No external canbus decoder box on newer PX5 HUs? - MTCD Android Head Units Q&A

Hi MTCD community.
Thanks to the time between the years (that's how we call December 27th to 31st in Germany), I had time to upgrade my HU. Up to now I had a RK3188 quad-A9 one (Erisin ES2508B, KGL) that had a proprietary power connector and a external canbus decoder box. (more information here: http://vi.vipr.ebaydesc.com/ws/eBay...descgauge=1&cspheader=1&oneClk=1&secureDesc=0 )
That external canbus decoder of the unit has a few dedicated output pins for illumination, reverse gear and a UART (?) style digital RX/TX connection to send wheel-button key commands. It's a perfect example for a Chinese product. This solution it easy and works - almost:
On Mercedes cars the wheel-buttons are used to steer the so called Kombi (KI). KI and HU are connected via canbus. Key commands are send in one specific can-message. The canbus decoder box is said being made specifically for Mercedes cars. While it correctly decodes button presses it fails to decode the current KI menu. As a result the HU will always interpret the "prev./next" buttons, even when you're not in the KI's Audio menu. As a result you either stop using your KI (bad option) or you disable some keys in the HU (that's what I did). The decoder box is also only reading the canbus and thus not able to send audio titles or the current radio frequency/station name to the KI.
Because of the decoder box sitting between HU and KI I never tried to enhance functionality because that would have ment either connecting another R/W canbus dongle to the HU or replacing the chinese decoder box and reverse engineering the RX/TX communication between decoder box and HU.
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The newer PX5 unit that I now own (Erisin ES7689C, KGL?/LM?, http://www.ebay.co.uk/itm/Android-8...s-W203-W209-/123151147422?hash=item1cac61619e ) has a Quadlock connector (that's the correct name for the multi pin connector that became popular on HUs beginning in the early 2000th) and no external canbus decoder box (it is indeed perfectly plug'n'play). It is also able to identify itself to the KI as Radio which means it is also writing to the canbus. Compared to an original OEM HU, information is still extremely limited and it again fails to interpret only wheel-button commands send from the KI's Audio menu. - But, it is able to write to the canbus, so potentially this is a much better starting point for enhancements.
Now the key question: Does anyone know how the HU is communicating with the canbus? Is the decoder box just inside the HU's housing (and again being an extra translation module) or is it a proper canbus device controlled by an app or service from inside the HUs android?

Good piece of info mate. Thanks a lot
Unfortunately i am not able to answer the question due to limited knowledge.
I own a Mercedes w164 and have the same issues and i am keen to find a solution. Open a thread for that too here > https://forum.xda-developers.com/an...t/adapter-help-mercedes-t3903165#post79005544
My MTCD idetails are :
Unit: MTCD PX5
MCU: MTCE_GS_V3.00_3
ROM: Halk9 Mod 3.1 (Android 8)
Can Adapter : GS 10280514 / HW:V2 SW:V3
Can adapter Setting: 23 Benz_B200(simple)
On another thread more HW related you can find pleanty of info >
https://forum.xda-developers.com/an...elopment/mercedes-benz-class-comfort-t3680320
Also this guy did some work on canbus : http://honeysw.com/canproject.php
and here another piece of info : https://forum.xda-developers.com/an...-units-qa/how-bus-messages-make-unit-t3352343

Hi I also have a MB lol, a w203.
I have been through several head units of types makes etc, so know exactly what you mean. Although I never heard of 'ki' before.
My latest unit I have is def very good (best was a pioneer with separate car-pi can decoder) and that is also an erisin.
Great minds an all that eh!
The unit I have is a 4/32gb android 8. MTCE. It was working very well until I developed a problem with my reverse camera signal not getting picked up. Was switching OK but no image??
Anyway I bit the bullet and installed the custom rom by Malaysk which helps the camera but no steering control (for me) on 3rd party apps.
There is some talk about mtce files etc but I couldnt get anything to work until I installed a brilliant prog called mtcdtools (free from github).
Very techy to understand / use but with the info and help from others managed to replicate enough to get the two up/down left buttons working perfectly on all apps. It starts up by itself and stays in background. I'm very pleased with result and sure it could do much more if i only knew how. Def give it a go.
Also the up/downs only while in the audio sub menu and they operate whichever music app is running even while in the background if that makes sense. The right volume buttons always worked anyway, and with the phone.
I think the real challenge now will be getting info in the dash display to correspond with what ever app is on top. Currently mine just says audio off when using dab, but displays station number in radio and time elapsed from music player., but nothing from nav.

