[Android Head-Units] ddruker:
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.