Database Users

How to get the head unit to use an external gps and not the phone for battery life?

From what I've read android auto head units will use the gps in the car if available and not the one in the phone, this is great because using the one in the phone causes a lot of strain. My car doesn't have a gps antenna in it because it's old, but I could just as easily buy a gps antenna and hook that up to it. My question is does anyone know how to tell if a head unit will use the integrated antenna in a head unit, and if it doesn't have one, if there is a way to add your own gps antenna to the head unit that android auto will use?

Woohoo
Update: I've just found that this head unit https://www.crutchfield.com/p_113DDX9903/Kenwood-Excelon-DDX9903S.html?tp=5684 in the details tab of the page says it has gps for that purpose "GPS Antenna: The Kenwood head unit comes with a GPS antenna to enhance the performance of CarPlay and Android Auto navigation maps."
If you guys have android auto and it's killing your battery, you can also split a cable, bring the data from a cable to android auto and the power to a charger with more capacity like this, https://www.amazon.com/dp/B0047AALS0/_encoding=UTF8?coliid=IWYI0PRVEE5D&colid=35S1KKGXU6BEJ. Note if you just wanna buy that one it apparently pulls a good amount of power this user on redirect reported https://www.reddit.com/r/AndroidAuto/comments/48e65c/way_to_fast_charge_with_android_auto/ Also, if you haven't gotten one yet, if you can afford it opt for one with gps like that kenwood, it won't use the gps in your phone, or at least it shouldn't, and thus it will drain your phone battery heavily less. GPS is why your phone gets so hot and uses so much battery when you're using maps or android auto navigation.
Sorry for the blast of info but I couldn't find any summaries of this anywhere so hopefully people can get this info now.

The Sony has an add on to add GPS, but it is about $300, which is almost the price of the actual head unit. That being said, the Sony pumps out 1.5a, and easily powers up my S8+ while using music and GPS

Best android unit to replace my RCD 510 in Passat B7

Hello everybody,
I'm searching for the best unit for Volkswagen Passat B7 (year 2012) to replace my RCD 510. What I am looking for:
- Android unit with 8'' - 10'' diagonal
- Dual channel Can-Bus - (the unit should display car events: door open, AC temperature settings, parking sensors information)
- VW car steering wheel control support
- DAB+
- Good bluetooth or integration with VW bluetooth module (Is this even possible?)
I've heard about Joying, Seicane and Dasaita and I'm not sure which one is better. Your advice or suggestions will be much appreciated and welcomed. Thank you.
Best Regards

I can hardly answer your question as it stated since I only tried (and use) Joying HU.
I've replaced my RNS-510 mostly because map updates in my region are not supported anymore. Had quite a hard time with Joying, but finally have no any doubts that would do it (change) again.
My HU is 8" with HW buttons, which helps alot: being able to switch to Navi/Radio/Home from any screen is a good thing. CAN bus works OK: climate indication, doors, outside temp, safety belts, fuel, mileage, park sensors, rear view cam, hand brake status, steering wheel controls do work. I did not buy DAB+ and had a hard time with AM/FM radio reception, but changing antenna harness (both were in Joying's direct supply) solved the problem.
BT app is much inferior to the VW factory unit, especially if you do outcoming calls when driving. Incoming calls are also first identified with bare numbers, not names - it corrects on the 2nd call.
I use Huawei E8xxx 4G modem as WiFi hotspot, Joying rear cam and Joying dashcam. All in all - it's a new world which opens to you with Android HU. I could not have something like this (and much more) on factory RNS: https://yadi.sk/i/Zg1TFzHu3PDvou
You plan to abandon RCD unit, which is not a Navi system. For those like me who had RNS Navi - you are going to miss correct tunnel/no GPS guidance and correct direction in the morning when factory Navi knows right from ignition how to make proper guidance. In 3-rd party HU there is no compass, gyros and speed sensor data which are used by a navi program (speed is available via CAN, but a navi program is not aware of it, only GPS). I still agree when VW calls it's 9 year old factory HU a "premium navi".
Sound quality can not compare to factory unit despite that brand new "digital amp" (I have "D" model), but here I am lucky - all my audio interests are in FM news radio.