Related

MTCD KGL PX5 - CanBus problem with VW Golf 6

Hi i've two problem with CanBus on Vw Golf 6.
1. If i open APP for steering weel config i can't see any button and i can't configure anything
2. Doors open/close don't work. I can see Temperature, Oil, RPM but doors doesn't work at all
I've this problem with my actual PX5 KGL and with my old RK3188 unit
Details of my actual unit:
Type KGL
MCU 2.47
ROM Malaysk PX5 2.0
capu81 said:
Hi i've two problem with CanBus on Vw Golf 6.
1. If i open APP for steering weel config i can't see any button and i can't configure anything
2. Doors open/close don't work. I can see Temperature, Oil, RPM but doors doesn't work at all
I've this problem with my actual PX5 KGL and with my old RK3188 unit
Details of my actual unit:
Type KGL
MCU 2.47
ROM Malaysk PX5 2.0
Click to expand...
Click to collapse
1) car specific headunits which Steering wheel buttons control are based on Canbus Box CAN NOT BE MAPPED by the Steering Wheel APP. They are hardcoded to specific Headunit functions. There is a tool MTCDTools from @f1x that could help you to assign new functionalities to your SWC buttons.
2) I don't know why do you report it as a problem. It was promised to you that Doors Opening/Closing shall be working with the canbus box supplied? Each Can-Bus Box is capable to decode specific features of the car. If that functionality was not present on PX3 or PX5 is due to your can-bus CAN'T DECODE (or has not been programmed to decode) the open/close door system.
The CarSettings app just receive which functions are being decoded by your can-bus and show the decoded information received.
Can you point me to the location of the CarSettings app? I can't find it in my newly installed headunit. I couldn't find any in the Google play store.
I found a fix for you problem, capu81, you need to go to factory settings, Canbus and try to change the can bus setting with some other value. The can bus box has the ability to decode some dozen car types, and it's probably not set for your car properly. When this setting is done right the apps that everyone is looking for, the Car info and Car settings are going to be available and should contain all the old settings that were available on your factory head unit. The default password for accessing factory settings is usually 126.
And if the canbus decoder is not supporting your vw golf 6, then go to roadnavi and buy their CAN-bus Decoder and select the right model. Eg: RN Model: C257 Golf 7
Thank you to all for the answer.
The doors signal is not a big problem, l leave it in this way.
Steering Well remapping: with MTCD Tools i can create custom action. For example: i've button for MUTE. If i remap button with MTCD Tools and assign Vocal Google Search to it the action is fine but MTCD became MUTE. There is a way to disable factory action and use only MTCD Action?
I have this problem too (no mapping option) but my steering wheel works on my Ford Focus. Check your CAN Bus box and make sure the model of it matches what's selected in Factory Settings. My CAN Bus box is a Raise 06, likewise it is selected in Factory Settings to match it.
@capu81 I am having this same issue with my doors on my Erisin ES6405V. Currently emailing with Erisin back and forth trying to get this fixed. If there is ever an outcome, I will let you know.
capu81 said:
Thank you to all for the answer.
The doors signal is not a big problem, l leave it in this way.
Steering Well remapping: with MTCD Tools i can create custom action. For example: i've button for MUTE. If i remap button with MTCD Tools and assign Vocal Google Search to it the action is fine but MTCD became MUTE. There is a way to disable factory action and use only MTCD Action?
Click to expand...
Click to collapse
I have same exact issue. Did you find a solution to it?
Hello, I have the exact same problem only the other way around, my steering wheel buttons are mapped and working, car is showing open/closed doors but for oil, rpm, speed battery nothing. I tryed messing with the canbus setup and change to other setting from VWto maybe get it to work but no luck. Any ideas on how I can solve this? I have a MTCD unit px3 2GB 7.1.2
I have also problem with CANBus decoder. The only problem is that when i drive and change shift activate rearview camera, all the other stuff (swc, door signals and also reverse enable the rear view camera) works fine. There is something like update or a settings that works fine. I have a FIAT Bravo model >2007 and in factory settings seems to be all ok
