Develop Bugs

Car radio head unit that sends headset commands

Hi all, first post but I'm really curious about this. I have a Droid Incredible and a 2008 Corolla with the factory radio. I added an aux-in 3.5 mm jack (several actually) to the head unit using one of the standard kits that plugs into the CD changer port on the back of the radio. This works well, although I had to get some mini TRS-TRRS 3.5 adapters to stop the Incredible from having the problem where it thinks it's getting headset commands through a TRS headset plug and goes crazy.
The thing that I would love is if I could control my Incredible with the buttons on the head unit, at least to have the ability to skip tracks forward/back by pushing the radio buttons. As far as I can tell, this should be possible given the hardware. There are kits that use the CD changer port on the radio to control an iPod, so we know we can get the track forward/back buttons sent out. And we know the Incredible will take headset commands like play/pause, answer, voice dial, and track forward through the headphone jack (I know this partly because these are the things my Incredible does when it is going crazy from the TRS input).
So is there no adapter that will connect to my car radio CD changer port and send the radio button pushes out as TRRS headset commands? I am really surprised this doesn't exist, but have searched around the web to no avail. Considering trying to build something but I don't have experience with an electronics project of this scale.
Alternatively, there is probably going to be an audio in/out + remote control for the Incredible usb adapter at some point, like the one for the Droid Eris. I assume this will be available since we know the Incredible is wired for audio through the USB port (I know this from the videos online where the Incredible does video out with audio through the USB). So this would appear to be another option for running the car radio commands into the phone.

Okay, barring any device surfacing to handle this, I'm going ahead with some research of my own. Apparently one reason devices and information are not widely available is that Apple may have a patent on some forms of headset commands through the TRRS 3.5 or 2.5 mm jack. Since I'm a new forum user I can't post any links out right now; sorry.
I have a SkullCandy headphones+mic. They have a single button next to the mic. This button works to pause/play the Meridian music player on my Droid Incredible. Pushing the button twice rapidly pauses and then skips to the next track and plays. If I push the button when no music player is open, it opens Meridian and plays. If I push when some other music player is open, it opens Meridian and plays.
Presumably the button works by changing the resistance over the headphone wires. Checking the resistance between the sleeve (which seems to be ground) and the other contacts (Tip, Ring1, Ring2) I find that without the button pressed, the resistance is about 1 kOhm for all three. Pushing the button changes the resistances to be: 17 Ohm, 17 Ohm, 1 Ohm for the Tip, Ring1, Ring2 respectively.
So if I can figure out what the head unit sends to the CD changer when the radio buttons are pushed, I may be able to rig up something useful. I am still curious what other signals might be possible. When I have the shorting out going crazy behavior there definitely seems to be a case where it opens the voice dialer window or calls the last number in the call list. Not clear whether this is a different hardware signal or something about the software state of the phone when it gets the resistance change. Haven't yet tested what happens when you push the button and there is a call, but presumably it answers/hangs up. There are other headsets (for Apple players mostly) that have additional buttons too; not sure if that's relevant.

Hmm, I need a headunit for the same functions.
AFAIK for controllling a smartphone over bluetooth it must support AVRCP for controlling and A2DP for audio.
So I found this unit: Sony MEX-BT3800U
Iam going to buy this soon (need to sell some stuff).
Hope this runs with my Kaiser

@sda2: that one looks pretty good! A little pricey for me and I kind of like the aesthetic of having the factory radio but just having it do more. Keeps my car looking cheap and not theft-worthy.
I have confirmed that pretty much everything I've seen the phone do in response to headset commands is just dependent on the context the OS/software is in. So other than the single click or double click there doesn't seem to be a lot more that the phone is expecting to handle.
However, I did find an app called DroidShuffle that allows you to assign more functions to things like a long click or a triple click. Sadly, I couldn't get this app to work with my setup on the Incredible. But I think it is an interesting concept; since the OS only seems to understand 1 type of click, just write a service that lets it respond differently to different numbers or duration of click. Then setup a circuit that converts the different car radio head unit button pushes into these differentiable click trains.
Don't think I'm going to put the time in though; will wait to see what kind of control you can get through the micro-USB.
Another possibility: a device to convert the head unit button pushes to bluetooth AVRCP. This might be more widely useful, but I think the complexity and cost versus a wired solution push it towards the point where just getting a new head unit makes more sense. Unless I can find a simple generic AVRCP chip...

I think what you're looking for is something like this? It comes with a wireless strap that you can put on your steering wheel that gives you control over your device. Basic stuff like answering phone, play music, and move track forward and back. Plus, it uses a 3.5mm port, so no stupid bad quality FM radio. As long as Bluetooth is enabled, it automatically connects to the device. So all you gotta do is walk into the car.
BTW, I have this hooked up to my Pioneer stereo, using the P-BUS that all Pioneers have. I just needed a adapter. Not to confuse anyone, this needs a car stereo with a 3.5mm aux jack. You can usually get an adapter that plugs in the back where the CD changer would normally go, and avoid the terrible FM radio quality. Don't waste your time with FM radio adapters.
http://www.amazon.com/gp/product/B0011UIX2K/ref=oss_product
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@DukeNukem: This looks nice; I especially like the steering wheel remote. I am still going to play with decoding the output from the head unit buttons, and I ordered a microcontroller and bluetooth module to see if I can actually get it speaking AVRCP without giving myself a stroke. But that has moved into fun project land so I think your suggestion will be the practical solution, especially if I can find it for < $50.

yeah i also need that for my relative who has the same problem about the Car radio head unit that sends headset commands
thanks!!

