[DEPRECATED][ROM][diOS][N] Samsung Galaxy Tab A 7.0 LTE SM-T285 (gtexslte) - Samsung Galaxy Tab A series ROMs, Kernels, Recover

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This is discoveryOS (diOS)
Code:
/*
* I'm not responsible for bricked devices, dead SD cards, thermonuclear war, or you getting fired because the alarm app failed (like it did for me...).
* Please do some research if you have any concerns about features included in the products you find here before flashing it!
* YOU are choosing to make these modifications, and if you point the finger at me for messing up your device, I will laugh at you.
* Your warranty will be void if you tamper with any part of your device / software.
* Same statement for XDA.
*/
About this project: discoveryOS (or in short: diOS)
I was not satisfied with any external car navigation system I can get because either they are ultra slow, outdated, having bad user experience, missing speed cam support or simply taking ages to get a gps lock within my car.
So the main approach here is not having the best ROM for all users but for those having the same need then I have. Usually these both should not conflict so if I fix an issue for my needs it might fix yours as well. But my focus is navigation, nothing (much) else.
Examples: if Camera has issues I might not solve it, if calling has issues I might not solve it, etc.
Features of discoveryOS
fully based on /e/ OS for a full google-free experience
F-Droid (OpenSource Apps as an alternative to Google Play) including extra repos
debloated everything not needed for diOS (for details check this list)
Integrated MagicEarth Navigation
Integrated Automate App
Integrated Aurora Store
Speaker output optimized for speech (i.e. increasing loudness as much as possible)
my builds come with full OTA update support (from v2.0 on)
(... you know that thing which informs you that a new update is there and where you just click to download + install)
Roadmap
Implementing Kiosk Mode for navigation only (might be provided as a separate build)
links: <--- abandoned by using the app "Automate" instead
the one I will go for (tested fine already): https://www.sdgsystems.com/post/pro...droid-devices-with-a-device-owner-application
older approaches:
Implementing Kiosk Mode in Android - Part 1
Part 2 Part 3 Part 4 Part 1: No Android Changes Required Note: Looking for Kiosk mode in Android Lollipop 5.0 or later? Skip to part 3. What is “Kiosk Mode” and why would you want to use it? Kiosk Mode basically allows a single Android application to have full control of the system. The user is...
www.sdgsystems.com
Implementing Kiosk Mode in Android - Part 3: Android Lollipop (and Marshmallow)
Part 1 Part 2 Part 4 Part 3: Android Lollipop (and Marshmallow) Android 5.0 (Lollipop) and 6.0 (Marshmallow) now have an official Kiosk Mode that anybody can use, but they don’t call it Kiosk Mode. They call it “screen pinning” or “task locking”. This article will provide information on how to...
www.sdgsystems.com
Implementing Kiosk Mode in Android - Part 4: A Better Provisioning Method for DPC / Device Owner
Part 1 Part 2 Part 3 In part 3 of our series on kiosk mode, we provided source code for our Set Device Owner app. This app allows you to provision Android Lollipop and Marshmallow devices using the “device bump” method, which configures device owner apps or device policy controllers (DPC) such...
www.sdgsystems.com
Integrate my created Automate flow to simulate a KIOSK mode (i.e. start navigation on boot and keep it on top always)
Requirements
Your device need to be unlocked (seriously?!)
Latest TWRP/SHRP build is highly recommended, e.g. mine: see my recovery post
Do a full Nandroid backup before doing anything else!
Samsung STOCK firmware should be on T285XXU0AQH1.
You can check your current firmware version in Android -> settings -> About / Phone info -> Baseband version
If you like try first without flashing this firmware but if you encounter any issues upgrade to this version first before reporting
Fast and (afaik) good site for downloading: https://sfirmware.com/samsung-sm-t285/
(scroll down and type T285XXU0AQH1 in the search box, choose the one for your country, download, flash as usual, flash TWRP/SHRP again, flash this ROM)
Installation
Backup
When you flash diOS the first time:
Wipe: System and do a factory reset !
A LOT of bad stuff can happen otherwise
Flash the ROM
Optional (if you want root): Flash Magisk
Flash OpenGapps ????? STOOOOOOOOP NO No no! you don't want that on a google-free phone! diOS contains everything you need to live without Google!
Boot (be patient on first boot!!! SIM detection might take a minute after the FIRST boot after clean flash as well)
Open Maps (MagicEarth) and click the download button to get your country/region maps
Open Automate to import the kioskmode flow
Open F-Droid -> Settings -> Repositories and choose those you want to enable (most of them are described here) & swipe down to update the repo list.
Open Aurora -> choose Anonymous as long as you don't want to have paid apps working
Enjoy
Known issues
no OMS support! OMS is a hack DEEP in the android sources and all these are outdated now. if you need that use jedl's build
build is ENG , i.e. "adb root" will work and no auth required for ADB
bluetooth is working but using the blobs by jedld's build until I find the time fixing the android sources (unfortunately the repo of jedld does not contain the full history so I have to compare manually...). Until then I keep it like that.
not charging on USB connection (normal power supply works fine) - still investigating. Seems to be an issue with my kernel.
This ROM is just coming with BASIC stuff so several apps you might want to see in a regular Android ROM are simply not there.
Examples (excerpt only!):
- no Camera app
- no Browser app
- no Gallery app
- no Email app
- no Calendar app
- no <fill-in-whatever-you-are-missing>
the complete list can be found here always
If you find a bug not listed, follow the instructions here and provide me with the logs: FAQ #1
Download
Get the builds from my leech server
discovery OS: https://leech.binbash.rocks:8008/discoveryos/nougat/gtexslte/
Note:
Builds are updated when I decide to do so. There is no build cycle.
Changelogs
search results from this thread: click
Credits
LineageOS
jedld, really! thanks dude, not just for giving a starting point but also for providing your sources.
... if I forgot to mention YOU, tell me
Sources
It took me a while (2 or 3 weeks iirc) to clean up all the sources from jedld in order to be able to update and keep in sync with LOS itself.. All these can be found here:
github org
build manifest
XDA:DevDB Information
discoveryOS, ROM for the Samsung Galaxy Tab A series
Contributors
steadfasterX, jedld (without his work I would never had bought that tab! he made all the main parts until 2018!)
Source Code: https://github.com/smt285
ROM OS Version: 7.x Nougat
ROM Kernel: Linux 3.10.x
Based On: /e/ OS
Version Information
Status: Beta
Beta Release Date: 2020-11-19
Created 2020-04-03
Last Updated 2020-11-20