I also have a Passat 2012 and a Joying Sofia 8" with HW knobs (JY VL130N2).
I am generally very pleased with this combination. Everything works except for
BT indeed is not perfect.
Dasaita units also have a good reputation here. I never had one, so I cannot tell much about those...

Hello,
Thanks for response. I'm wondering if there's a specific model from Joying that's current "the best". At the moment I'm looking at:
VW 6.0 OCTA CORE HEAD UNIT PX5 and VW NEW DIGITAL AMPLIFIER AUTORADIO ANDROID 6.0 HEAD UNIT
If anyone have any other suggestions (Dasaita, Seicane...) please dont hesitate to say. Thanks.
Regards

Do not mess with "octa PX5". The second link is OK, since the part number is DE-JY-VM130N2D - just the same I have. If you have external amp, then "D" model is not recomended, take one without "digital amp" built in - like DE-JY-VM130N2.
With that choice we have a very promising perspective, just take a look here https://forum.carjoying.com/thread-1377-current-state-of-hackishness-.html

ste2002 said:
Do not mess with "octa PX5". The second link is OK, since the part number is DE-JY-VM130N2D - just the same I have. If you have external amp, then "D" model is not recomended, take one without "digital amp" built in - like DE-JY-VM130N2.
With that choice we have a very promising perspective, just take a look here https://forum.carjoying.com/thread-1377-current-state-of-hackishness-.html
Click to expand...
Click to collapse
Why are you saying do not mess with PX5? A lot of users recomends PX5 because it is new and has unofficial support like PX3, so seems more futureproof than anything else right now.

New Joying PX5-based Android 8.0 Units - [Rockchip PX5 A53 | Android 8.0 | 4GB RAM]

I installed two different models of Joyings newest PX5-based head units. Both are the 7 inch screen 4GB RAM / 32GB flash double DIN model with flat buttons on the left edge.
Please note that as of May 2018, there appear to be multiple new 4GB / 32GB Joying head units have different internal hardware and are not compatible with each other or with the PX5 2GB Joying head units.
JY-UM128N4PX5 is a QD unit
JY-UO128P4 appears to be an FYT unit
Buyer beware. My recommendation is AVOID the QD based units and seek out the FYT units.
See below for more details.
The following information is for JY-UM128N4PX5. Further down the page is information for JY-UO128P4.
=============== JY-UM128N4PX5 =================
Came with Android 8.0.0 installed.
APP Version TP6735 0.0.65
MCU Version TP6735 4.40
Kernel Version 4.4.103
Master password:126
Password for changing logo:0000
Password for changing UI:8086
So far I have noticed the following:
The unit does not trigger the amplifier turn on signal wire - the orange and black wire labeled AMP-CONT always measures zero volts on my voltmeter. Workaround is to use either the antenna signal wire, or the ACC power signal wire, to turn on your amp. Joying is aware of this issue.
Sleep does not work. The unit shuts down completely about one minute after you turn off the vehicle's ignition. It doesn't sleep and then come back on instantly like my Intel-based Joying unit. Boot time is about 20 seconds. Joying support now says that sleep is not supported on the QD units.
I cannot find the radio settings in the new radio app. You used to be able to slide the bar at the bottom of the radio app to get to settings. Now in Android 8, there are a couple of radio settings that have been moved to the main android setup dialog.
Some of the functionality of the former car settings app has been moved to the android settings dialog. But not everything is there - for example this is where I was looking for the ability to tell the unit to toggle the amplifier signal wire. I could not find any such setting.
AM radio reception is non-existent - static on all AM channels.
FM reception is good, but I cannot figure out how to get the FM Radio to enable display of song and station information - this used to be under RDS settings, which no longer exist.
Bluetooth calling works fine. Seems more stable than my older Intel-based unit.
Sound quality is good - I am using an external amplifier.
The logo set up is missing Porsche and Saab Logos. My Intel-based Joying unit had these. Easy enough to load my own custom logo.
The unit ships with Joying's "Launcher3" selected. On the home screen, the labels of the bottom row of icons are cut off. The screenshots on Joying's website show the same thing. The joying2 launcher is missing.
If you reflash the unit, the vertical keypad on the left side of the unit gets un-mapped and stops working. Fix is to go into car settings and remap it.
========================= JY-UO128P4 ==================
Android Version 8.0.0
Build Number px5-userdebug 8.0.0 OPR5.170623.007
System Info APP 1024x600 2018-04-27 21:42:36
MCU Version 2018-01-23 10:59:33 JY_(R68)_R-86C-096I-NC-NP-1.0-P12S
Passwords:
Factory settings: 3368
Developer Options: 3368
Reset: 3368
Password for changing Launcher:8086
Password for changing screen current:
So far I have noticed the following:
The software on the JY-UO128P4 is very close to that of my older Joying Intel based system.
The developer has replaced all of the system settings screens native to android with their own settings screens. Not super cool. All of the car settings and android system setting are now intermingled.
Upon unboxing, the JY-UO128P4 has only a single Wifi antenna wheras the JY-UM128N4PX5 had two (diversity) wifi antennas. I have not tried to compare reception differences.
The amplifier turn on signal now works as expected (AMP-CONT wire correctly signals 12V when unit is active)
Sleep works as expected
AM radio reception works weakly.
The FM radio application works as expected. Radio app settings are accessed within the radio app. It's possible to enable RDS for song and station ID within the radio app.
All of the joying launchers are available - I prefer launcher 02 and it's available on this unit.
Many more car logos are available on the system. Porsche logo was built-in.
The only things I've noticed so far that are worse with the JY-UO128P4 than the JY-UM128N4PX5
The unit suffers from the android 8.0 bug on Joying where all of your google contacts are deleted if you allow your account on the head unit to sync contacts with google.
As noted above - the native android settings panels are all removed.
The app for setting the color of the buttons on the side panel is limited to pre-determined solid colors - yellow, white, red green etc. On the JY-UM128N4PX5 you could select and set any RGB color, which made it possible to match the button illumination to your other dashboard lights.
As I learn more, I will post more.

