[Q] DVR and Steering Wheel Control Questions - MTCB Android Head Units Q&A

So I'm looking into purchasing one of the joying models, and I'm wondering if there is a list of compatible DVR camera's out there. I know that there are 2 logitech camera's that are confirmed working, just wondering if there were any other options.
Also, does anybody know if these stereo's are compatible with the metra axxess RFASW universal steering wheel control addon? I've linked the manual below. Thanks for the help!
http://contentdocs.installernet.com//documents/product/31217.pdf

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[R] Remote control bluetooth music player for steering wheel

Hi everyone,
i'm searching for a remote control working with bluetooth to put it on my steering wheel, to change music from my phone when i'm driving.
Is someone if something like that exist ?
I would like that it looks like this: Click here (but it does'nt work with android phones...)
Thanks in advance
Darkstar2r1 said:
Hi everyone,
i'm searching for a remote control working with bluetooth to put it on my steering wheel, to change music from my phone when i'm driving.
Is someone if something like that exist ?
I would like that it looks like this: Click here (but it does'nt work with android phones...)
Thanks in advance
Click to expand...
Click to collapse
Closed at OP's request as he posted here

Steering wheel forward and back functions not working in other apps

Hey guys
I have the Carjoying deck for my CRV and the steering wheel controls work with the native music app but not with google music or spotify. Anyone know how to fix this ?
Hi bud , I had same problem and couldnt find a fix so bought poweramp player and it works fine . hope this helps
Check the software section. There are services available that intercept the signal and transfer to apps
ludester said:
Hey guys
I have the Carjoying deck for my CRV and the steering wheel controls work with the native music app but not with google music or spotify. Anyone know how to fix this ?
Click to expand...
Click to collapse
Hello, I am new to the forum and the whole head units things, but I had the same issue as you mention. Only worked on default music player, but not others. I downloaded the app RK3066 (available in the app store - can't post outside links, sorry) and it fixed my issue. I have a Klyde unit with the RK3066, from Pumpkin.
When I installed RK3066 I also installed XposedMTC. I'm not sure if it is required to make the steering wheel controls work but these 2 apps made a huge difference on my head unit.
http://forum.xda-developers.com/showpost.php?p=54334741
Hope it helps.
I just downloaded the above app on my quad-core Chinese generic gps/media player in my Touareg and it works a treat. Thanks @francosilva
Fordriver1 said:
I just downloaded the above app on my quad-core Chinese generic gps/media player in my Touareg and it works a treat. Thanks @francosilva
Click to expand...
Click to collapse
Hi Fordriver1, may I know which app did you install, was it RK3066 or XposedMTC or both?.
Thanks.

Problem with steering wheel control

I use original rom rk3188 and steering wheel control doesnt work with spotify music app. When i used malaysk rom its work but its too slow. Pls help me. Thx
nic39.41 said:
I use original rom rk3188 and steering wheel control doesnt work with spotify music app. When i used malaysk rom its work but its too slow. Pls help me. Thx
Click to expand...
Click to collapse
You need SpotifyKeys. Get it HERE.
Or use modeswitch
https://forum.xda-developers.com/an...t/app-modeswitch-spotify-swc-control-t3310966

PX5 Steering wheel controls

Hello All,
I have an Audi A3 with an Xtrons PX5 MTCD based head unit and I’m struggling to figure out how I can amend what the buttons do as standard. The reason I’m wanting to adjust it as I’m fitting a steering wheel with more buttons and I’d like to be able to set custom options if at all possible.
I have it rooted with Hal9k mod installed but it still doesn’t let me do much.
Can someone please point me in the right direction?
Thanks very much!