Well, I bought a Really Bare Bones Board (Arduino compatible that's small, cheap, and easy to breadboard) from Modern Device. Based on several Corolla AVCLAN sniffing projects out there on the web (Marcin, SigmaObjects, AngryCamel) it was pretty easy to get something up and running that sniffs the bus for head unit messages.
Since I already paid the $50 for the box that emulates a CD changer to add aux-in, I don't need to worry about that, but it should be pretty easy to accomplish that with the microcontroller as well.
For sending headset commands through the 3.5 mm jack, I think I'm pretty close. Not exactly sure how to emulate a click on the headset button, but I would guess a simple transistor can do the job since it's basically just a change in resistance.
I bought a bluetooth chip though, so I am trying to get messages to my phone through that for now. There is a post on android forums where someone has hacked the pinout for the USB/AV port on the Droid Incredible too, so I'm hoping it will be possible to send commands through that at some time soon.
Will plan to post project details at some point, but it's still a work in progress for now.

You can try with this one:
mytrendyphone.co.uk
Clarion DXZ588RUSB USB/MP3 Radio - Black

Okay, I have a simple version essentially working: can capture commands from the car radio and signal simple headset clicks to the smartphone. Haven't written the software to link everything up yet; will post when that's done.
http://www.flickr.com/photos/chinasaur/4732574146/
http://fritzing.org/projects/cellphone-headset-clicker/

It should be fairly trivial to modify VWCDPIC (for Audi / Volkswagen / SEAT / Skoda) etc, to do this. I may look into doing this for my HTC HD2 soon, if no-one has done this yet.
For emulating the button pushes, on the TRRS I think you should just connect the lines to each TRR, and just leave them in input mode (high resistance). Then when you want to send a command, just pull the line down to ground. If you're worried about applying too much resistance, add a resistor between the micro and the tip or ring.
On my HTC headset:
Play/Pause/Phone - Pull the second ring down to ground (Mic line)
Previous Track - Pull the first ring down from 20kOhm to ~235 Ohm
Next Track - Pull the tip from 20kOhm to ~600 Ohm

Thanks for that futaris; I'll check out whether I get different behaviors for pulling different lines to ground.

Hallo,
I have in my car VWCDPIC working with my android HTC desire phone, but now without remote control of this phone. For me is enough implement jump between tags and play/stop function - so the same functions which I have on headset for my phone.
I checked firmware which is here :
http://www.k9spud.com/vwcdpic/devel/vwcdpic3/flash/
and checked source code. I found inside source code this information :
; VWCDPIC Volkswagen CMR PIC16F627(a)/PIC16F628(a) Connections
;--------------------------------------------------------------------------
; PIC RA3 -> VW Pin 2 Clock to Head Unit
; PIC RA2 -> VW Pin 1 Data to Head Unit
; PIC RB0 <- VW Pin 4 Data from Head Unit
; Make sure PIC and VW Head Unit have common GND.
;
; PIC RB6 -> PJRC MP3 Player RX (19.2Kbps serial)
; PIC RB7 -> Archos Jukebox RX (9600bps serial with weak pull-up)
; Make sure PIC and MP3 Player have common GND.
;
; Volkswagen CMR:
; PIC RB1 -> TP11 when button Mix is pressed has about 15
; seconds logic low output (one pulse)
; ALSO:
; when soft-button CD6 is pressed, TP11 has
; about 3 seconds logic low output (one pulse)
; FINALLY:
; when button SCAN is pressed, TP11 has about 20ms
; logic low output (one pulse)
;
; PIC RB2 -> TP14 when button Next Track (>>) is pressed, has
; about 20ms logic low output (one pulse)
;
; PIC RB3 -> TP15 when button Last Track (<<) is pressed, TP15
; has about 20ms logic low output (one pulse)
;
; PIC RB4 -> Track number is incremented when one pulse (low active) on RB4
;
; PIC RB5 -> Track number is decremented when one pulse (low active) on RB5
Important information is that on RB2 and RB3 is pulse after next/last track pressing. But it's for PIC16F627 with 16pins.
What I need is modify this firmware for PIC12F629 which is now connected :
; VWCDPIC 3.x PIC12F629/PIC12F675/PIC12F683 Connections
;--------------------------------------------------------------------------
; PIC GP0 -> VW Pin 2 Clock to Head Unit
; PIC GP1 -> VW Pin 1 Data to Head Unit
; PIC GP2 <- VW Pin 4 Data from Head Unit
; Make sure PIC and VW Head Unit have common GND.
;
; PIC GP4 -> PJRC MP3 Player RX (19.2Kbps serial)
; PIC GP5 -> Archos Jukebox RX (9600bps serial with weak pull-up)
; Make sure PIC and MP3 Player have common GND.
so I want cancel GP4 and GP5 - I don't need this serial communication and on GP3, GP4, GP5 I need next/last track pulse and play/stop pulse.
Is there somebody who is able change program and implement it ?
Thanks
Alda

You guys inspired me to look deeper into this. I found a few potential solutions. I am not one to really spend a lot of money on this type of stuff, but there is one heck of a solutions commercially available:
(can't post a link, but lookup Scosche BT1200)
If you click on the download link and look at the instructions, you can really see how this thing works. It is a pretty elegant solution, but then again you pay for it as well. I like that it allows BT streaming or direct connect.
It seems to me that the whole reason this stuff is so hard to find is due to Apple's longtime patent of a way of controlling portable audio devices. I am not sure what the specifics are, but you certainly don't see anyone making a nice adapter/connector from iPod to TRRS that codes these commands for TRRS signaling. My fiance has a car with play/pause, volume controls on the steering wheel, and I would love to have it all work with a generic mp3 player, but unfortunately it is set to work with an iPod, and there doesn't seem to be any other way about it. It is almost like consumers are being bullied by these patents. I want the functionality, but I am not going to be stuck with buying from that brand.