ddruker said:
I just installed Joying's newest PX5 head unit. It's the 4GB model.
It came with Android 8.0.0 installed.
APP Version TP6735 0.0.65
MCU Version TP6735 4.40
Kernel Version 4.4.103
So far I have noticed the following problems:
The unit does not trigger the amplifier turn on signal wire - the orange and black wire labeled AMP-CONT always measures zero volts on my voltmeter. Workaround is to use either the antenna signal wire, or the ACC power signal wire, to turn on your amp. I found another post of someone else who had this same issue.
I cannot find most of the passwords needed to set up the unit. The master password is 126 - I found that by watching a joying video. But I cannot find the second level passwords for changing the logo, changing the launcher, etc. Anyone have the other passwords?
The utility to change the color of the buttons on the left side of the unit works, but the buttons do not illuminate one the unit is booted.
I cannot find the radio settings in the new radio app. You used to be able to slide the bar at the bottom of the radio app to get to settings. Now in Android 8, there are a couple of radio settings that have been moved to the main android setup dialog - but for example I cannot find a setting to turn on the functionality to identify song and station names.
Some of the functionality of the former car settings app has been moved to the android settings dialog. But not everything is there - for example this is where I was looking for the ability to tell the unit to toggle the amplifier signal wire. I could not find any such setting.
I cannot figure out how to change the launcher - with the default launcher the lower row of app icons is only half visible on the screen.
Who else has a new Joying Android 8 unit - what else are you seeing? Has anyone found solutions to the items above?
Click to expand...
Click to collapse
I have had several back and forth emails with Joying support in the last couple of days.
They are trying to find the passwords for their new units under Android 8. Support didn't know. They had me try 00000 and 123456, neither of which worked. I told them the main password is 126 - they didn't know this either. I still need passwords for all of the second level settings - change the launcher, change the logo, see if there are more developer options for car config, etc.
They are apparently aware that the AMP-CONT lead to turn on the external amplifier does not work. They recommend connecting the accessory wire from your vehicle to the amp signaling wire instead, so the amp will turn on when you turn your key to the accessory or on position, bypassing the head unit.
They acknowledge there are no detailed settings available for the radio under Android 8 in the radio app. So there is no way to turn on station or channel ID for US customers.
I also let them know about another radio issue - FM Radio reception is normal, but AM reception is awful to non-existent.
Google maps is ok, directions from Google maps are mixing with other audio ok.
Feels like Android 8 on the new Joying 4GB units isn't quite ready for prime time yet... Has anyone tried to upgrade a 2GB Android 6 unit to Android 8 now that the Android 8 files are on Joying's website? Do you see the same behaviors, or am I seeing hardware issue with the brand new 4GB units? I suspect it's all software, but would be nice to know.

