yashsingh1/xdaforums huggingface dataset:
[Nexus 7 General] machmanx:
What I got....later

Wow didn't know there was an active Car Tablet Nexus 7 thread going on. Maybe I can throw in two cents...or more :cowboy:

(If anyone is interested I could post my setup)

You really can't do much about this as it's the difference between quickly turning your key to starting the engine vs waiting 2-3 seconds, which is what I do as well :p . Sometimes I get the power off screen and I simply cancel it. But if you want a hardware solution, the device is called a "Delay Off Switch". I can point you to this:

For the hardcore electronics ppl: https://www.youtube.com/watch?v=gQ37vljpHKs

(Use a 200uF capacitor to get a few seconds of ON time)

For the quick fix (but shipping is slow): http://www.ebay.com/itm/12V-DC-Dela...rn-off-Switch-Module-with-Timer-/121672288303

(Input connects to 12V, output supports a wide variety of voltages. It's basically a switch)

I use a USB DAC on my setup but also I have it connected to a USB isolator before connecting to a hub. My isolator:

https://www.circuitsathome.com/products-page/usb-interfaces

(No longer has assembled ones. But a google search might reveal other USB isolators.)

Keep in mind that the isolator doesn't support USB 2.0! Which is why I have it connected to my USB DAC only, which is all that needs filtering anyway.
[Nexus 7 General] fr4nk1yn:
I saw this awhile ago but never posted. Say company I bought my tablet mount from: Reboot Suppressor http://goo.gl/0lerwX

[MENTION=4450809]machmanx[/MENTION] interesting drvice. What DAC do you have? The 100mah supply worries me. The UCA202 is listed right at that.
[Nexus 7 General] machmanx:
I have the Hifimediy Sabre U2 Asynchronous DAC (old version).

As for power, you shouldn't have to worry as much because current is drawn, not received. Which means the UCA202 will pull as much current as needed and not draw out the full amount of your power supplying component. PSU efficiency is another matter altogether.
[Nexus 7 General] schweigster:
I cannot find how to enable fast charge with oxydo. I've tried kernel auditor and trickster mod. I also enabled the setting via the usb host folder in sys. Can you elaborate how you enabled fast charge? My setup in my car is charging slower than it drains. I have it powered from a head unit behind the tablet. Thanks.
[Nexus 7 General] machmanx:
Install the Power Event Manager or PEM (somewhere in the Autodroid 1.2 thread or oxydo-revamped kernel thread) and SuperSU. When setting up PEM, make sure that when you change the "Fixed Install Mode" setting that you actually get a warning for permissions granted for that app. You might have to mess and tinker around with that app until it works though.
[Nexus 7 General] tesna:
so just recently I add an USB-DAC into my setup, making me requires to get OTG stuff enabled. The default kernel on CM12.1 does not support it, flashed oxydo revamped but boot looped :(. I really need charging via OTG stuff so I installed Autodroid 1.2 on mine, but still OTG charging does not work on default kernel. Flashed oxydo revamped now otg charging + usb audio works! and I'm happy... but sometimes I found out that the PEM does not always make the tablet auto sleep :S, cannot figure out why.

So I tried to flash kangoroo kernel v2, now the tablet always sleep on power loss :) but the downside... the tablet does not always wakes up :S (50% works fine, 50% ends up dead) I had to push and hold the power button to revive the tablet back to life. Tried to reinstalling few times but same thing happen. So I'm wondering what's everyone else setup like, what did I do wrong?