I think that best way is firmware modification as posted futaris , but I don't have enough skills to do that. Or is some modificaton for HTC phones ( and not only HTC - it's only about resistance ) available now ?
Alda

Audi BNS5.0 QuadLock - NU3001 Installation

Continuation of the discussion between kravmangoon and JanDK found starting here: http://forum.xda-developers.com/and...tkat-head-unit-newsmy-carpad-t2865525/page753

ahhh, thx for this info too. My guess is that this one could power up the amp, but don't know which one to connect it to.....( wish I could post pics ).
I'm assuming all you need is this to get the amp running.
Click to expand...
Click to collapse
Look for an open switch on the original stereo diagram. Pin 13 might be the wire you're looking for but I'm sort of guessing without seeing the pinout diagram.
There's a green connector in the Quadlock, three wires are going to it, and according to the diagram on the OEM HU, there's a yellow=LO-RR , a green=LO-RL , and a purple=LINE(ground symbol). Guess it these you want me to connect the spliced RCAs to, right?
Click to expand...
Click to collapse
That sounds right to me. Line Out Rear Right(+), Line Out Rear Left(+), and a common ground (-) between the RCAs.

kravmangoon said:
Look for an open switch on the original stereo diagram. Pin 13 might be the wire you're looking for but I'm sort of guessing without seeing the pinout diagram.you're absolutely right, pin 13 is an open switch according the diagram on my OEM HU
That sounds right to me. Line Out Rear Right(+), Line Out Rear Left(+), and a common ground (-) between the RCAs.
Click to expand...
Click to collapse
I'll try to see if I can find a couple of RCA cables tomorrow, and give it a try
I just read in another forum, that the volume in the rear speakers will be lower than in the front speakers - I hope not, and if, I hope it wil be possible to adjust it with viper4android ( once I've moded the HU)
Thx for making this thread, makes sense, and not disturbing for others
I'll be back

JanDK said:
I'll try to see if I can find a couple of RCA cables tomorrow, and give it a try
I just read in another forum, that the volume in the rear speakers will be lower than in the front speakers - I hope not, and if, I hope it wil be possible to adjust it with viper4android ( once I've moded the HU)
Thx for making this thread, makes sense, and not disturbing for others
I'll be back
Click to expand...
Click to collapse
I wouldn't worry, there are a couple solutions:
-You can look into a line driver like this to bump up the RCA volume to match volumes more appropriately: http://www.amazon.com/Peripheral-PAC-LD10-Driver-Booster/dp/B003LWV77Y
-There's a built in app for balancing/fading. You should probably try to figure out if the RCA outputs correspond to the front or rear speakers (using the built in fader app, fade all the way front and all the way back to test; see which direction keeps the RCAs going). If the RCAs correspond to the front speakers (more than likely), than use the rear speaker/high-level outputs from the NU3001 to power the front speakers.
This will allow you to use the fader app (fading will just have the opposite affect as your fronts and rears are reversed).
Then you use Viper4android (turn on convolver --> Select something like Studer +6db IRS file). This would boost your overall volume once your speakers are appropriately matched/faded.

kravmangoon said:
I wouldn't worry, there are a couple solutions:
-You can look into a line driver like this to bump up the RCA volume to match volumes more appropriately: http://www.amazon.com/Peripheral-PAC-LD10-Driver-Booster/dp/B003LWV77Y
-There's a built in app for balancing/fading. You should probably try to figure out if the RCA outputs correspond to the front or rear speakers (using the built in fader app, fade all the way front and all the way back to test; see which direction keeps the RCAs going). If the RCAs correspond to the front speakers (more than likely), than use the rear speaker/high-level outputs from the NU3001 to power the front speakers.
This will allow you to use the fader app (fading will just have the opposite affect as your fronts and rears are reversed).
Then you use Viper4android (turn on convolver --> Select something like Studer +6db IRS file). This would boost your overall volume once your speakers are appropriately matched/faded.
Click to expand...
Click to collapse
It's up and running all 4 speakers, yeeehaaaa, :good:
No fader control in the factory version, so
Next step is to mod the HU, I'm sure I'll have questions regarding this too:silly:
Thx for your support

JanDK said:
No fader control in the factory version, so
Click to expand...
Click to collapse
It's in there, it's a separate app. I used 1.2.9 and 1.3.0 before switching to xDAuto.
I think it's called something like Sound Balance.
Thx for your support
Click to expand...
Click to collapse
Not a problem, glad I can help.

SD card mcu update
Hi, I'm back/ what format should I use to format the SD card for mcu update, fat32/Exfat/ms-dos fat ?
I've tried with Exfat and ms-dos fat, but the HU doesn't recognize any update on the card. I did excactly as described in the wiki Extract the files burn_mcu.hex and updatemcu.bin to the root of a SD card
This must be an external SD card, this will not work if placed on the internal SD or USB
Have to admit I not an android user,but an Appel user, a bit different....