---

everything around my recovery images
RECOVERY images
Download (shrp + twrp)
TWRP: here
SHRP (recommended): here
I provide 3 formats:
IMG (twrp only)
TAR (shrp & twrp)
ZIP (shrp only)
When to use the IMG (twrp only)?
If you flashed a custom recovery already
if you like to flash by download mode with heimdall
When to use the TAR (shrp & twrp)?
If you never flashed a custom recovery before you have to use this one
if you like to flash by download mode with ODIN or JOdin
When to use the ZIP (shrp only)?
If you want to switch from TWRP
if you want to upgrade from one SHRP version to another
if you flashed the TAR of SHRP in download mode by ODIN or JOdin you HAVE to flash this ZIP in SHRP once
How to flash the IMG?
boot to your custom recovery
push the IMG to your device (e.g. by adb)
select flash
ensure you select "IMG" (when in TWRP. when in SHRP that is not needed)
select the IMG file
choose "Recovery" as the "Target Partition" and flash
Reboot to Recovery to complete the setup.
How to flash the TAR?
boot to download mode
start ODIN/JOdin
put the TAR into the AP/PDA slot
ensure the "Auto Reboot" is NOT ticked/checked
flash
turn the device off (HOME+PWR+VOLDOWN) and directly switch just the VOLDOWN button to VOLUP when it wakes up and hold all 3 buttons until you see the recovery loading
How to flash the ZIP?
boot to your custom recovery
push the ZIP to your device (e.g. by adb) (or start and use adb sideload and you are done)
select flash
select the ZIP & Flash
Reboot to Recovery to complete the setup

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Reserved

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New build arrived
Changelog
Release date: 2020-04-03
Download: see OP
initial build:
I had a REALLY hard time to actually make LOS 14.1 boot with cleaned sources.. thought the ramp-up will take a week at most .. but that was way off..
jedld had done several patches within AOSP and I had to find out which are required where etc. the main reason why my build were not booting at all (which is f**** hard to debug without and log and/or adb ) was that one.
But I needed to clean the sources as several parts of these were incredible outdated and so needs to be udpated.
I had spent several more days to cleaning up even more stuff and finally uploaded a test build.
feel free to join but read the KNOWN ISSUES topic carefully before.
It is still in a very early state and I have tested pretty much nothing else then boot, apps, bluetooth, WiFi
Kernel:
switching to EUR kernel
implemented kernel build within LOS build!
added own TWRP defconfig
moving kernel modules like WiFi to /system
.... and more (see "Detailed changes")
LOS:
added alle needed TWRP configs
moving kernel modules like WiFi to /system
sepolicy updates for rild
.... and more (see "Detailed changes")
Detailed changes:
LOS: this build VS. last build (by jedld, yea 19 pages ... was a long time )
Device tree: github
Kernel: github
.-