ddruker said:
Feels like Android 8 on the new Joying 4GB units isn't quite ready for prime time yet... Has anyone tried to upgrade a 2GB Android 6 unit to Android 8 now that the Android 8 files are on Joying's website? Do you see the same behaviors, or am I seeing hardware issue with the brand new 4GB units? I suspect it's all software, but would be nice to know.
Click to expand...
Click to collapse
The 2GB units are not compatible with the 4GB units. They need different hardware drivers and different MCU firmware as the firmware in the 2GB units is from FYT. I forgot the manufacturer of the 4 GB units but @gtxaspec knows.
There is no downloadable firmware yet for the 2GB units.

hi, i've the same unit and the password was noted into the user manual, it's 3368.

If you buy Joying android 8.0 unit the SKU like:JY-UO135N4PX5 or JY-UOS03N4PX5,password as below:
Master password:126
Password for changing logo:0000
Password for changing UI:8086

TomTom
It seams to be so hard. Again an Android HU, where TomTom navigation does not work. It let's me download the maps, but after that it crashes every time I try to load the application.

I can confirm these passwords are correct:
Master password:126
Password for changing logo:0000
Password for changing UI:8086
Other findings so far:
The illuminated buttons do work - they sometimes take a few seconds to come on after your illumination wire signals with 12V.
The logo selection with this new unit does not include Porsche or Saab. You can still upload your own custom logos.
I updated the unit to the latest (2018-4-20) release on the Joying website which is supposed to include optimizations and Zlink and my unit is now hanging at the Android text logo (right after the animated Android logo). I sent a note to Joying support for help and will also wait for a few hours to see if it comes back to life.

ddruker said:
I can confirm these passwords are correct:
I updated the unit to the latest (2018-4-20) release on the Joying website which is supposed to include optimizations and Zlink and my unit is now hanging at the Android text logo (right after the animated Android logo). I sent a note to Joying support for help and will also wait for a few hours to see if it comes back to life.
Click to expand...
Click to collapse
The same happened to me
After writing about 25 emails with Joying support I had to reflash the whole system ... loosing all my data.
For now I am really not going to try any more updates from Joying with this unit.
Really hoping for a Custom Rom & Root for this unit.

I have one of these as well. Any one find where the setting is to make the sleep mode last longer(2hrs) before it full shuts down? it seems to be locked on 30sec currently. Also it wont pair with my OBDlinkMX BT dongle. in the older MTCD units, making the BT password 1234 let you do it, but not here. anyone have any luck with BT OBD dongle pairing?

I was really leaning towards getting this unit but have been holding off because I wish it had Bluetooth 5.0, maybe I should wait a little longer since it seems to have a fair amount of bugs. I know a lot of people are happy with the Xtron since it has all the best features I just really prefer to have the buttons on the left like this unit has. Looking forward to seeing if you guys can get this squared away

peregrines said:
The same happened to me
After writing about 25 emails with Joying support I had to reflash the whole system ... loosing all my data.
For now I am really not going to try any more updates from Joying with this unit.
Really hoping for a Custom Rom & Root for this unit.
Click to expand...
Click to collapse
I was able to get my unit working again by reflashing. It took about 10 tries with three different USB cards but it finally worked. Joying support provided a file that included a system image and a Window-based chinese language USB card writing programs, along with a word document with instructions. You build the USB drive and then plug it into the left hand USB connector, and click the reset button on the front of the unit. It loads, then tells you to remove the USB drive, and then if you are very lucky it will reboot into Android.
After re-flashing, the vertical keyboard on the left side of the unit did not work. Turned out the mappings had been erased. Fix is to remap the keys - there is an option in car settings.
Current issues still present in the unit seem to be:
Unit shuts off entirely after 30-60 seconds instead of sleeping when you turn off the vehicle. My intel-based unit sleeps for several days.
No AM radio reception - static on all channels.
No way to turn on song or station identification in the radio settings for FM.
AMP-cont signal wire does not work. I've worked around by wiring my accessory wire directly to my amp's signaling wire.
Have not tried Torque and Bluetooth ODBII reader pairing yet - on my list for this weekend.