HD Radio and Satellite Radio

I wanted to talk about my software and hardware project to share it. I started with a Parrot Asteroid Smart running Android 2.x and when that was disappointing moved on to the Chinese units. I started early on with added circuitry/apps. Now I have a PCB connected to the HU by USB, with an ESP32 and an Arduino Micro. I do software updates to the ESP32 over a Zigbee.
The purpose of all this is to add on HD and XM. For HD I am using the (obsolete) Directed tuner, which connects via a mini-din plug, 12v power, and RCA audio jacks. I also support connection to SiriusXM over a mini-din cable. Unfortunately I am not on the very latest version of XM as the protocol is not publicly known. I'm using a docking station with a Starmate, which is advanced enough to support rewind/replay on the current channel. One could argue this is pointless since XM has an app now, my main arguments are that the app does not have an API and it does have data charges..
I programmed the ESP32 with the NanoFramework o/s in C#. The Arduino's purpose is to emulate an HID keyboard.
Besides the HD and XM I implemented advanced steering wheel button features which are vehicle specific.
I also interfaced a compass module. My code has an anti-jamming feature; if the magnetic field is out of range it switches to gyroscope (6 DOF).
I don't know if I want to open-source this and/or sell it. I could not have developed it without XDA.
The xm app also does not work without a data connection either. On real satellite you can get it anywhere, anytime.
I ran XM for a while with a simple external tuner connected to the head unit's rca inputs. Worked fine and did not need a data connection.
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I have my own gui for the tuner. Nothing fancy, and I tune by the steering wheel buttons. It cuts out sometimes on mountain roads. My car came with a satellite antenna. I think the latest xm tuners sound better.
Here's a better picture.
I am trying to upload the screenshot one more time.
I have to Hd radio to play with, the directed version and the zoom one, i wanted to know if there is an gui for android ... car radio or not, like trying them on android platforms ???
thks
xdamember2 said:
I wanted to talk about my software and hardware project to share it. I started with a Parrot Asteroid Smart running Android 2.x and when that was disappointing moved on to the Chinese units. I started early on with added circuitry/apps. Now I have a PCB connected to the HU by USB, with an ESP32 and an Arduino Micro. I do software updates to the ESP32 over a Zigbee.
The purpose of all this is to add on HD and XM. For HD I am using the (obsolete) Directed tuner, which connects via a mini-din plug, 12v power, and RCA audio jacks. I also support connection to SiriusXM over a mini-din cable. Unfortunately I am not on the very latest version of XM as the protocol is not publicly known. I'm using a docking station with a Starmate, which is advanced enough to support rewind/replay on the current channel. One could argue this is pointless since XM has an app now, my main arguments are that the app does not have an API and it does have data charges..
I programmed the ESP32 with the NanoFramework o/s in C#. The Arduino's purpose is to emulate an HID keyboard.
Besides the HD and XM I implemented advanced steering wheel button features which are vehicle specific.
I also interfaced a compass module. My code has an anti-jamming feature; if the magnetic field is out of range it switches to gyroscope (6 DOF).
I don't know if I want to open-source this and/or sell it. I could not have developed it without XDA.
Click to expand...
Click to collapse
Sounds amazing. Any chance you can share with us how exactly you did it. A DIY thread would be very much appreciated
AlexViean said:
Sounds amazing. Any chance you can share with us how exactly you did it. A DIY thread would be very much appreciated
Click to expand...
Click to collapse
I will happily answer any questions. No time to explain everything, and it depends on the specific HU and car. I could share my pcb schematic and code I'm running on the ESP32, Arduino Micro Pro, and Android HU. The ESP32 code includes interfaces for the Directed HD and Sirius XM plus a Wit- Motion compass sensor, in C# running in NanoFramework. The HU code is one package in C# (Xamarin). Currently I'm not using the steering wheel inputs of the HU, I found the calls for volume control functions. And I am now using Automate instead of Tasker for miscellaneous purposes. I added a db-15 connector to the HU's harness for all my needs. I learned SMD assembly on this project.
xdamember2 said:
I will happily answer any questions. No time to explain everything, and it depends on the specific HU and car. I could share my pcb schematic and code I'm running on the ESP32, Arduino Micro Pro, and Android HU. The ESP32 code includes interfaces for the Directed HD and Sirius XM plus a Wit- Motion compass sensor, in C# running in NanoFramework. The HU code is one package in C# (Xamarin). Currently I'm not using the steering wheel inputs of the HU, I found the calls for volume control functions. And I am now using Automate instead of Tasker for miscellaneous purposes. I added a db-15 connector to the HU's harness for all my needs. I learned SMD assembly on this project.