dirty_dty said:
Hello, I have the exact same problem only the other way around, my steering wheel buttons are mapped and working, car is showing open/closed doors but for oil, rpm, speed battery nothing. I tryed messing with the canbus setup and change to other setting from VWto maybe get it to work but no luck. Any ideas on how I can solve this? I have a MTCD unit px3 2GB 7.1.2
Click to expand...
Click to collapse
j0nnymoe said:
@capu81 I am having this same issue with my doors on my Erisin ES6405V. Currently emailing with Erisin back and forth trying to get this fixed. If there is ever an outcome, I will let you know.
Click to expand...
Click to collapse
These are not "problems" - CAN Bus support depends on your car model, the manufacturer of the CAN Bus box and whether MTC/HCT have written the software for these things. If youve played araound with all the CAN Bus settings and not every function works then there is nothing you can do . . . apart from get hold of the CAN Bus protocol for your vehicle,, the MTCD MCU protocl and then write and app for it. There are 1000s and 1000s of cars on the market (and 1000s no longer made) it would be far too costly to make full CAN Bus support for EVERY car on sale, so only the most popular cars are supported and even then not all models and/or all functionality.
@j0nnymoe - dont waste your time contacting Erisin, they are a seller not a manufacturer and theres nothing they will be able to do.
@typos1 do you think maybe it can be fixed if I update the MCU to the latest version? It just seam strage for it to work in open/closed doors but not for the rest, I'm thinking maybe a mismatch of canbus and software and maybe that is why it dose not work. (Just a wild guess)
dirty_dty said:
@typos1 do you think maybe it can be fixed if I update the MCU to the latest version? It just seam strage for it to work in open/closed doors but not for the rest, I'm thinking maybe a mismatch of canbus and software and maybe that is why it dose not work. (Just a wild guess)
Click to expand...
Click to collapse
Updating the MCU may certainly help.
@typos1 that is good to know, I can keep my hopes high for a bit longer but I am sceptic about the MCU update [email protected] gave me.. He did not test it and there is nobody else I could find that updated to the latest version of XRC to confirm it is the right one.
dirty_dty said:
@typos1 that is good to know, I can keep my hopes high for a bit longer but I am sceptic about the MCU update [email protected] gave me.. He did not test it and there is nobody else I could find that updated to the latest version of XRC to confirm it is the right one.
Click to expand...
Click to collapse
What do you mean "the right one" ?
If you remember on the other thread, he just attached a dmcu file of the latest MCU for my XRC unit and said he did not tested it.
dirty_dty said:
If you remember on the other thread, he just attached a dmcu file of the latest MCU for my XRC unit and said he did not tested it.
Click to expand...
Click to collapse
I cant see any reason to doubt him.
@j0nnymoe - dont waste your time contacting Erisin, they are a seller not a manufacturer and theres nothing they will be able to do.
Yea I gave up on that a while ago. I've had a couple of these units before from other sellers (xtrons/eonon) and the canbus on those units worked fine. I suspect the KGL unit's doesn't like my car for some reason. I toyed with the idea of getting another canbus decoder..maybe if I can get one cheap enough I might try it.
j0nnymoe said:
@j0nnymoe - dont waste your time contacting Erisin, they are a seller not a manufacturer and theres nothing they will be able to do.
Yea I gave up on that a while ago. I've had a couple of these units before from other sellers (xtrons/eonon) and the canbus on those units worked fine. I suspect the KGL unit's doesn't like my car for some reason. I toyed with the idea of getting another canbus decoder..maybe if I can get one cheap enough I might try it.
Click to expand...
Click to collapse
Did you try another canbus decoder?
I've got an a3 and I'm using a kgl unit and nothing shows on my dis screen on the dash but when I've had a unit from xtrons before that did work.. I'm guessing kgl must use cheaper canbus decoders and I've been thinking like you and we're thinking of buying another decoder from xtrons to try