So, it's not just me...
I purchased a JY-UM135N2PX5 (PX5 2G/16G) with Android 6.0 mid to late March.
I had it on my bench through April, testing and configuring it prior to install.
After trading emails with Joying tech support, I was sent an Android 8.0 update to address a Zlink/iPhone issue.
I started my install in the car today, and discovered "no sound". I guessed that the AMP-CONT wasn't turning on the OEM amplifier. I rechecked the cables, which checked out just fine. Tried a Joying JY-UM135N2 (Intel Sofia 2G/32G Android 6) on the same harness, and it functioned as expected (turned the OEM amplifier on and had sound). I took them both back to my bench and noticed that the "AMP-CONT" on the PX5 unit did not appear to have 12V on it, while the Sofia unit did.
I did not leave the non-functional PX5 unit in the car long enough to see any other issues.
I am curious if I were to revert back to Android 6 on the PX5 unit, if it would fix the AMP-CONT issue (at the cost of breaking the Zlink/iPhone functionality)

ddruker said:
I was able to get my unit working again by reflashing. It took about 10 tries with three different USB cards but it finally worked. Joying support provided a file that included a system image and a Window-based chinese language USB card writing programs, along with a word document with instructions. You build the USB drive and then plug it into the left hand USB connector, and click the reset button on the front of the unit. It loads, then tells you to remove the USB drive, and then if you are very lucky it will reboot into Android.
After re-flashing, the vertical keyboard on the left side of the unit did not work. Turned out the mappings had been erased. Fix is to remap the keys - there is an option in car settings.
Current issues still present in the unit seem to be:
Unit shuts off entirely after 30-60 seconds instead of sleeping when you turn off the vehicle. My intel-based unit sleeps for several days.
Poor AM radio reception
No way to turn on song or station identification in the radio settings.
AMP-cont signal wire does not work. I've worked around by wiring my accessory wire directly to my amp's signaling wire.
Have not tried Torque and Bluetooth ODBII reader pairing yet - on my list for this weekend.
Click to expand...
Click to collapse
Would you be so kind as to share those files with us? This would be a good starting point for further testing and research. Simply upload to a hoster like mega.

z0rn said:
Would you be so kind as to share those files with us? This would be a good starting point for further testing and research. Simply upload to a hoster like mega.
Click to expand...
Click to collapse
Here is a link to the zip file from Joying with the firmware image for reflashing, their USB drive utility, and instructions...
https://drive.google.com/open?id=13HXHRRfuduhIYV41pjQlvsJ0o3xesNBC

Here is the reply I got from Joying support this morning in regards to the open defects I am tracking with the unit. I suspect that all of this will get fixed in subsequent software releases, it's relatively obvious stuff. Can anyone confirm if these same issues exist in the Android 8 builds on Joying's 2GB PX5 head units, or are these unique to the newest 4GB units?
Dear friend,
Please noted :
1) sorry that your system is different with Intel head unit , it do not have fast boot feature . so it will completely off .
2) for the AM receptions is bad , you need to set the proper time and zone . also the radio area choice .
3) sorry, the head unit you purchased do not have the RDS setting .
4) for the am-cont not voltage , please connect the ACC (red wire ) to your amplifier wire . then can offer 12V .
Hope your noted .
Candy

