

One thing I'd like to do is to let the car command the tab for boot and shutdown. I am thinking of using the asus docking station interface of the tab but I have no pinout of this connector at the moment. Can anybody help here?
Maybe it is also possible to throw typical "next", "back", "play", "stop", ... commands? I am expecting an serial interface or something similar. Since I am an routined embedded developer, with a pinout this should be no problem.

The second thing is maybe a software thing.
I have an bluetooth car radio which supports one connection at the same time. The Idea was to use the Tab with bluetooth a2dp but with this connection all calls on my bluetooth phone are ignored. Is there something to establish a android to android bluetooth connection where the tap plays the roll of a bluetooth a2dp headset.
So for music and navigation:
Tab <-> CarRadio
For phone calls:
Phone <-> Tab <-> CarRadio
The other thing is, can the android tablet keep 2 bluetooth connections at the same time from the hardware point of view?

Ok, I think I wrote enough for now ^^
Hope somebody can help with any information.
4th August 2011, 08:24 AM   |  #2  
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interested in this
4th August 2011, 08:32 AM   |  #3  
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+1

me too
4th August 2011, 09:08 AM   |  #4  
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maybe someone has a good link to the asus support?
4th August 2011, 09:24 AM   |  #5  
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oops, sorry
Last edited by gavin watson; 4th August 2011 at 09:25 AM. Reason: reposted, sorry!
4th August 2011, 08:29 PM   |  #6  
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Quote:
Originally Posted by fpdragon

hi!

I just ordered an asus eee tab transformer for my car, as car entertainment system and navigation system. I am planing to invest some time o modify the hardware of the car to fit the tab optimately in.

One thing I'd like to do is to let the car command the tab for boot and shutdown. I am thinking of using the asus docking station interface of the tab but I have no pinout of this connector at the moment. Can anybody help here?
Maybe it is also possible to throw typical "next", "back", "play", "stop", ... commands? I am expecting an serial interface or something similar. Since I am an routined embedded developer, with a pinout this should be no problem.

The second thing is maybe a software thing.
I have an bluetooth car radio which supports one connection at the same time. The Idea was to use the Tab with bluetooth a2dp but with this connection all calls on my bluetooth phone are ignored. Is there something to establish a android to android bluetooth connection where the tap plays the roll of a bluetooth a2dp headset.
So for music and navigation:
Tab <-> CarRadio
For phone calls:
Phone <-> Tab <-> CarRadio
The other thing is, can the android tablet keep 2 bluetooth connections at the same time from the hardware point of view?

Ok, I think I wrote enough for now ^^
Hope somebody can help with any information.


Something to consider when designing.
Not sure if this is going to be a permanent install or not. But you can easily set up your audio through the Hdmi instead of burning battery with your Bluetooth. At least you can still use your phone through the Bluetooth. You can also incorporate other monitors in other parts of the car. I was speaking to a car audio shop for this type of install myself a few weeks ago. I will try to get more details and report back. Was waiting for the desktop docking station to come out to really run with it.
5th August 2011, 08:25 AM   |  #7  
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Quote:
Originally Posted by tonyz3

Something to consider when designing.
Not sure if this is going to be a permanent install or not. But you can easily set up your audio through the Hdmi instead of burning battery with your Bluetooth. At least you can still use your phone through the Bluetooth. You can also incorporate other monitors in other parts of the car. I was speaking to a car audio shop for this type of install myself a few weeks ago. I will try to get more details and report back. Was waiting for the desktop docking station to come out to really run with it.

Thanks...
Bluetooth battery burn would be no problem since I want to load the battery over the car. Anyway... I'm afraid that there won't be something like a "bluetooth router" so I have to use the analog audio out. That brings me to my first question: I need the pinout of the asus connector to control the tab over the steering wheel control.
6th August 2011, 01:38 PM   |  #8  
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I don't think anyone's figured out a pinout yet, and even if they do, it wont be as simple as "this contact is for play, this one is for skip, etc". All those most likely go through a usb interface. Not that that would be impossible, but if you're using bluetooth your headunit should support AVRCP for sending those commands over bluetooth. Most android devices only support 1.0 right now, but that still gives you play/pause, stop, next, previous, maybe ff and rewind too.
9th August 2011, 09:36 AM   |  #9  
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As an embedded developer here follows one idea that maybe can help you.

Why not using all via BT, I will say you prob looking for some BT support inside the kernel. If you find a similar application using linux (google it), maybe you can ported it to the transformer. Compiling the kernel with new drivers is very easy, then u just need to get into the software part.

Have fun.
9th August 2011, 09:58 AM   |  #10  
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Quote:
Originally Posted by Narog

As an embedded developer here follows one idea that maybe can help you.

Why not using all via BT, I will say you prob looking for some BT support inside the kernel. If you find a similar application using linux (google it), maybe you can ported it to the transformer. Compiling the kernel with new drivers is very easy, then u just need to get into the software part.

Have fun.

Thanks for your post!

I was thinking about a similar idea. Bluetooth could be an alternative but with bluetooth it won't be possible to switch the device on. So I tried to find a pinout and maybe I have luck to command a power on. Anyway... Right now BT seems the more realistic way, you're right.

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