JanDK said:
Hi, I'm back/ what format should I use to format the SD card for mcu update, fat32/Exfat/ms-dos fat ?
I've tried with Exfat and ms-dos fat, but the HU doesn't recognize any update on the card. I did excactly as described in the wiki Extract the files burn_mcu.hex and updatemcu.bin to the root of a SD card
This must be an external SD card, this will not work if placed on the internal SD or USB
Have to admit I not an android user,but an Appel user, a bit different....
Click to expand...
Click to collapse
I'm assuming you can see the external card in ESFileExplorer or in Settings-->Storage? It would be called External_sd or something like that.
After you're sure it's detected, all I needed to do was run the update in the MCU app ("Update Settings").
EDIT: I believe I used FAT32 for my SD card. Might be able to use NTFS.

kravmangoon said:
I'm assuming you can see the external card in ESFileExplorer or in Settings-->Storage? It would be called External_sd or something like that.
After you're sure it's detected, all I needed to do was run the update in the MCU app ("Update Settings").
EDIT: I believe I used FAT32 for my SD card. Might be able to use NTFS.
Click to expand...
Click to collapse
Hi, yes I'm able to see it in ESfileexplorer, but once I hit the mcu update button, it says no update file found.....
I'll try to format in the formats you mention.
How does your radio perform? / even though I've attached an amplifier to my OEM Audi FM antenna, it's only, poorly, able to receive local stations....Disappointing...
Kindly
Jan
Kind regards

JanDK said:
Hi, yes I'm able to see it in ESfileexplorer, but once I hit the mcu update button, it says no update file found.....
I'll try to format in the formats you mention.
How does your radio perform? / even though I've attached an amplifier to my OEM Audi FM antenna, it's only, poorly, able to receive local stations....Disappointing...
Kindly
Jan
Kind regards
Click to expand...
Click to collapse
Radio is iffy. Initially it was awful because I forgot to power the antenna with the blue lead coming off the harness (this is my first vehicle with a powered shark fin antenna). Once I connected it I was able to receive FM stations but I still don't think the reception is great. I ordered this and it actually arrived today, probably similar to what you bought. I'll let you know how it sounds after I install it.
Also, I can't get the AM radio to do much of anything. I don't know if this is uncommon: in the US, AM stations are every 10kHz. This unit doesn't even let you browse to those stations, I have to manually input a favorite station in order to enter a frequency ending in a "0". Even with the correct frequency tuned, I am not receiving anything.
I was always under the impression that radio manufacturers use a coil within the stereo to receive AM radio (as opposed to trying to have an antenna that receives a 300m wavelength signal). The fact that I'm not getting any AM stations makes me wonder if the coil in the unit is defective (or whether the coil even exists).

kravmangoon said:
Radio is iffy. Initially it was awful because I forgot to power the antenna with the blue lead coming off the harness (this is my first vehicle with a powered shark fin antenna). Once I connected it I was able to receive FM stations but I still don't think the reception is great. I ordered this and it actually arrived today, probably similar to what you bought. I'll let you know how it sounds after I install it.
Also, I can't get the AM radio to do much of anything. I don't know if this is uncommon: in the US, AM stations are every 10kHz. This unit doesn't even let you browse to those stations, I have to manually input a favorite station in order to enter a frequency ending in a "0". Even with the correct frequency tuned, I am not receiving anything.
I was always under the impression that radio manufacturers use a coil within the stereo to receive AM radio (as opposed to trying to have an antenna that receives a 300m wavelength signal). The fact that I'm not getting any AM stations makes me wonder if the coil in the unit is defective (or whether the coil even exists).
Click to expand...
Click to collapse
Hi?/ well,I've also supplied the aerial amplifier( all most like the one you ordered) with +12V, but it's just really really poor?/ think I'll go for the radio apps, perhaps TuneIn radio Pro, the one I uses on my iOS devices.
I managed to update the mcu( formatted the sd card in fat 32), only thing is, I think,it says version 1.1.7 or something like that, when I look in the mcu update menu, shouldn't it say something with ...30?
Excited to hear how your radio performs once you've installed the aerial amplifier.

JanDK said:
Hi/ well,I've also supplied the aerial amplifier( all most like the one you ordered) with +12V, but it's just really really poor/ think I'll go for the radio apps, perhaps TuneIn radio Pro, the one I uses on my iOS devices.
I managed to update the mcu( formatted the sd card in fat 32), only thing is, I think,it says version 1.1.7 or something like that, when I look in the mcu update menu, shouldn't it say something with ...30?
Excited to hear how your radio performs once you've installed the aerial amplifier.
Click to expand...
Click to collapse
Sorry, crazy hectic work week. I will see if I can get you a picture of what mine looks like.
1.1.8 sounds like the software version you have installed. I'm assuming you're running the stock software? If yes, I'd recommend at least trying xDAuto.
I switched to xDAuto (MCU v41) after messing around with stock software (1.2.9, 1.3.0 and MCU v47 and v48) and have found it to be a lot more reliable.