ddruker said:
Here is the reply I got from Joying support this morning in regards to the open defects I am tracking with the unit. I suspect that all of this will get fixed in subsequent software releases, it's relatively obvious stuff. Can anyone confirm if these same issues exist in the Android 8 builds on Joying's 2GB PX5 head units, or are these unique to the newest 4GB units?
Dear friend,
Please noted :
1) sorry that your system is different with Intel head unit , it do not have fast boot feature . so it will completely off .
2) for the AM receptions is bad , you need to set the proper time and zone . also the radio area choice .
3) sorry, the head unit you purchased do not have the RDS setting .
4) for the am-cont not voltage , please connect the ACC (red wire ) to your amplifier wire . then can offer 12V .
Hope your noted .
Candy
Click to expand...
Click to collapse
Are they serious? I would suggest to try the Malaysk Rom, i guess your units are MTCD and MTCE devices so maybe this rom would support the missing software like rds and the other hardware not supported by Joying
https://www.youtube.com/watch?v=WWvgrcn_As8
https://forum.xda-developers.com/an...-malaysk-roms-px5-2-4-gb-8-0-android-t3762724
Good luck!

Flemischguy said:
Are they serious? I would suggest to try the Malaysk Rom, i guess your units are MTCD and MTCE devices so maybe this rom would support the missing software like rds and the other hardware not supported by Joying
Click to expand...
Click to collapse
These units are NOT MTCD/E. Do not use the Malaysk ROM.
---------- Post added at 07:08 PM ---------- Previous post was at 06:53 PM ----------
ddruker said:
Here is the reply I got from Joying support this morning in regards to the open defects I am tracking with the unit. I suspect that all of this will get fixed in subsequent software releases, it's relatively obvious stuff. Can anyone confirm if these same issues exist in the Android 8 builds on Joying's 2GB PX5 head units, or are these unique to the newest 4GB units?
Dear friend,
Please noted :
1) sorry that your system is different with Intel head unit , it do not have fast boot feature . so it will completely off .
2) for the AM receptions is bad , you need to set the proper time and zone . also the radio area choice .
3) sorry, the head unit you purchased do not have the RDS setting .
4) for the am-cont not voltage , please connect the ACC (red wire ) to your amplifier wire . then can offer 12V .
Hope your noted .
Candy
Click to expand...
Click to collapse
I have a 2GB Android version 8.0.0 unit, but my unit is a FYT based unit like the Sofia 3GRs, unlike yours which is a QD unit.
Mine does have fast-boot as my unit is a FYT based unit, using the same hardware/SOM as the Sogia 3GR intel units.
I never used AM-reception. I wouldn't know, but I know from previous users on Sofia 3GR that they also complained about the AM reception
Which RDS-setting? This is so confusing and so not concrete. RDS is a complete set of functions. The syu/FYT based software on the FYT based units support RDS-PS, RDS-PTY and RDS-TA/TP. The latest firmware versions on FYT units (Sofia 3GR and my PX5) also support RDS-RT. They do not support RDS-AF. They implemented "something" like AF. If you use that option it does not select the Alternate Frequency of your radio station, it selects the strongest signal it can find of any station. Note that it is the software. The radio chips in all these units support the complete RDS set of functions.
Don't know about the the amp-cont wire.
You ask about and mention AM and about RDS. I hope you know that RDS can only be used on the FM signal. RDS is not available for AM.

Help
Heres a link I need help to identify my android head unit
https://app.box.com/s/o90d0lnjrqqlek5w1q6lekaj5dgsa20y

Traww said:
Heres a link I need help to identify my android head unit
https://app.box.com/s/o90d0lnjrqqlek5w1q6lekaj5dgsa20y
Click to expand...
Click to collapse
You have an Allwinner T3 chipset in your unit.
Do not use a Joying thread to ask a completely off-topic question.

I've received the same unit, facing the same issues as the OP.
Also the localisation in my language is quite poor.
surfer63 said:
These units are NOT MTCD/E. Do not use the Malaysk ROM.
Click to expand...
Click to collapse
I've bought this unit in the hope that it would be compatible with custom ROMs.
Are you saying that the unit MCU is almost unknown and that no custom ROM would be available in the near future?

HIZPO 4/64GB Andriod 10 GPS lag

Hello
I bought this new HIZPO car unit.
.amazon.de/dp/B07X3N7WPZ/ref=cfb_at_prodpg
It is an Rk3368, Andriod 10, but I can`t find nothing about the MCU in the unit.
It works fine but I have problem with the GPS.
Even though enough satellites are always received, the navigation system lags behind.
Especially at intersections and curves, the navigation system just drives straight and calculates new routes before it notices that I have turned. I tried 3 different navigation programs, all have the same phenomenon.
Does somebody have any idea?