MFD display in VW-group cars

Question for VW, Skoda and Seat owners: Is there anybody here who is able to get their MTCD unit to show things like radio station frequencies on the build in MFD display? I have a Skoda Yeti (technically similar to Golf VI) and I am not able to make my MTCD unit with Malaysk 4.0 show these things on the MFD. Previously I had a Ownice C500 and that unit was actually able to show a compass on the MFD. I have seen pictures on an russian forum from a guy who could see radio frequncies on his Seat MFD (I think it was from a MTCB unit) . I am looking for a hint as to what settings I need to change in the ECU with my VCDS equipment. Thank you in advance.
Regards
Kurt Lund
Kurt Lund said:
Question for VW, Skoda and Seat owners: Is there anybody here who is able to get their MTCD unit to show things like radio station frequencies on the build in MFD display? I have a Skoda Yeti (technically similar to Golf VI) and I am not able to make my MTCD unit with Malaysk 4.0 show these things on the MFD. Previously I had a Ownice C500 and that unit was actually able to show a compass on the MFD. I have seen pictures on an russian forum from a guy who could see radio frequncies on his Seat MFD (I think it was from a MTCB unit) . I am looking for a hint as to what settings I need to change in the ECU with my VCDS equipment. Thank you in advance.
Regards
Kurt Lund
Click to expand...
Click to collapse
do you see anything on the MFD when using the original Bolero/Columbus/Amundsen?
If yes, then you don't need VCDS coding, the canbus adapter and MCU should do the job. I didn't try it on mine, i will do so later today and post results.
...and latest Malaysk is 11.5, not 4.0 btw
zerozoneice said:
do you see anything on the MFD when using the original Bolero/Columbus/Amundsen?
If yes, then you don't need VCDS coding, the canbus adapter and MCU should do the job. I didn't try it on mine, i will do so later today and post results.
...and latest Malaysk is 11.5, not 4.0 btw
Click to expand...
Click to collapse
I never had an original radio which was able to send information to the display. I tried various setiings in VCDS to see if I could enable something, but to no avail. Thank you in advance for looking.
Regards
Kurt Lund
BTW: The latest ROM for MTCD HU with PX5 processor from Malaysk is 4.0. 11.5 is for older type of HU.
Kurt Lund said:
Question for VW, Skoda and Seat owners: Is there anybody here who is able to get their MTCD unit to show things like radio station frequencies on the build in MFD display? I have a Skoda Yeti (technically similar to Golf VI) and I am not able to make my MTCD unit with Malaysk 4.0 show these things on the MFD. Previously I had a Ownice C500 and that unit was actually able to show a compass on the MFD. I have seen pictures on an russian forum from a guy who could see radio frequncies on his Seat MFD (I think it was from a MTCB unit) . I am looking for a hint as to what settings I need to change in the ECU with my VCDS equipment. Thank you in advance.
Regards
Kurt Lund
Click to expand...
Click to collapse
I have a SEAT Leon and a MTCD PX5. It only shows the radio station, but not the RDS info. If I use the music app or the bluetooth app the MFD only shows the number of the song but not the tags (name, artist, etc.) As I understand, it is something with the canbus.
Kurt Lund said:
I never had an original radio which was able to send information to the display. I tried various setiings in VCDS to see if I could enable something, but to no avail. Thank you in advance for looking.
Regards
Kurt Lund
BTW: The latest ROM for MTCD HU with PX5 processor from Malaysk is 4.0. 11.5 is for older type of HU.
Click to expand...
Click to collapse
a, ok i assumed u had a PX3
I have a 2010 GTI. Replaced the original radio with an MTCD.
Previously, my MFD would show compass direction (N, NE, E, SE, ect) next to the clock and I would also have a radio station section. After installing the MTCD, the compass would turn on, set to North, correct to the actual direction, then turn off again. It was a continuous 5 second cycle of this. I asked around on other forums and finally found that it just wouldn't work. One person just pulled out the compass unit. That's what I ended up doing. It doesn't bother me to not have it there if I'm just going to have navigation on my HU anyway.
For the radio, honestly, I never used the function on the MFD. It was easier to just cycle the presets using the steering wheel controls or pressing the button on the HU instead of changing to the radio function and scrolling through the list.
Troggie81 said:
I have a 2010 GTI. Replaced the original radio with an MTCD.
Previously, my MFD would show compass direction (N, NE, E, SE, ect) next to the clock and I would also have a radio station section. After installing the MTCD, the compass would turn on, set to North, correct to the actual direction, then turn off again. It was a continuous 5 second cycle of this. I asked around on other forums and finally found that it just wouldn't work. One person just pulled out the compass unit. That's what I ended up doing. It doesn't bother me to not have it there if I'm just going to have navigation on my HU anyway.
For the radio, honestly, I never used the function on the MFD. It was easier to just cycle the presets using the steering wheel controls or pressing the button on the HU instead of changing to the radio function and scrolling through the list.
Click to expand...
Click to collapse
I agree it is not the worlds most important function, but it irritates me that I cant get it to work anyway. Your GTI from 2010 has exactely the same ECU as my Skoda as far as I know so it ought to work.
What do you mean by "just pulled out the compass unit"? Physically took something out?
Regards
Kurt Lund
