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Discussion Starter #1 (Edited)
Bluetooth Audio via MMI/AMI *Finally Possible (on Full MMI 3G Only)*

OK - So I've spoken a bit about trying to get some kind of decent bluetooth audio support on the MMI/AMI system:

A5OC - Streaming Audio Possible...here's how

A5OC - relocate Ipod Cable

However this weekend I finally had the brainwave which made it possible:

YouTube - Audi MMI 3G Bluetooth Audio Solution (via Modified iPod AMI Cable)

This uses the regular iPod AMI Cable and any iPod accessory out there to make any iPod speaker dock system bluetooth capable (lots of them but get a decent one since it will be doing digital to analogue conversion), the trick is to modify the AMI cable so that the MMI/AMI system thinks the 3.5mm Stereo AMI Cable is connected otherwise it will try to talk to the iPod in Apple language.

This is better than using the regular 3.5mm Stereo AMI Cable with a similar bluetooth receiver accessory because it is cleaner and you don't have to worry about providing power or charging batteries in the receiver.

The modified iPod AMI Cable will still work directly with an iPod (albeit as an external audio input only, no AMI control) but a switch could be added to enable the cable to function in both modes - essentially a compatibility switch which would select whether a real iPod is connected (fluent in Apple language required for AMI control) or a dummy iPod is connected (e.g. bluetooth receiver, not fluent in Apple language).

I just wanted to put this out there to see what people think :)

Note: The ugly thing connected to the iPod in the video is just a bluetooth transmitter since the iPod Classic doesn't have builtin bluetooth, it wouldn't be required on any other bluetooth capable device (e.g. iPod Touch, iPhone or even non-Apple device).
 

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Discussion Starter #2
On another note, whilst researching this I found that there are pins on the glovebox AMI connector for FBAS (video) although they are not used on the iPod AMI cable it would be easy for Audi to support video via AMI with a software update and new AMI cables.
 

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I think it's fantastic, but how did you modify the cable? Don't leave us hanging! :thumbsup:
 

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Discussion Starter #4
I think it's fantastic, but how did you modify the cable? Don't leave us hanging! :thumbsup:
Two of the pins connect an inline resistor, this resistor needs to be changed from 18.7KΩ (iPod) to 1KΩ (3.5mm stereo) since the resistance indicates which type of cable is connected also there is an "iPod Detect" wire on pin 16 which needs to be disconnected.

That's it, everything else remains the same; the hardest part was getting into the plastic assembly.
 

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Two of the pins connect an inline resistor, this resistor needs to be changed from 18.7KΩ (iPod) to 1KΩ (3.5mm stereo) since the resistance indicates which type of cable is connected also there is an "iPod Detect" wire on pin 16 which needs to be disconnected.

That's it, everything else remains the same; the hardest part was getting into the plastic assembly.
Thanks! It'd be greatly appreciated if you could provide pictures of the modified cable for those of us who'd like to try this out. And what kind of bluetooth receiver did you plug into your Audi?
 

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Discussion Starter #7
This is pretty awesome. I would love to give this a go myself :)
Give it a go - so long as you are careful the mods on the cable are completely reversible.
 

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W.ashcroft,

What you did is exactly what I was looking for. I like to use my iphone to call people and listen to my music without having my iphone in the glove box. In saying so, though...I'm not very electronic savvy. So...can you do myself and many like me a favor and write a "How To"?

For example...

Before starting, purchase Blah blah blah (item to purchase link(s)). Have blah blah blah tools ready.

Step 1: Start by doing blah blah blah.

Step 2: Do blah blah blah.

Step 3: So on...

Pictures would be nice if you can.


I ready the above links you provided and watched the video. So, I know I need to purchase a BlueTooth adapter to fit into my AMI cable in the glovebox, but I got lost when you were talking about having the BT adapter being able to power itself via the AMI cable and changing the ohm. Thanks in advance.

Zippy
 

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Discussion Starter #9
OK - I will take some pictures and put together some step-by-step instructions for modifying the iPod AMI cable; give me a day or so.
 

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Thats very good of you man. I appreciate that writing a guide for something like this isn't the easiest thing to do. It is a very cool hack though :D
 

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Discussion Starter #12
As requested, here is a short guide to modifying the iPod AMI Cable:
(click pictures for larger versions)

1) The hardest part is opening up the AMI connector, I found that twisting a nylon bojo/prying tool at the side of the connector released at least one retaining clip allowing you to work your way around to carefully release the others.



2) Once the cap is fully unclipped, the plastic body simply slides off.



3) Now you can open up the connector, the two pieces of metal casing easily separate to reveal the wiring.



4) On the left you can see the "detection" resistor loop (resistor contained within the black tubing), along with power supply wires, iPod/USB data wires in the middle and audio wires on the right.



5) Disconnect all six iPod/USB data wires in the middle by either cutting them or removing them from the connector - to remove them from the connector you will need to use something like a needle to press on the pins to release them; either way ensure they are disconnected and are safely insulated from one another to prevent iPod damage.

It is necessary to disconnect these wires so that the MMI/AMI system isn't confused by having an iPod (or accessory) connected but detection resistor telling it otherwise and vice versa to prevent the iPod from getting confused.





6) Finally the resistor loop needs some attention, this resistor needs to be changed from 18.7KΩ (iPod) to 1KΩ (3.5mm stereo) since the resistance indicates to the MMI/AMI system which type of cable is connected - simply cut out the existing resistor and connect in the new resistor (e.g. solder it in), or you could remove the loop pins from the connector and connect the new resistor directly to the pins and reinsert pins.



7) That's it! Tuck all the wires back into the metal casing and reverse the cable disassembly to put/clip everything back together.

 

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Why can't you be in the Tri-State Area, I'd pay a decent amount of money for this upgrade. Good luck to anyone attempting this I'm too much of a wimp to attempt it. Cheers on the write up! :cheers:
 

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Discussion Starter #14 (Edited)
Why can't you be in the Tri-State Area, I'd pay a decent amount of money for this upgrade. Good luck to anyone attempting this I'm too much of a wimp to attempt it. Cheers on the write up! :cheers:
If anybody would like to send me their iPod AMI cable or pay for a new one I would be happy to modify it for them and send back :)
 

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Excellent post w.ashcroft. I can see you being inundated after an offer like that. I'm off to watch the video!!
 

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Thanks for the detailed instructions. I'm gonna try this myself. Last question, what brand bluetooth receiver did you end up using? I was trying to make it out in the youtube video, but it was too blurry.
 

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Discussion Starter #17
I'm gonna try this myself. Last question, what brand bluetooth receiver did you end up using?
In the video it was the QED uPlay Bluetooth Receiver but I have also tested with a Sprint Anycom FIPO.
 

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Thx for the guide :) I've got a spare ipod cable to give this a go. Will pickup the extra stuff I need next time i'm in maplin
 

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W.ashcroft,

A huge thanks!

I just have couple of questions.

1. What happened from your second to last picture to the last picture? All the wires that you pulled out, what did you do? I don't see it in the last picture. Also, the resistor that is sitting by itself in second to the last picture, you said you have to solder that it, but I don't see that in the last picture either. A bit confused.

2. Once I purchase the BlueTooth transmitter/radio and hook it up to the "modded" AMI cable, it will now power the BT transmitter as well?

3. Can you give us the link where you purchased the BT transmitter? Thank you.

Z.
 

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Nice video. Especially the part where you hold the camcorder and try to plug into the BT receiver with the cable, hehe.

If I had my Audi, I'd pay you a pretty penny for this MOD.

Awesome.
 
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