Adamski999 said:
Hello
I bought this new HIZPO car unit.
.amazon.de/dp/B07X3N7WPZ/ref=cfb_at_prodpg
It is an Rk3368, Andriod 10, but I can`t find nothing about the MCU in the unit.
It works fine but I have problem with the GPS.
Even though enough satellites are always received, the navigation system lags behind.
Especially at intersections and curves, the navigation system just drives straight and calculates new routes before it notices that I have turned. I tried 3 different navigation programs, all have the same phenomenon.
Does somebody have any idea?
Click to expand...
Click to collapse
Which navigation software is used?
If it´s an online navigation software I would try any offline version as HERE.

The unit is only offline and I use offline Navigation Software, two Version of Igo, Navigon, Google maps offline and Locus.

Klyde PX6 Unit GPS issue. (MT3337 chipset)

Hi All,
I have just installed a Klyde PX6 unit in my CX5 (with Bose). All is fine except for a GPS issue (built in). The GPS is showing a huge lag in position and speed updates as can be seen in the videos. One video shows same app running on Klyde unit and my mobile.
I need to send commands directly to the MT3337 GPS chip or replace it with a non averaging unit (real time/ live updates). It would be good if I can access the NMEA data stream to confirm it's the GPS chipset/module or the the android service being delayed/not serviced regular enough.
Klyde unfortunately have been a little more than useless with their engineer saying its normal GPS behaviour. Maybe for China but not for the rest of the world. I sold GPS modules for 10 years and never saw this behaviour.
Any clues on how to address this?

You should use the GPS mouse which has been delivered with the unit, instead of using the OEM on the roof.
You would have the same behavior with most OEM installed GPS antennas, independent of the car.

I am using the supplied GPS antenna.. there is no way to interface the tomtom Mazda factory one.

malster181 said:
I am using the supplied GPS antenna.. there is no way to interface the tomtom Mazda factory one.
Click to expand...
Click to collapse
1 minute ago
Add bookmark
#3
I am using the supplied GPS antenna.. there is no way to interface the tomtom Mazda factory one.

This PX6 is using a MT3337 chipset. I'll try interfacing to the NMEA (TX DATA) stream from the MT3337 and see if it is delayed at that point. If so, then it's a config issue in the MT3337. If it's not delayed there, then it's a Klyde issue.
Also discovered the ODB2 Bluetooth interface is not working.
Illumination wasn't working originally, I had to put a 4.7K resistor to ground as it wasn't pulling low enough for it to register lights were off...
Not been a great experience with this Klyde thing. Was looking forward to importing them for resale, but not now if this is the sample unit performance.

malster181 said:
This PX6 is using a MT3337 chipset. I'll try interfacing to the NMEA (TX DATA) stream from the MT3337 and see if it is delayed at that point. If so, then it's a config issue in the MT3337. If it's not delayed there, then it's a Klyde issue.
Also discovered the ODB2 Bluetooth interface is not working.
Illumination wasn't working originally, I had to put a 4.7K resistor to ground as it wasn't pulling low enough for it to register lights were off...
Not been a great experience with this Klyde thing. Was looking forward to importing them for resale, but not now if this is the sample unit performance.
Click to expand...
Click to collapse
tbh... I still have 3 different Klyde units working in car and bench and had some more in the past.
None of your reported issues have ever been observed on any of my units.
OBD2 BT issues are only if you bonded any phone before you added the BT stick. BTW... not all sticks are working. That is a common thing in Chinese radios.
btw... If you have any issues, you just should ask Klyde. They are really responsive, at least if you ask Fany.