Kurt Lund said:
I agree it is not the worlds most important function, but it irritates me that I cant get it to work anyway. Your GTI from 2010 has exactely the same ECU as my Skoda as far as I know so it ought to work.
What do you mean by "just pulled out the compass unit"? Physically took something out?
Regards
Kurt Lund
Click to expand...
Click to collapse
Seems like there are always going to be little things you have to ignore when you go with non OEM electronics. I'm pretty picky about stuff, but I can let the radio go.
Yep, the compass module in my car is in the rear headliner. Just Googled it and found this video: https://www.youtube.com/watch?v=mw1T7oqiQsw
@Kurt Lund i checked on mine and in the "audio" menu it shows the FM frequency of the station playing (when in radio mode) and track# and mm:ss (when in default built-in music player mode). If i use poweramp it shows just "Video" input on the MFD, no track or counter info. I don't see a compass on the MFD since i didn't have an OEM navigation setup beforehand.
zerozoneice said:
@Kurt Lund i checked on mine and in the "audio" menu it shows the FM frequency of the station playing (when in radio mode) and track# and mm:ss (when in default built-in music player mode). If i use poweramp it shows just "Video" input on the MFD, no track or counter info. I don't see a compass on the MFD since i didn't have an OEM navigation setup beforehand.
Click to expand...
Click to collapse
The compass on mine always showed up as just letters next to the time. So, the very top would have something like "NE 5:34" or "S 6:20". There was also a calibration option in the MFD setup menu. Selecting calibration would require you to drive in a circle. I also didn't have a factory nav unit.
Is there a fix to this yet ? I installed a MTCD unit on my vw touran 2006 and at first (1-2 days) the MFD displayed Audio but no information.. that was not a problem since I could atlist use the buttons on the steering wheel to change the songs anyway.. but afther that the Audio from MFD dissapeared and the onky way I can change the songs are from the HU. (compas also dissapeared).
dirty_dty said:
Is there a fix to this yet ? I installed a MTCD unit on my vw touran 2006 and at first (1-2 days) the MFD displayed Audio but no information.. that was not a problem since I could atlist use the buttons on the steering wheel to change the songs anyway.. but afther that the Audio from MFD dissapeared and the onky way I can change the songs are from the HU. (compas also dissapeared).
Click to expand...
Click to collapse
anyone got a fix for this. i just got some zeroes in 2013 t5 when using dab or bluetooth audio.
If anyone is wondering, we can display on MFD using CanBus.
We can find adresses to write on internet: https://docs.google.com/spreadsheets/d/1eirT8LbSRl4j06BpwgsiE4PM_2BGH9UStdWLXwKvHJw
If someone is able to take info from android and send them through canbus you should display everything as original.
Here is a MFD compatible Head unit: http://m.cardvdstereos.com/android-8-0-car-dvd-player-vw-mqb-universal
If you ask for firmware of these unit you should maybe able to look how it works.
I looked at this. I had a windows CE head unit and that could display the MFD compass heading, so I know it should be possible with a non-VAG head unit. Looking at VCDS information it seems that compass information can be put onto canbus by either the head unit or a compass module. Cars without a VAG satnav such as the Columbus, would have a compass module instead, usually fitted in the top of the tailgate/boot/trunk.
So theoretically if you want the MFD compass and your MTCE head unit isn't putting the data on the canbus you could install a VAG compass module to do this. It would require VCDS coding to setup though; to register the compass module.
From what I've read it doesn't seem as if any MTCE head units put this compass data on the canbus; though there seems no reason why they shouldn't be able to do this. I would guess that it wouldn't even need a firmware mod, but could be managed in software.
UnReal' said:
If anyone is wondering, we can display on MFD using CanBus.
We can find adresses to write on internet: https://docs.google.com/spreadsheets/d/1eirT8LbSRl4j06BpwgsiE4PM_2BGH9UStdWLXwKvHJw
If someone is able to take info from android and send them through canbus you should display everything as original.
Here is a MFD compatible Head unit: http://m.cardvdstereos.com/android-8-0-car-dvd-player-vw-mqb-universal
If you ask for firmware of these unit you should maybe able to look how it works.
Click to expand...
Click to collapse
Interesting links! I'm really looking for something like this as well, but not with Android 8.1
I'm wondering how they've implemented this in the software. Is it like a driver for a system app or just a normal app?
I'm a developer myself and I feel like I can add this myself. I'm not sure though if I can just send whatever data I want over canbus via Android? Would be great to write some software for all of the VAG users here that have an Android unit so their MFD are fully working again.
I'm thinking of: Fully working navigation with the compass and the instructions, full working media display (FM, DAB, BT).
Bose321 said:
I'm thinking of: Fully working navigation with the compass and the instructions, full working media display (FM, DAB, BT).
Click to expand...
Click to collapse
That would be GREAT! I'm not a developer and an app like this would be awesome for me!
When I switched to Andorid unit instead of original unit, I completely lost any info from my unit to MFD: radio, compass, navigation, etc.
I unfortunately no longer have an Android unit in my car, so I would first have to find something for that and start programming on it. Is there any other interest in starting a project like this?