Click to expand...
Click to collapse
I'm not sure if using a single din radio would be technically easier to get SiriusXM but it's significantly big for a sedan dash if there's an existing android head unit. Have you considered modifying one of those portable tuners like an Onyx Plus instead?
AlexViean said:
I'm not sure if using a single din radio would be technically easier to get SiriusXM but it's significantly big for a sedan dash if there's an existing android head unit. Have you considered modifying one of those portable tuners like an Onyx Plus instead?
Click to expand...
Click to collapse
Yes actually I'm already doing something like that now. I got tired of the extra radio just for Satellite. Now I have one of the small SiriusXM units in a docking station. It connects to my PCB with a 9-pin mini-din. The nice thing about it is the tuner unit supports replay.
xdamember2 said:
Yes actually I'm already doing something like that now. I got tired of the extra radio just for Satellite. Now I have one of the small SiriusXM units in a docking station. It connects to my PCB with a 9-pin mini-din. The nice thing about it is the tuner unit supports replay.
Click to expand...
Click to collapse
Would you mind sharing some pictures of your setup and a video showing how things work would be really informative
AlexViean said:
Would you mind sharing some pictures of your setup and a video showing how things work would be really informative
Click to expand...
Click to collapse
Here's a simplistic block diagram of my setup. Does not show the power connections.
xdamember2 said:
Here's a simplistic block diagram of my setup. Does not show the power connections.
Click to expand...
Click to collapse
Here is a brief video of my audio sources. My HD tuner is not plugged in today.
This is really cool. I want to replicate what you have for my Joying Android head unit, but I don't have the needed skillset unfortunately. Are you interested in making and selling your interface? You can order a small run from company like https://www.pcbway.com/b (no affiliation, just some company I found on internet). I will buy one from you!
xdamember2 said:
Here is a brief video of my audio sources. My HD tuner is not plugged in today.
Click to expand...
Click to collapse
I'd love something like this for my linkswell gen 4. The one thing I really really miss is the HD radio from the oem unit. For sirius xm I've been more than happy with the app. But HD radio is another story and apps like Audacy are garbage and don't have all the HD stations in my area.
xdamember2 said:
Here is a brief video of my audio sources. My HD tuner is not plugged in today.
Click to expand...
Click to collapse
For sure I'd pay you for this interface. In the meantime trying to pickup one of those old directed hd car tuners as I have an aux input. Obviously I'd prefer what you're doing, a complete interface controlled by the radio screen, not the controller that comes with these things.
AlexViean said:
I'm not sure if using a single din radio would be technically easier to get SiriusXM but it's significantly big for a sedan dash if there's an existing android head unit. Have you considered modifying one of those portable tuners like an Onyx Plus instead?
Click to expand...
Click to collapse
I'm now running a Sirius Commander Touch as the satellite tuner. But I'm stuck on the graphics. I see the PNG data but it's split at about 1000 bytes.
Still running the added functions on an ESP32 but I switched from nanoframework c# to Arduino c++.
Update: now my difficulty is identifying which image goes with which channel.
If anyone is interested I am going to sell the new old stock HD tuner I bought on ebay and the cable I bought from xdamember2. Indeed it works perfectly but I'm getting rid of the radio so I no longer need these parts. I actually had this running on a linkswell gen 4.
xdamember2 said:
I'm now running a Sirius Commander Touch as the satellite tuner. But I'm stuck on the graphics. I see the PNG data but it's split at about 1000 bytes.
Still running the added functions on an ESP32 but I switched from nanoframework c# to Arduino c++.
Update: now my difficulty is identifying which image goes with which channel.
Click to expand...
Click to collapse
Things are mostly working now. Some problem with the jpeg album artwork and jpeg repair tools have been no help.
Hey there! Did you ever happen to get information on the protocol used by the SXV series of sXM tuners? Does the Commander use one of the siriusxm control protocols?
I have an older Sirius Stratus tuner with a lifetime subscription on it that works with mini din 8 / sirius connect control, and my head unit (a newer kenwood android auto thing) has the 10-pin interface.
I've ordered a used SXV100 to experiment with, and to steal the custom cable from, but as you mentioned the protocol, and even the pinout, is proprietary and unpublished, so for the moment i'll be flying blind.
I'm hoping that at least I can identify the pins and will ideally find a +5v power, ground, audio left, right, audio ground, control rx/tx as is there for the old 8pin sirius interface, and that i'll just need to build a translation circuit from sirius connect to sxm control...

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