갤럭시 그랜드 동생 장난감으로 주려는데 너무 렉걸려서 루팅하고 커펌올린뒤 오버클럭하려고 맛클 가입했습니다.
그런데 자유게시판에 글을 하나 써야 다운받게 시켜준다네요... 그래서 이거라도 올립니다.
작년 12월 즈음인가 Ebay.ca에서 Kobo Rakuten 셀러가 arc 시리즈 태블릿을 무료배송으로 CDN 50$으로 떨이를 한적이 있었습니다.
그때 Kobo glo랑 7 HD랑 10 HD 이렇게 태블릿 두개랑 전자책 하나를 샀었는데 10 HD는 성능이 썩 괜찮아 Kodi를 설치해서 NAS에 연결해 영화보기 좋은데
7인치 HD 모델은 성능 자체가 후달리는데다 올려놓은 롬도 발적화가 심해 렉이 걸리더라구요. 그래서 루팅하고 리커버리도 커스텀으로 올리고 오버클럭한 뒤에 사용해보려고 합니다.
다음으로 나오는 강좌는 redflagdeals.com에서 활동하시는 Glancealot 님의 영어로 작성된 강좌에 윈도우 10의 파워쉘에서 나오는 형식으로 명령어를 수정한 것이니 착오 없으시길 바랍니다.
영어중에 이해 안가시는건 댓글로 물어봐주세요.
Here are the steps I took to make my K7H into a bookreader with full browsing capabilities with a superb battery life.
***start of preparation***
(you need to re-perform preparation if you screw up and brick your K7H at any time during this guide)
download mfastboot-v2.zip from here
https://androidfilehost.com/?fid=95916177934532795
if this link above expires, google mfastboot-v2.zip and i am sure you can find a valid one somewhere.
the zip is 1.36MB and should contain the following 7 files:
AdbWinApi.dll
AdbWinUsbApi.dll
linux-fastboot
mfastboot.exe
osx-fastboot
aapt.exe
adb.exe
**extract all contents to a new folder on your desktop, let’s call this folder HOME folder from now on.**
next, download
http://download2.kobobooks.com/apollohd/update-ota339.zip
if this link above expires, google update-ota339.zip and i am sure you can find a valid one somewhere. it is 382MB.
and copy/move it into HOME folder
fully charge your kobo
reset your kobo by pressing the power on (PO) button and then immediately pressing the volume down (VD) button, you should then be brought to K7H’s system recovery interface, choose wipe data / factory reset by pressing VD twice, and then press PO. then pressing VD 7 times until you are at “Yes”, then press PO again. then wait for it to finish.
next connect your kobo to your PC with the USB cable that came with K7H. on K7H, press VD once to select “apply update from ADB”, press PO, and you are brought to a waiting screen, at the same time, the computer will install necessary drivers needed. on PC, hold down Shift key and right mouse click in HOME folder and select “Open command window here” (make sure you don’t have any file highlighted), in the command window, type
**adb sideload update-ota339.zip**
this should bring you to this screen within the command window on your PC
one comment: feel free to disconnect and reconnect K7H to your PC a couple times if you encounter error messages such as “error: device not found” “daemon not running” etc after you type adb sideload update-ota339.zip
on K7h, it will install the firmware and a couple of yellow lines will appear and the final yellow line should say “Install from ADB complete.”
next, reboot system now should be automatically selected, simply press PO to restart your K7H.
***end of preparation***
your K7H will be stuck at the Kobo screen for a while, be patient. once your tablet is booted up, you need to go through the whole registration/update process. this part doesn’t require any guidance, although it may appear you can only do this with a kobo account, so register one on your PC.
once you are in, press the bottom right icon to go to apps, select settings, scroll to the bottom, select
“about kobo arc 7HD”, tap on “build number” 7 times to activate developer options.
go back to settings by press the back-up key at the bottom left corner, scroll to bottom
select “developer options”
checkmark “USB debugging”
uncheck “verify apps over USB”
go back to settings by press the back-up key at the bottom left corner, scroll to bottom,
select “security”
checkmark “Unknown sources”
uncheck “verify apps”
now download **tr_old.apk** from here and save it into HOME folder.
https://forum.xda-developers.com/attachment.php?attachmentid=2843562&d=1404980556
if this link above expires, google tr_old.apk and i am sure you can find a valid one somewhere.
on pc, hold down Shift key and right mouse click in HOME folder and select “Open command window here”(make sure you don’t have any file highlighted), in the command window, type
**adb install tr_old.apk**
again, feel free to disconnect and reconnect K7H to your PC a couple times if you encounter error messages such as “error: device not found” “daemon not running” etc. please note that, you can use this method to install WHATEVER app onto your K7H, even ones not meant for android 4.2.2, as long as you can download the apk of the app, you can get apk of apps by using google or from certain reputable sites like https://www.apkmirror.com/ or https://apkpure.com/ or https://www.apk4fun.com/ and etc.