EDIT: so I tried to flash CM12.1 with all ext4 with oxydo revamped kernel and now seems working fine (autosleep, auto on, usb-dac, etc) except the firm sleep option. The stock kernel of CM12.1 able to use f2fs on /data and /cache partition. I guess this will be my setup for now.... (I really miss media buttons on the navigation bar tho)
[Nexus 7 General] SiK TL:
I'm in the same boat with you. I had to ditch PEM. I ended up using Chroma ROM with franco.kernel. What CM12.1 did you use? Also which version of oxydo revamp kernel worked for you? I'm looking to get OTG working correctly on Nexus 7.
[Nexus 7 General] tesna:
I tried both CM12.1 nightly (latest) and the snapshot version both are working fine with also the latest oxydo kernel. But I found a major drawback for me making me trying out another rom/setup. Everything is running perfectly, including the PEM. Until I had to do a reboot. The audio never routed thru USB-DAC if the tablet is connected with OTG-cable during booting. The tablet needs to be booted with OTG-cable disconnected from the tablet, then if I plug the OTG cable after boot the audio routed thru USB-DAC fine. This is will be difficult for car install, it means I had to disassemble the dash (to unplug the otg cable from the tablet) after each reboot.

On autodroid or usb rom I never ran into this issue. I wonder is there's any settings to enable usb-dac to be hot pluggable? This is the only problem I experience on LP rom
[Nexus 7 General] tesna:
Another update, so I tried to go back to Autodroid and things works fine so far for a while, but I noticed something different in the sound output. I am by no means audiophile but I noticed the music playback sounds better when I was running LP, especially when playing flac files. I was thought, am I crazy? Placebo effect? Then I tried to flash usb rom, sounds relatively the same compared to Autodroid.

Out ouf curiosity, I flashed nandroid backup of my CM12.1 install........ and immediately notices the difference. After researching around it seems on LP renders the audio at 96khz, and it's confirmed by looking at the stream0 file in /proc/asound/card2/stream0 file

FiiO DigiHug USB Audio at usb-tegra-ehci.0-1, full speed : USB Audio
Playback:
Status: Running
Interface = 3
Altset = 2
URBs = 2 [ 5 5 ]
Packet Size = 582
Momentary freq = 96000 Hz (0x60.0000)
Interface 3
Altset 1
Format: S16_LE
Channels: 2
Endpoint: 3 OUT (ADAPTIVE)
Rates: 32000, 44100, 48000, 96000
Interface 3
Altset 2
Format: S24_3LE
Channels: 2
Endpoint: 3 OUT (ADAPTIVE)
Rates: 32000, 44100, 48000, 96000

On the same file on KK/JB the rates always at 44100.

Guess I'm going to stick with LP now and hope I will never restart the tablet lol....... Anyone know how to patch the rom for enable usb audio even when the OTG cable is plugged during the boot times on LP? I guess this is enabled on timur's for nexus 2013 so this should be possible on LP....
[Nexus 7 General] kiepas96:
Hi i recently installed nexus 7 in my car, but i have a few problems, maye someone can help me

Nexus 7 wifi 2012

twrp 3.0.0.0

Chroma rom 5.1.1

kernel oxydo revamp #3-4.9 which version is newest/stable?

supersu 2.4.6

pem 1.8

tasker profiles

stickmount

usb otg y cable from ebay and one which i made my self (pins 4+5)

- sudden ubs stick unmounts

- random freezes and restarts

- sometimes dont wake up from sleep

- a lot of noises from nexus
[Nexus 7 General] SiK TL:
Your problem is going to be PEM. I had to ditch it and used MacroDroid to automate the tablet powering on/off
[Nexus 7 General] kiepas96:
updated to BSZA newest build full wipe, still te same with usb

i will try that macro droid

how do you set up cpu and which app?

what about host mode and charging?
[Nexus 7 General] SiK TL:
I'm using Chroma 5.1.1 with franco.kernel. he doesn't condone tweaking the CPU through the kernel. So I just left it alone. On other ROMs I run ElementalX and I use his own app to tweak kernel settings.
[Nexus 7 General] kiepas96:
how about usb host and charging at the same time with franco kernel?