All that work, takes too much of our spare time [emoji23]
Where do you download your firmware and mcu update isn't it in here
http://xfer.aokp.co/?developer=zaphod&folder=nu3001/MCU ?
Where excactly do I look up for the firmware version and the mcu version, is it in about this device or in update settings?? / sorry for the noob quest. .....
Kindly
Jan

JanDK said:
All that work, takes too much of our spare time [emoji23]
Where do you download your firmware and mcu update isn't it in here
http://xfer.aokp.co/?developer=zaphod&folder=nu3001/MCU ?
Where excactly do I look up for the firmware version and the mcu version, is it in about this device or in update settings?? / sorry for the noob quest. .....
Kindly
Jan
Click to expand...
Click to collapse
It's in the Update Settings menu.
That's the right website. Only thing is that I needed to flash a custom recovery to use the image zip file (xdAuto-1.1.6c2.zip, see the wiki for Clockwork and TWRP instructions)

Found it, thx. It seems I'm running mcu v48, and firmware 1.1.7
Kindly
Jan

JanDK said:
Hi[emoji4]/ well,I've also supplied the aerial amplifier( all most like the one you ordered) with +12V, but it's just really really poor[emoji51]/ think I'll go for the radio apps, perhaps TuneIn radio Pro, the one I uses on my iOS devices.
I managed to update the mcu( formatted the sd card in fat 32), only thing is, I think,it says version 1.1.7 or something like that, when I look in the mcu update menu, shouldn't it say something with ...30?
Excited to hear how your radio performs once you've installed the aerial amplifier.
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Click to collapse
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Well, guess what, I just fixed my poor radio, I dismantled the double fakra plug on the antenna amplifier, and switched the two antenna cables, and voila, IT WORKS,perfectly [emoji108][emoji122][emoji4]
Kindly
Jan

What method did you use to install Xdauto, SD card or Pc? If Pc method, Did you only connect the android box to Pc, or did you connect a laptop in the car?
Kindly
Jan

__

JanDK said:
What method did you use to install Xdauto, SD card or Pc? If Pc method, Did you only connect the android box to Pc, or did you connect a laptop in the car?
Kindly
Jan
Click to expand...
Click to collapse
I brought it in the house and set it up via my PC. Had the HDMI cord plugged into a TV and used a USB keyboard/mouse combo to interact.
I copied the xDauto zip to the SDcard and then installed the zip using a custom recovery (need to check out the wiki for that). 1.1.6c2 (most recent version I see) only comes as a zip so I think you have to flash it via a custom recovery.
JanDK said:
View attachment 3534000
Well, guess what, I just fixed my poor radio, I dismantled the double fakra plug on the antenna amplifier, and switched the two antenna cables, and voila, IT WORKS,perfectly [emoji108][emoji122][emoji4]
Kindly
Jan
Click to expand...
Click to collapse
Nice, I plan to install the antenna amp in an hour or two.

Bluetooth medai control?

I have tried to pair two different bluetooth media controllers but neither will connect. I see them as available in the devices list but when I click connect nothing happens. I assume if I can see them in the list even the funky bt setup on this thing can use it or is that not correct?
I have a joying UQ124 its the no cd quad core version if it helps

Have you read this?
http://forum.xda-developers.com/and...head-units-qa/bluetooth-media-remote-t3283162

I did but was hoping someone had better results. Also, I was confused about the person who said they resolved an issue by using and xposed module. I didn't find any module that looks related to bt in a relevant way and was not sure if they were even having the same problem.
I guess I just want to know if this is even possable with this headunit or if I should keep looking for a solution.

dakkara303 said:
I have tried to pair two different bluetooth media controllers but neither will connect. I see them as available in the devices list but when I click connect nothing happens. I assume if I can see them in the list even the funky bt setup on this thing can use it or is that not correct?
I have a joying UQ124 its the no cd quad core version if it helps
Click to expand...
Click to collapse
I'm not sure exactly what you're trying to do with your specific bluetooth controllers, but if you are unable to get them to work as intended, consider the back-lit version of the Lenovo N5902 or something similar for multimedia control of your JY unit. The N5902 works well as a multimedia remote for Android or Windows home theater multimedia systems as well as Android head units. All you'll need is an open usb port for the small wireless dongle and you'll be good to go.
Best to all,
R

Ideally I would like to use something like
amazon /iSimple-Portable-Wireless-Smartphones-Bluetooth/dp/B00KPZN5UC/ref=pd_sim_107_2?ie=UTF8&dpID=411ue0yFG3L&dpSrc=sims&preST=_AC_UL160_SR160%2C160_&refRID=0QC6Y0SC8ZEF13W3638N
So I can have the controlls on the wheel, but I guess my underlying question is will the unit work with bt devices besides a phone and obd.

dakkara303 said:
Ideally I would like to use something like
amazon /iSimple-Portable-Wireless-Smartphones-Bluetooth/dp/B00KPZN5UC/ref=pd_sim_107_2?ie=UTF8&dpID=411ue0yFG3L&dpSrc=sims&preST=_AC_UL160_SR160%2C160_&refRID=0QC6Y0SC8ZEF13W3638N
So I can have the controlls on the wheel, but I guess my underlying question is will the unit work with bt devices besides a phone and obd.
Click to expand...
Click to collapse
I have installed an Axxess RFASWC Universal RF Steering Wheel Control, Once the receiver is set to radio type 11 connect the two wires to Key1, and key2 every button except the one on the back can be mapped.
Currently trying to find a usb or Bluetooth media control for android that connects to this HU but so far not been successful.

chuupa said:
I have installed an Axxess RFASWC Universal RF Steering Wheel Control, Once the receiver is set to radio type 11 connect the two wires to Key1, and key2 every button except the one on the back can be mapped.
Currently trying to find a usb or Bluetooth media control for android that connects to this HU but so far not been successful.
Click to expand...
Click to collapse
I may go that route, it looks a little clunky and not super well designed especially for over a hundred bucks, but may be me best option.

dakkara303 said:
I may go that route, it looks a little clunky and not super well designed especially for over a hundred bucks, but may be me best option.
Click to expand...
Click to collapse
I have to admit the Axxess RFASWC has worked out well for what it is, however I am currently waiting for a BMW I-Drive and an Arduino Leonardo board with in built CAN BUS to arrive.
Planning to write some software to convert the CAN BUS messages from the I-Drive into USB HID Remote commands.