CAN adapter - Help needed (Mercedes)

Hi All,
I need to find some info for the Can adapter so i can fix my issue and help other people with similar problems too .Owner of an MTCD PX5 unit, specific for Mercedes ML (W164) that came with the Can adapter.
From day one the steer wheel buttons worked (vol up/down, phone) and reverse camera out of the box BUT i had no vehicle info at all (door opened, fuel level, temperature, parking sensors etc) as many of the users especially on VW units have. The car is a 2010 model therefore the canbus info should be plenty. Tried all the combinations of CanBus under the extra settings with no luck.
One think i noticed is that i had NO Vehicle.apk or microntek apk and MTCCanbus.apk installed on the unit. I tried to install but installation was failing for both. Even copying to system/app/** didn't worked.
Any idea ?
BTW Anyone knows what is the Knob Mode under extra settings ? Mine is set to : 2 10k/20K ADC Ports
Details:
Unit: MTCD PX5
MCU: MTCE_GS_V3.00_3
ROM: Halk9 Mod 3.1 (Android 8)
Can Adapter : GS 10280514 / HW:V2 SW:V3
Can adapter Setting: 23 Benz_B200(simple)
Hi, i have the same car the same headunit and the same problem.
All is fine but i want to have more can-informations/functions.
zollaki said:
Hi, i have the same car the same headunit and the same problem.
All is fine but i want to have more can-informations/functions.
Click to expand...
Click to collapse
Good to know that this is a generic issue and not specific to my unit and car. It seems a lot of people with Mercedes cars have similar problems. I wonder if this is related with the cheap implementation of the Chinese Can adapters or related with the car.
Will keep searching
Another thread is open with more technical details for similar issue, more HW oriented though here > https://forum.xda-developers.com/android-auto/mtcd-discussion-questions-development
I have the same car w164 and px5 android 8
The same problem.
No I have more problems the canbas stop working no reverse camera no Wheel key vol working and no led light on unit key, I think my canbus dead ?

For W211/203 owners with Headunits - I've ported MBUX with full CAN data to android!