now go to apps on K7H, open the new app towelroot, press the “make it rain” button and wait for K7H to reboot, **now your K7H is rooted.**
now on K7H, search for **SuperSU** by CodingCode from the google **play store** that you can access by going into apps (again, press the bottom right icon to go to apps), sign in using your google account, it should be the first result returned. please note that, your Kobo might restart on its own, as it is busy updating all kinds of softwares now that you signed into the playstore, as its CPU is quite slow and is easily overwhelmed. once things settle down, open SuperSU, press start, choose continue when it asks for binary needs update, choose normal when it asks the other question.
next, download **recovery.img – [Click for QR Code] (6.54 MB)** from here into HOME folder.
https://forum.xda-developers.com/showpost.php?p=47024957&postcount=4
assuming your K7H is still connected to your PC, on PC, hold down Shift key and right mouse click in HOME folder and select “Open command window here”(make sure you don’t have any file highlighted), in the command window, type
**adb push recovery.img /sdcard/**
then type in the command window
**adb shell**
then type in the command window (make sure the screen of your K7H is turned on)
**SU**
a box will popup on K7H (i.e., look at your tablet), make sure you select “GRANT”
then type in the command window (by the way, you can always right click and select paste when you are in the command window)
**dd if=/sdcard/recovery.img of=/dev/block/platform/sdhci-tegra.3/by-name/SOS**
Next, in the command window press Ctrl key and C key as if you are copying something
then type in the command window
**adb reboot recovery**
now your K7H will restart
you will notice that the interface is different from earlier during the preparation step, “reboot system now” should be highlighted, press PO button, press VD 7 times to highlight
“Yes, disable recovery flash”
then press PO button.
**now your K7H has the Recovery Mod.**
next. search for nova launcher from the play store that you can access by going into apps
(again, press the bottom right icon to go to apps) and install the free one.
once it’s installed, press the HOME folder button of your K7H (middle button of the three virtual buttons on bottom left), select Nova launcher and make sure you select Always.
now go to play store and search for **titanium backup** install it. run it and select “GRANT”.
go through some menus where you always press “OK”.
if you ever get stuck at the Kobo screen with three dots for a while, just connect K7H to your PC, hold down Shift key and right mouse click in HOME folder and select “Open command window here” (make sure you don’t have any file highlighted), in the command window, type :
**adb shell input keyevent KEYCODE_HOME**
please note that the above command is case sensitive, i.e., KEYCODE_HOME must be capitalized
last thing, the screen is really bright at night, even when i adjust the brightness to minimum. so i figured out a way to adjust it further. install **f.lux** either through adb install or through app store, change the color driver to **tegra** and you are good to go.
if you are an advanced user, you can use **titanium** to uninstall A LOT of things.
i am not advanced, but through some trial and error, i managed to delete a lot of things, such as the drop down menu when you swipe at the top, and a lot of other things. doing this helped me extend the battery life to 10 days ([2 day 14 hour * 4](https://i.imgur.com/YNBwXMk.jpg)) with daily book reading and / or light browsing before bed, the standby battery life is around 20 days.
the system navigation bar also takes up a lot of screen real estate with its default status bar(top) and navigation bar(bottom), the difference is night and day, compare the following two images:
first is on a K7H where I got rid of both the top bar (no need for it really), and bottom bar (replaced system UI with [this app](https://play.google.com/store/apps/details?id=com.dogusumit.ortatus&hl=en))
second is on a regular K7H.
(don’t pay attention to the large font, I set my text to large under accessibility)
the top bar and bottom bar together take up around 13% of screen real estate by my calculation.
btw, I learnt how to take SS of your tablet screen under adb (the above 2 SS are not taken with a camera like earlier), hold down Shift key and right mouse click in HOME folder and select “Open command window here”(make sure you don’t have any file highlighted), in the command window, paste the following code and the screenshot should be under your HOME folder.
adb shell screencap -p /sdcard/screen.png
adb pull /sdcard/screen.png
adb shell rm /sdcard/screen.png
here is a SS of K7H running Moon+ Reader Pro
2018년도 6월 14일 작동 잘됩니다. 참고로 7 HD 모델은 그 어떠한 커롬도 만들어지지 않았습니다. 그냥 루팅하고 커스텀 리커버리 올리는게 한계임을 미리 알려드립니다. Kodi도 15.1 버전을 사용해야 쾌적하게 사용할 수 있습니다.
그렇지만 10 HD 모델은 Cyanogen 12.1이 올라가는 것으로 알고 있습니다.