dakkara303 said:
I may go that route, it looks a little clunky and not super well designed especially for over a hundred bucks, but may be me best option.
Click to expand...
Click to collapse
Check out the link below for a more cost effective SWC Key Button solution.
http://www.ebay.com/itm/151832759268?_trksid=p2060353.m2749.l2649&ssPageName=STRK:MEBIDX:IT
You can also possibly find these units even cheaper online by searching for:
SWC Key Button FEELDO 4252 For Android DVD Head Unit
or
Car Steering Wheel Control Key Button For Android DVD/GPS Player Bluetooth Phone
Please note that I've only installed one of these units on a Joying JY-UQ124, and 6 out of the 7 buttons work correctly. The lower right call button does not register any signal in the JY SWC settings, so I'm guessing the button is defective. That stated, it's been about two weeks since requesting help from the ebay seller, and I'm still waiting for a reply on this specific inoperative button issue. Hopefully, the delayed reply is only due to the long Chinese New Year holiday.
Hope this helps...
Best to all,
R

chuupa said:
I have to admit the Axxess RFASWC has worked out well for what it is, however I am currently waiting for a BMW I-Drive and an Arduino Leonardo board with in built CAN BUS to arrive.
Planning to write some software to convert the CAN BUS messages from the I-Drive into USB HID Remote commands.
Click to expand...
Click to collapse
Will the iDrive work in other cars? If so if you make that code you may just be my hero. Something like that is exactly what I origonally wanted.

rhacy said:
Check out the link below for a more cost effective SWC Key Button solution.
http://www.ebay.com/itm/151832759268?_trksid=p2060353.m2749.l2649&ssPageName=STRK:MEBIDX:IT
You can also possibly find these units even cheaper online by searching for:
SWC Key Button FEELDO 4252 For Android DVD Head Unit
or
Car Steering Wheel Control Key Button For Android DVD/GPS Player Bluetooth Phone
Please note that I've only installed one of these units on a Joying JY-UQ124, and 6 out of the 7 buttons work correctly. The lower right call button does not register any signal in the JY SWC settings, so I'm guessing the button is defective. That stated, it's been about two weeks since requesting help from the ebay seller, and I'm still waiting for a reply on this specific inoperative button issue. Hopefully, the delayed reply is only due to the long Chinese New Year holiday.
Hope this helps...
Best to all,
R
Click to expand...
Click to collapse
I went ahead and ordered one of these because for the price I think it will do really close to everything I want. I will let you know if my button works in case it is just a design problem, save you trouble dealing with vendor. Of course, it may take a month to get here =/

dakkara303 said:
Will the iDrive work in other cars? If so if you make that code you may just be my hero. Something like that is exactly what I origonally wanted.
Click to expand...
Click to collapse
Totally possible, infact the bluetooth version has been done already http://www.volcano.at/iDrive/
The iDrive controller and arduino arrived earlier today and only played around with then for half an hour making sure they were working, so far managed to receive lots of CAN BUS raw data.
I have also downloaded a shed load of BMW CAN BUS codes that I have yet to go through, but my initial thought is to try sending the code to impersonate turning the lights on to see which set turns on the key backlights.
Once i have more time I will get a better understanding about how the CAN BUS side of things work, and hopefully do what I want to do.

Just thought I would do a quick update on getting the BMW IDrive working with the Head Unit.
most things that i want it to do works, but the rotary part of the control, for some reason I cant get that to initialise and start sending messages when twisted.
Whats working..
Stick press -> Play/Pause
Stick left/right -> prev/next track
Stick up/down -> vol up/down
Menu -> home
Back -> back
Media -> sends shortcut keypress that starts amazon music
Radio -> sends shortcut keypress that starts the radio
Tel -> sends shortcut keypress that starts bluetooth
Nav -> sends shortcut keypress that starts Here nav
Option -> i keep a record of the last shortcut and it starts the next in line (Amazon Music>Radio>Bluetooth>nav)
What i need to do..
Enable long press for left/right -> fastforward/rewind
Enable long press for up/down -> continuous volume up and down until i release it.
and the damn rotary control lol.
adding a sensor that detects the brightness of my dash lights and alters the controller led brightness, at present i just have it set to 50% brightness all the time.
parts used.
http://www.hobbytronics.co.uk/leonardo-canbus?keyword=can bus
http://www.ebay.co.uk/itm/BMW-F-Ser...060399?hash=item2a617abdef:g:MEgAAOSwzhVWreEK
links to the sites/people that made it all ossible (the really clever people)
http://www.volcano.at/iDrive/
http://www.loopybunny.co.uk/CarPC/k_can.html

rhacy said:
Check out the link below for a more cost effective SWC Key Button solution.
http://www.ebay.com/itm/151832759268?_trksid=p2060353.m2749.l2649&ssPageName=STRK:MEBIDX:IT
You can also possibly find these units even cheaper online by searching for:
SWC Key Button FEELDO 4252 For Android DVD Head Unit
or
Car Steering Wheel Control Key Button For Android DVD/GPS Player Bluetooth Phone
Please note that I've only installed one of these units on a Joying JY-UQ124, and 6 out of the 7 buttons work correctly. The lower right call button does not register any signal in the JY SWC settings, so I'm guessing the button is defective. That stated, it's been about two weeks since requesting help from the ebay seller, and I'm still waiting for a reply on this specific inoperative button issue. Hopefully, the delayed reply is only due to the long Chinese New Year holiday.
Hope this helps...
Best to all,
R
Click to expand...
Click to collapse
This is awesome! I've been looking for a cheaper solution than the axxess model. Thanks for posting!

