[ROM] [ROOT] [TWRP] [GUIDE] YT9216B Chinese Android Head Unit

[gouster3]

So... how to root your device?
how to flash twrp?

You can use this pre-rooted firmware, with included twrp.
-Build type is userdebug, means u can enable multi-window mode in dev settings
-Based on latest available firmware
-Root
-Busybox
-TWRP
-HIFI enabled
-UI1 Launcher
-FM Radio with RDS and save manager.
-TPMS (working with cheap chineese usb units)
-DVB-T & SDR (required RTL2832U)
Its backup of system i already have modified for myself.
It means, its branded to Ford Mustang all the way.
U can do this to get rid of that branding:
-choose another bootlogo.
-flash new bootanimation.
-install stock (not modified) UI1 launcher

To get ADB, i recommend this app:
WiFi ADB - Debug Over Air

Download:
YT9216B_00002_V004_20191012_HIFI_V3.zip

Factory settings password: 8888

Important note: Android 8.1 Go is just chineese marketing trick, in reality this head unit has android 6.0 (api lvl 23, not 27 as 8.1 should have).

 

[gouster3]

folowed V4A Rom Inclusion
So, ViPER4Android included in ROM.
credits to ViPER520
ViPER’s Audio Website
ViPER’s Audio XDA Thread
Users, use “Compatible Mode” if you plan to install other sound mods. No other sound mods included in ROM.

 

[gouster3]

Screenshots

 

[gouster3]

Instructions

Prepare:
- download and unzip archive from my first post
- make/buy USB A male to A male cable (for photos see attachments)
- install drivers from SP_Driver folder

Backup:
Just in case make backup (readback in ATC Flash Tool)
I didnt done it, so if u want, search for guide online

Flashing process:
- open flash_tool.exe from ATC_Flash_Tool folder
- select Download-Agent MTK_AllInOne_DA.bin from ATC_Flash_Tool folder
- select Scatter-loading File AC8227L_Android_scatter.txt from Firmware folder
- make sure PRELOADER is not checked. (There isnt any in in my fw. Just in case if u use this guide for some another fw)
- press Download button
- connect your USB A to A cable one side to PC, another one to your head unit. I recommend u to use that 4 pin usb port (that one with smaller plastic end), but shouldnt matter.
- press RST button on your head unit (use some pin, paper clip or toothpick)
-wait until flashing process ends. There should appear green message.
- press RST button again and let yout headunit boot.
- perform factory reset on your head unit to prevent any bugs

Flashing process error:
- happends sometimes
- disconnect your cable
- if possible, disconnect your head unit from electricity for a while
- press download again, connect usb cable back, and press RST button.
- check if your cable is not faulty.
- for homemade cable try to apply some solder on cable ends, check if ends arent shorted, use tape on them, or buy original cable

 

[gouster3]

Reserved

 

[tuga_bcl]

my radio version is yt9216b_00002_v004_20190801 can i install your

Mine is not hifi

 

[gouster3]

my radio version is yt9216b_00002_v004_20190801 can i install your

Mine is not hifi

Sure. Mine is same.
HIFI is just EQUALIZER preset for best result. Included into firmware.
But today i want release update. Its worth to wait.

 

[tuga_bcl]

ok I'm waiting for release update

 

[MuhammadHleihel]

How can I install stock launcher?
and change the boot logo and animation?

 

[tuga_bcl]

hello already installed this version this top. I detected a bug in the active rear camera but not the image. How much boot animation should give to choose another for those who do not have Ford car. The torque app and tpms should be optional to install. this is my opinion of course you have developed the firmware to your liking to which you are top. If you don't mind you could develop a version with only root busybox twrp and Hifi. unaware of viper audio but it's top. in short I congratulate you

 

[gouster3]

hello already installed this version this top. I detected a bug in the active rear camera but not the image. How much boot animation should give to choose another for those who do not have Ford car. The torque app and tpms should be optional to install. this is my opinion of course you have developed the firmware to your liking to which you are top. If you don't mind you could develop a version with only root busybox twrp and Hifi. unaware of viper audio but it's top. in short I congratulate you

apps can be disabled.
Its more "backup of my unit" than ROM.
It takes space just in system, users which would know how to add something into /system would also remove everything they dont need to get more space.

uploading new version.

bootanimation can be changed in settings.

 

[gouster3]

updated.

 

[tuga_bcl]

what changes did you make?

 

[tuga_bcl]

This top. How can I install another launcher and radio rds?

I wanted to install ui1launcher without modification

 

[gouster3]

This top. How can I install another launcher and radio rds?

I wanted to install ui1launcher without modification

Radio should already support RDS.
Launcher can be pushed into system.

 

[strangwooduk]

Just wondering if this will be compatible
my system shows i have
android 9.1
XY auto 3.1 (8227L) same as MCU

but yours is showing android 8.1 ?

 

[tuga_bcl]

mine was also android 9.1 "fake" and now after updating with the firmware provided here is 8.1 go

 

[strangwooduk]

No wonder Android auto doesn't work
quite happy to give this a try but want a failsafe of backing everything up first
anyone know how to do that prior to upgrading

 

[dzen7]

Zdravím, nedaří se mi spojit HU s počítačem, můžu poprosit o pomoc? Děkuji

 

[jmckeejr]

Would this work if my unit is yt9217b instead of yt9216b? I tried flash TWRP myself but almost got caught in bootloop