Hi Rigatoni,
As I said, I have asked and they are not so helpful. Insisting the GPS functionality is normal. If I drive atv60k/hr and stop, GPS takes up to 15 secs to show a stop or slow down. I have sold GPS in a past life both commercial and military and never seen such a lag before. Even old SiRF and Siny chipsets are so much faster.
Klyde did give the pinout if the GPS module, so I'll start but analysis of the MT3337 data stream. I have a few other GPS modules here I can try pop in it.
Anyone know if there is a config file in Android or the Klyde somewhere that sends the commands to the GPS module to set it up, eg set buad rate, sample rate etc? Or is the MT3337 just running default settings?
As for the ODB2 I wasn't aware of that issue, and again Klyde hadn't advised of it. The ELM unit was also supplied by Klyde. So how do I undo the hijacking of the serial port by a phone and release it for ODB2…? Factory reset?

malster181 said:
Hi Rigatoni,
As I said, I have asked and they are not so helpful. Insisting the GPS functionality is normal. If I drive atv60k/hr and stop, GPS takes up to 15 secs to show a stop or slow down. I have sold GPS in a past life both commercial and military and never seen such a lag before. Even old SiRF and Siny chipsets are so much faster.
Klyde did give the pinout if the GPS module, so I'll start but analysis of the MT3337 data stream. I have a few other GPS modules here I can try pop in it.
Anyone know if there is a config file in Android or the Klyde somewhere that sends the commands to the GPS module to set it up, eg set buad rate, sample rate etc? Or is the MT3337 just running default settings?
As for the ODB2 I wasn't aware of that issue, and again Klyde hadn't advised of it. The ELM unit was also supplied by Klyde. So how do I undo the hijacking of the serial port by a phone and release it for ODB2…? Factory reset?
Click to expand...
Click to collapse
Strange with your GPS... never seen that. I use TomTom in my units and it doesn´t lag more than 1 second in bad cases.
To change the GPS module you need to get into the rooted system. Out of memory I don´t know the exact path. I also have only a PX6 on hand, but this has a complete different MCU and I don´t know if this is the same. Will have a look tomorrow after the files for it to change.
To get the phone off of the unit, you need to first of all close BT connection on your phone.
Then remove start the radio and remove the connection from the radio... completely.
Shut down the radio
Turn BT on your phone on and remove the connection in your phone.
Close BT on your phone again or shut it down.
Put in the OBD2 dongle in your car
Turn the radio on and set the PIN to 0000 or 1234 (depends on the dongle) There are no other possible PINs available, just one of these 2 written in here.
Search for the OBD2 and connect to it.
Start BT on your phone and search from the phone!!!
Enter the PIN as written and that´s it.

rigattoni said:
Will have a look tomorrow after the files for it to change.
Click to expand...
Click to collapse
Hi rigattoni,
By chance did you get around to looking at this?

Ok so I have installed a different chipset (oh and seems Klyde didn't even know what GPS chipset is in their unit, as it's not MT3337 as they advised), and the result is the same.
So it's a Android issue, maybe the location service NMEA data queue is not being cleared it refreshed fast enough. I don't know enough about Android to know how it works, but I gather the NMEA data from GNSS module is read and saved or queued somewhere, then this is read by the location.service routine when required.
I could also be that the GPVTG sentence is being dropped by Android, are the NMEA sentences accepted by Android location service filtered?
Can anyone help here where to look it's even possible with unrooted unit ?
Cheers,
Mal

rigattoni said:
You should use the GPS mouse which has been delivered with the unit, instead of using the OEM on the roof.
You would have the same behavior with most OEM installed GPS antennas, independent of the car.
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Click to collapse
Indeed I'm experiencing this problem (lag) while using an adapter and the OEM roof GPS antenna... Why is that?? It's a pity because OEM antenna is perfectly placed and concealed...

XxFraNxX said:
Indeed I'm experiencing this problem (lag) while using an adapter and the OEM roof GPS antenna... Why is that?? It's a pity because OEM antenna is perfectly placed and concealed...
Click to expand...
Click to collapse
I just know out of tests that I had the best results with the GPS mouse.
All external antennas I tested have been worse.

Hello,
I have exactly the same problem.
It's also from Klyde with a PX6.
Is there a solution?

Figo Emilio said:
Hello,
I have exactly the same problem.
It's also from Klyde with a PX6.
Is there a solution?
Click to expand...
Click to collapse
Solution for what?
GPS?
You should give some more information...
Exact unit number you buyed
MCU
Android version

Sorry.
A solution for the delayed GPS signal.
I Hope the Pics are ok?!