chuupa said:
parts used.
http://www.hobbytronics.co.uk/leonardo-canbus?keyword=can bus
http://www.ebay.co.uk/itm/BMW-F-Ser...060399?hash=item2a617abdef:g:MEgAAOSwzhVWreEK
links to the sites/people that made it all ossible (the really clever people)
http://www.volcano.at/iDrive/
http://www.loopybunny.co.uk/CarPC/k_can.html
Click to expand...
Click to collapse
So the leonardo-canbus is like the controller/converter and talks directly to the HU? That is really cool, and I need to up my microcontroller game!

dakkara303 said:
So the leonardo-canbus is like the controller/converter and talks directly to the HU? That is really cool, and I need to up my microcontroller game!
Click to expand...
Click to collapse
Yes, very nice implementation by hobbytronics, the HU thinks it is connected with both a USB HID Keyboard, and a USB HID Remote.
USB Keyboard starts the default apps i have setup with https://play.google.com/store/apps/details?id=com.apedroid.hwkeyboardhelper&hl=en and takes care of HOME (Menu), BACK (Back), and Switching between recent apps with the option button.
USB Remote takes care of Pev, Next, Play/Pause, Volume, etc..
Once i have it all working I will post the code up here.

rhacy said:
Check out the link below for a more cost effective SWC Key Button solution.
http://www.ebay.com/itm/151832759268?_trksid=p2060353.m2749.l2649&ssPageName=STRK:MEBIDX:IT
You can also possibly find these units even cheaper online by searching for:
SWC Key Button FEELDO 4252 For Android DVD Head Unit
or
Car Steering Wheel Control Key Button For Android DVD/GPS Player Bluetooth Phone
Please note that I've only installed one of these units on a Joying JY-UQ124, and 6 out of the 7 buttons work correctly. The lower right call button does not register any signal in the JY SWC settings, so I'm guessing the button is defective. That stated, it's been about two weeks since requesting help from the ebay seller, and I'm still waiting for a reply on this specific inoperative button issue. Hopefully, the delayed reply is only due to the long Chinese New Year holiday.
Hope this helps...
Best to all,
R
Click to expand...
Click to collapse
Hey, just wanted to followup with you. I received my unit in the mail today and installed it tonight. Every button works great! Thanks again for the recommendation!

chuupa said:
Just thought I would do a quick update on getting the BMW IDrive working with the Head Unit.
most things that i want it to do works, but the rotary part of the control, for some reason I cant get that to initialise and start sending messages when twisted.
Whats working..
Stick press -> Play/Pause
Stick left/right -> prev/next track
Stick up/down -> vol up/down
Menu -> home
Back -> back
Media -> sends shortcut keypress that starts amazon music
Radio -> sends shortcut keypress that starts the radio
Tel -> sends shortcut keypress that starts bluetooth
Nav -> sends shortcut keypress that starts Here nav
Option -> i keep a record of the last shortcut and it starts the next in line (Amazon Music>Radio>Bluetooth>nav)
What i need to do..
Enable long press for left/right -> fastforward/rewind
Enable long press for up/down -> continuous volume up and down until i release it.
and the damn rotary control lol.
adding a sensor that detects the brightness of my dash lights and alters the controller led brightness, at present i just have it set to 50% brightness all the time.
parts used.
http://www.hobbytronics.co.uk/leonardo-canbus?keyword=can bus
http://www.ebay.co.uk/itm/BMW-F-Ser...060399?hash=item2a617abdef:g:MEgAAOSwzhVWreEK
links to the sites/people that made it all ossible (the really clever people)
http://www.volcano.at/iDrive/
http://www.loopybunny.co.uk/CarPC/k_can.html
Click to expand...
Click to collapse
Is the F Series the only one that wwill work with the system? Also, do you know how big it is under the knob-thing? I am short on space in my console area. Thanks!

dcmtnbkr said:
Hey, just wanted to followup with you. I received my unit in the mail today and installed it tonight. Every button works great! Thanks again for the recommendation!
Click to expand...
Click to collapse
Can you give me the wiring that you used on your Joying? I ordered one and the box came with Chinese instructions. While the seller attempted to send me an english doc, so far the attempts have resulted in documents that have been too small to be useful.

cranbiz said:
Can you give me the wiring that you used on your Joying? I ordered one and the box came with Chinese instructions. While the seller attempted to send me an english doc, so far the attempts have resulted in documents that have been too small to be useful.
Click to expand...
Click to collapse
I honestly dont remember. I stripped the wires on the stereo and on the remote receiver and was just going to try it one way and if it didnt work, try it the other. It ended up working the first way so I put connectors on the end to make the connection permanent and called it a day. I doubt it would hurt if you had it backwards.
[edit] Obviously red is 12v and black is ground. I used the google translate app to translate the directions, they gave me some info. It uses your phone camera to translate written language.