This has been a little lockdown project for myself.
DISCLAIMER: I am not responsible for ANY distractions caused by the shiny new interface, or any bricking of peoples tablets caused by flashing a custom ROM!
For those who don't know, MBUX is the new UI design language that Mercedes uses in the W205 models and up.
I decided to have a go at porting the interface to my MTCE tablet, using assets pulled from reverse engineered cluster firmware for the W213 E class.
Currently, this application works as a new home launcher, being the exclusive application running on the device. There is no way to browse other applications currently (I need to integrate that into the interface), however, it decodes data from CANBUS, and displays a TON of information!
Limitations currently (Early developement)
1. Volume controls and brightness doesn't work. We are bypassing the stock headunit canbus decoder box! (Reasons below)
2. The app will crash on first launch due to USB permissions
Current data shown on interface
1. Fuel data (Consumption per second, Average + Current MPG)
2. Transmission status for 722.x transmissions - Gears, oil temp, Torque converter status and more
3. Climatronics data (Get to see interior and exterior temps, as well as current fan speed, AC work load, Refrigerant pressure, flap statuses)
Future additions
1. Sending track data to Instrument cluster display - full name supported, as well as play duration
2. Phone support on IC display (Show current caller name, as well as call duration)
3. LOADS more sensor data - I have full access to every module on the cars as well as all the messages on canbus and their containing data!
4. Possible 0-60 lap timer?
5.
Why bypass the stock canbus box?
1. The stock decoder box with headunits spam data to the instrument cluster. I've reverse engineered the cluster protocol in these cars, so i can display a lot more text on the display!
2. The stock decoder box triggers the headunit to force show the reverse screen when the car is in reverse. I want the app to be in control of what happens, not the headunit.
3. The arduino required for this project talks to BOTH Canbus C and B, so no need for the headunits own box (Which i found out was filtering data)
What you'll need to try it
1. Malysk ROM installed (Root is required to run it, and Malysk has WIFI ADB debugging enabled for ease of development!)
2. Arduino Uno with 2x CANBUS shields (We will bypass the Headunits own canbus box for our own!
3. Suitable wires for running the Arduino to the 2 CAN systems on the car (see below)
Installation
1. Connect your Arduino to CANBUS C. I have 2 wires running to behind the instrument cluster. These plug into the 2 green wires on the cluster harness (Green is CAN L, Green+White is CAN H):
2. Connect your Arduino to CANBUS B. I have 2 wires running to the hub connector, accessible by removing the panel on top of the driver's pedals. (Brown is CAN L, Brown+Red is CAN H)
3. Connect your Arduino to a laptop, and upload the code found in UNO_CODE in the code repository
4. Connect the Arduino to the headunit with a USB cable.
5. Compile and upload the APK to the headunit, and choose "MERCEDES UI" as your new home screen.
6. Enjoy!
Code repository: https://github.com/rnd-ash/MBUX-Port
Ha - you the man.
First project Ive come across for my car.
However couple of Qs.
1, what is this project for, just to display car info with MB launcher?
I know this is good but without normal control of headunit apps there's not much point.
Could you not easily achieve the same with torque and a similar launcher thats similar
.
2nd. My px5 has a built in canbus, no way to bypass or disable it. Could it still work with the limitations / further research?
Does this have to be run on malaysk rom. Can it not be run as an app or on Hal9ks?
Anyway fantastic news and well done for having a go. Let me know if I can test anything for you.
203 or 211?
Currently, it's still in early stages! But I've been documenting it all on twitter: https://twitter.com/rndashm/status/1286652539337940992?s=19
You can disable canbus. If your using the factory harness (big black thing with loads of wires going out of it), what I did was to simply tape up the male canbus pins on the headunit, so they don't make contact
And as for using existing canbus. No you have to use a dedicated shield. The MTC headunits seem to filter a ton down by the time the Android OS connects to the MCU controller, so there is hardly anything useful there to see. Not to mention that same onboard MCU controller spams canbus with messages for the instrument cluster display from power on, and can't be turned off. Hence I had to bypass that as well in order to render text on the instrument cluster display (I plan to show track names playing on the AUDIO page and, if you have the telephone page, allow you to dial a contact from there! (Ive done this with a prototype project on my GitHub account called W203-Canbus).
For now, I don't think you can test anything as such but I suggest you get some wires ready for both can B and can C, and buy an Arduino Uno and 2x canbus shields
Great Job !!!
I was desperately looking for CANBUS related info for my use case on a mercedes car (2009 W164) where i receive very limited CANBUS info and found this thread.
Comparing folks with Audi/VW/SKODA where they are able to see pleanty of info (AC, Parking Sensors, door open etc) with my situation on a mercedes vehicle made me mad for not able to have those info available.
Keep up
Thx, Alexis
Thanks!
I'm making a series showing how I'm building the whole interface FYI - you can see all the interface progress as I'm designing the system:
@UKSFM99 how's it going, it's been a while since you posted these... ?