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For those interested I will also provide SHRP (skyhawk recovery) after some testing and fine tuning ...
Sent from my OnePlus 6T using XDA Labs

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Testing and report
Thank You for this Great JOB
---------- Post added at 07:32 PM ---------- Previous post was at 07:10 PM ----------
steadfasterX said:
For those interested I will also provide SHRP (skyhawk recovery) after some testing and fine tuning ...
Sent from my OnePlus 6T using XDA Labs
Click to expand...
Click to collapse
Migration from Lineage Jed for LOS 7.1.2
Recovery 3.3.1.1 Ok
installation Ok
Magisk Ok
Google Apps Ok
Fist Boot Ok
Wifi and sensors Ok
OpenCamera working Perfectly
ROM stable Ok no errors in all files i recomend this release for all users Galaxy Tab T285
Great Job Great ROM.
Hacker.

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May I know how do I flash your TWRP build? I am using Odin and I am supposed to flash .tar.md5 file right? Yours is in disc img file and when I try to extract / mount it shows "corrupted file".

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nicktsh said:
May I know how do I flash your TWRP build? I am using Odin and I am supposed to flash .tar.md5 file right? Yours is in disc img file and when I try to extract / mount it shows "corrupted file".
Click to expand...
Click to collapse
Ah yea I haven't uploaded the ODIN file yet. Thanks for reminding. You can either wait for that or flash any of the other available TWRP versions for the smt285 which have a ODIN package. Once you have TWRP you can simply flash my img from within TWRP to update .
Sent from my OnePlus 6T using XDA Labs

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Great piece of work, very much needed. Thanks Bro.
I wished if volte would have worked, is there any chance!
---------- Post added at 07:24 AM ---------- Previous post was at 06:33 AM ----------
Getting CTSProfile false in Magisk 20.4, any fix ?

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रRudra said:
Great piece of work, very much needed. Thanks Bro.
I wished if volte would have worked, is there any chance!
---------- Post added at 07:24 AM ---------- Previous post was at 06:33 AM ----------
Getting CTSProfile false in Magisk 20.4, any fix ?
Click to expand...
Click to collapse
VoLTE is always a pita. So no.
Will check cts profile, should be fixable ..
Sent from my OnePlus 6T using XDA Labs

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steadfasterX said:
VoLTE is always a pita. So no.
Will check cts profile, should be fixable ..
Click to expand...
Click to collapse
ctsprofile issue solved, I can share the solution if u need! Thanks

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रRudra said:
ctsprofile issue solved, I can share the solution if u need! Thanks
Click to expand...
Click to collapse
Fingerprint .. I just need to add it but if you can share the exact one from stock it saves 2min for me
EDIT: nvm got it.
Sent from my OnePlus 6T using XDA Labs

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I recently flash the rom, mobile data to long to open. Thank for this, still finding bugs

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Having trouble flashing a custom recovery. Odin doesn't seem to like me. Could anyone help me out?

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Installed - works fine but found one annoying bug - lockscreen is not rotating at all - it's only vertical and not want to rotate to horizontal when I rotate device.

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how to install this ?
im having error on flashing it through twrp 3.1.1.1 it states error 7

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jayrakiztah said:
im having error on flashing it through twrp 3.1.1.1 it states error 7
Click to expand...
Click to collapse
use the latest TWRP linked in the OP.

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steadfasterX said:
use the latest TWRP linked in the OP.
Click to expand...
Click to collapse
twrp 3.1.1.1? it is already installed

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jayrakiztah said:
twrp 3.1.1.1? it is already installed
Click to expand...
Click to collapse
nope. 3.3.1.1 is the latest and it is linked in the OP
.-

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steadfasterX said:
nope. 3.3.1.1 is the latest and it is linked in the OP
.-
Click to expand...
Click to collapse
i flashed your sharp recvoery and it still got an error 7