Problem with MTCE PX5 head unit related to steering wheel keys

Dear community,
I'm kind of lost since I get no support from Erisin about this (no response)
I have a BMW E46 from 2002 and the Erisin head unit.
MCU version is stock px5 MTCE (px5-userdebug 8.0.0. OPR5.170623.007 eng.hct.20180417.101726 test-keys)
I liked the idea of controlling the head unit volume by steering wheel.
Therefore I wired and installed the steering wheel buttons to my car.
The ACC works fine and in general I can control the head unit by the buttons.
Change Volume, Skip a song and so on...
Buuuut very often the head unit goes crazy or the control gets lost over the steering wheel buttons. (I am not able to drive over 30 minutes without having this error)
It seems like the head unit receives some ghost commands and volume goes up to max or I have random song skips. Sometimes it simply doesn't react on buttons.
Of couse this is not usable at all, therefore I disconnected the whole buttons.
For example you see a ghost volume up at 0:27
https://youtu.be/h5rCFSF8pew
Or here there is no reaction on volume up (please excuse my loud breathing)
https://youtu.be/e53De2HQJfY
Key study menu doesn't work at all:
https://youtu.be/Z0wzJsiScSI
Here is magic volume up (you will also see a handsome gangster guy)
https://youtu.be/ZPDQMeU4CNU
I have no clue how to debug or what I can do.
Any hints from the experts?

messiah said:
Dear community,
I'm kind of lost since I get no support from Erisin about this (no response)
I have a BMW E46 from 2002 and the Erisin head unit.
MCU version is stock px5 MTCE (px5-userdebug 8.0.0. OPR5.170623.007 eng.hct.20180417.101726 test-keys)
I liked the idea of controlling the head unit volume by steering wheel.
Therefore I wired and installed the steering wheel buttons to my car.
The ACC works fine and in general I can control the head unit by the buttons.
Change Volume, Skip a song and so on...
Buuuut very often the head unit goes crazy or the control gets lost over the steering wheel buttons. (I am not able to drive over 30 minutes without having this error)
It seems like the head unit receives some ghost commands and volume goes up to max or I have random song skips. Sometimes it simply doesn't react on buttons.
Of couse this is not usable at all, therefore I disconnected the whole buttons.
For example you see a ghost volume up at 0:27
https://youtu.be/h5rCFSF8pew
Or here there is no reaction on volume up (please excuse my loud breathing)
https://youtu.be/e53De2HQJfY
Key study menu doesn't work at all:
https://youtu.be/Z0wzJsiScSI
Here is magic volume up (you will also see a handsome gangster guy)
https://youtu.be/ZPDQMeU4CNU
I have no clue how to debug or what I can do.
Any hints from the experts?
Click to expand...
Click to collapse
You should go Settings/Steering wheel keys to program the SWC, but not go to panel keys study.

I think the key menu doesnt matter. Actually the Buttons work as expected. But it gets out of control very often (random skips, volume up and so on). I also saw a key menu where I See the logs of key press. The head unit seem to actually receive the ghost key strokes repeatedly.

Have you tried entering at the factory menu and changing the car model at canbus menu?
You have a full menu for the keys where to change configurations.
Enviado desde mi iPhone utilizando Tapatalk

Had same problems - like not working buttons, i press up but it volumes up... After latest MCU update seems to be fixed. But also what i did in Steering wheel learning menu dublicated inputs for same buttons. i have on mine and it works without fall since.

Unable to setup on DASAITA PX6, CarPlay steering wheel phone functions buttons

Hello guys:
I am not able to setup the control wheel steering buttons for Phone functions ( pick up a call or end a call) on a DASAITA PX6 10.
On settings I selected CAN BUS
I setup the following commands:
- Increase/decrease Volume---OK
- Mode ( to swap between radio, AV, iPod...)---OK
- Next and previous song---OK
but when I setup the phone setting it is configured but on CarPlay doesn't work, I am no able to pick up the phone.
Any help???
Best regards

What does reseller suggest when contacted for support

My understanding is that there are two ways to connect these units to can bus.
One is with the external vehicle specific can bus boxes, which are not really programmable.
The second is with the key1/2 wires which is internal and are programmable through the key study. I have never used this method, so I know nothing about it... but you could try it.
If all else fails, you can try a PAC can bus adapter.
PAC – Connecting cars and technology. Your total installation solution.
pac-audio.com

Thanks for your replies.
I can program the keys. But what I am not able to program the phone function to work. I assign the functions to the buttons but it doesn’t do anything.
On the other hand the other buttons programmed (increase/decrease volume) works properly

CyrusMzRG said:
Thanks for your replies.
I can program the keys. But what I am not able to program the phone function to work. I assign the functions to the buttons but it doesn’t do anything.
On the other hand the other buttons programmed (increase/decrease volume) works properly
Click to expand...
Click to collapse
Did you setup the keys for just the Dasaita in the unit's settings, or have you also setup the keys in the ZLink app?
I had only done the former and had this problem when I first was trying CarPlay with the ZLink app. What you will need to do is open the ZLink App, without connecting your iPhone to the unit (put it in airplane mode, or leave it in the house far away from your car), then go to Settings within the app. There you will see options to assign the steering wheel keys to the various functions you want for your phone. Once it is all set, you will be able to control CarPlay exactly how you want.
Hope this helps!

SeaMonkey80 said:
Did you setup the keys for just the Dasaita in the unit's settings, or have you also setup the keys in the ZLink app?
I had only done the former and had this problem when I first was trying CarPlay with the ZLink app. What you will need to do is open the ZLink App, without connecting your iPhone to the unit (put it in airplane mode, or leave it in the house far away from your car), then go to Settings within the app. There you will see options to assign the steering wheel keys to the various functions you want for your phone. Once it is all set, you will be able to control CarPlay exactly how you want.
Hope this helps!
Click to expand...
Click to collapse
THANK YOU very much for your help. You solved the problem.
I entered that menu several times and I saw that mapping section but I forgot it completely
now everything is working fine
thanks a lot