Question Doubts about what can be done with a 7862

Hello. I am looking for a radio to install in my skoda Rapid and I have doubts regarding these FYT uis7862.
1- Would the parking sensors work acoustically and visually?
2- Could I see the information of open doors, temperature, etc on the screen?
3- Can it be integrated with the car's on-board computer to see the phone or navigation?
4- What can be done with these radios that cannot be done with a Px6 or vice versa?
Do you mean FYT based UIS7862
marchnz said:
Do you mean FYT based UIS7862
Click to expand...
Click to collapse
Yes
1- Visually (someone correct me if I'm wrong)
2- Depends on your car and canbus
3- Depends on your car and canbus
4- Esasy rootable and many mods available !
@albertron The canbus is one of the biggest unknowns. Unless there is someone with the same car model and audio, amplifier and climate control as you, there is no way to know unless you try it yourself. You can ask the reseller, but if they say everything works and then it doesn't, what will you do?
Each manufacturer/reseller of these Android head units has code that works with the canbus modules. They don't share code. Some manufacturers are better than others with the canbus coding. Your experiences with other head units, such as a PX6, are not relevant as the code on the PX6 may or may not be used in these newer models.
As cars electronics change and become more complex or various items are integrated such as climate control through the head unit screen, canbus coding for the manufacturers of these head units becomes more difficult. My car is a 2012 Kia Sorento with an amplifier. The audio from the head unit to the amplifier is the only thing that uses the canbus that is used by my head unit. The canbus module that the reseller provided did not work and I had to purchase an aftermarket interface module. I was lucky that I found it. If I didn't find the interface module, I would have a paperweight that I would try to sell.
So, if those items you mention are important or required for you, I would make sure those functions work for your specific setup before purchasing a head unit...any head unit.
The above is what I've come to believe and based on my experience with my head unit and what I've read on various forums.
@mariodantas @mastrv
Thanks for answering. So it's best to ask the seller. Really the only thing that matters to me is that the parking sensor and the buttons on the steering wheel work, the rest of the things are secondary. I have also seen that most radios do not include the canbus adapter and you have to buy it separately, spending another €30. I'll have to look first for an adapter compatible with my skoda Rapid. Although I still have doubts about whether to take a px6 or a FYT with uis7862. I also have the option of an rcd330, but it has bugs that are too serious for me.
What would you do? My use will be 90% listening to music with tidal, and fm radio. The remaining 10% I will use a GPS navigator to travel.
albertron said:
@mariodantas @mastrv
Really the only thing that matters to me is that the parking sensor and the buttons on the steering wheel work, the rest of the things are secondary. I have also seen that most radios do not include the canbus adapter and you have to buy it separately, spending another €30. I'll have to look first for an adapter compatible with my skoda Rapid. Although I still have doubts about whether to take a px6 or a FYT with uis7862. I also have the option of an rcd330, but it has bugs that are too serious for me.
What would you do? My use will be 90% listening to music with tidal, and fm radio. The remaining 10% I will use a GPS navigator to travel.
Click to expand...
Click to collapse
Your parking sensors will definitely work. If you get the correct canbus decoder you will also have visual parking sensors display on your headunit.
Chances are it will work as VAG group canbus codes are pretty well known. I helepd a friend install a MEKEDE unit in a Golf 5 and, even if this particular model was not a choice in setup, canbus integration worked out of the box.
PX6 units are obsolete, go for a FYT unit.
m00n61 said:
Your parking sensors will definitely work. If you get the correct canbus decoder you will also have visual parking sensors display on your headunit.
Chances are it will work as VAG group canbus codes are pretty well known. I helepd a friend install a MEKEDE unit in a Golf 5 and, even if this particular model was not a choice in setup, canbus integration worked out of the box.
PX6 units are obsolete, go for a FYT unit.
Click to expand...
Click to collapse
OK, thanks. I think I'll buy a medeke or navifly then. First I will ask the seller if it is compatible with my car's canbus. Another question I had that I forgot to ask: 1 year ago I had an Android radio in another vehicle, and the tidal app interface was unusable when in landscape mode. By any chance someone has it installed and can tell me if they have fixed it? The problem was that you can't access the search, or playlist, or anything. Only the music player comes out with the last song you listened to. Tidal is my main music medium, and if it still doesn't work I could consider other radios with original Android auto.
I have a Joying uis7862 based unit. It does or can do all the things you asked. Canbus adapter was included with the wiring harness. Specifically I have the JY-VQ130N4GN in a 2010 VW Passat.
I see that they offer a number of units for the Skoda Octavia. I don't know how similar the dash of the Octavia is to the Rapid.

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