Someone posted a timurs kernel for 2013 nexus

in archives there is a updated PowerManager will try it tommorow

https://turbolec.wordpress.com/

edit: newer version of pem works better for me

is there any chance to lock usb stick when device is going to sleep? anyone solve that problem?
[Nexus 7 General] alexandru.j91:
hello guys , i have made a custom center console for my golf mk4 it is a side slider ( I can remove tablet when I want),but i have a problem with the tablet , i need the option to wake up screen when charging . I am using slim rom and it doesn't have this option , on cm12.1 it had this opption ..tx[IMG="golf mk4 dashboard"]http://s10.postimg.org/ar6latwg9/12509575_503158206531050_560748332446265916_n.jpg[/IMG]
[Nexus 7 General] Comprox:
Hey, not sure if this is the best place to ask, but I need help getting an amp. I have an OTG cable coming out of the tablet and into a DAC converter. Is there a known good amp that I can bridge the gap between the DAC and radio harness that will fit behind the tablet in the console?

Thanks!
[Nexus 7 General] fuzzie:
Not sure if this is the place to ask...

I have a Beringer DAC installed

http://www.amazon.com/gp/product/B0023BYDHK

My OTG connection seems to be very finicky.

Sometimes audio and power work.

Sometimes just audio works.

Sometimes power.

I've tried several OTG cables. Thought the port might be bad, so I returned the Nexus 7 and tried a new one.

I've tried a powered-USB hub.

Right now, I'm running ElementalX and CM12, but I have tried stock, and CM10-13. With the same result.

Trying to get Timur's Kernel to install...maybe that will fix it.

Anyone else having that issue?
[Nexus 7 General] shantur:
If anyone is interested in Android 6.0 for using in Car I have ported the usb changes from Oxydo kernel to DC-Kernel and use OmniRom-HOMEMAKE. Its working well and it has got Double Tap to Wake as I don't keep the screen on 100% of time. Thanks to [MENTION=4948627]daniel_hk[/MENTION] for his good work.

To use it you will need to

1. Install latest OmniRom from the thread and install SuperSU Systemless Root as mentioned in thread.

2. Replace boot image with the one link in fastboot mode : Link to bootimage

fastboot flash boot boot-usb-host-charging.img

3. Follow steps in OP for Oxydo Kernel / Lollipop.

- I use PowerEventMgr-1.8.apk for enabling the hostmode charging and fast charging in host mode and fixed install mode.

- MacroDroid for switching off the tablet if not powered and screen is off after 1 minute of loosing power. In this way my tablet is still charged even when I am not driving for a couple of days. Macros in the bootimage link

- Disabled off-mode-charging to power up tablet when usb is powered up
[Nexus 7 General] fr4nk1yn:
I'll be catching up with the thread.

While I'm using a '13 many of the things I've encountered will cross over to the '12. Maybe, the processor is still quite limited.

Will give this a try.

The problem is USB audio IS very finicky. I often had to reboot just to get it going again.

There's many on amazon that will do this. Alpines seem to be popular.

My experience with Timur's has been quite positive. He's a little short when it comes to bug reporting, but the kernel does better than the alternatives.
[Nexus 7 General] virtualspeed:
Hi,

How do you open PowerEventManager? I installed the app but it's nowhere to open. It doesn't show in app list.

I'm also unable to convert it to system app with TB...

edit: how do you enable usb charging with Y OTG cable?

I flashed the boot image you provided but it doesn't work

thanks
[Nexus 7 General] donjamal:
hi guys, i removed the battery from my nexus 7, i put it in the car directly from cig lighter charger. the screen sometimes goes fully black, then other times it goes all white or green and the only solution is to remove the power source, wait a bit and plug it back in. what can cause this? if i plug it into the charger at home, i don't see this happening. i left it on charger during the whole night and in the morning it was still running. i tried it with a power bank and the result is the same, it goes crazy...
[Nexus 7 General] ponitsoua:
You should use the battery. It helps the tablet work on the corrent voltage range. The car voltage is different and it is depending on the rpm the motor is running something that is not happening with a wall charger maybe that is your problem.

(Also the cigarette lighter on most cars does not have a good chassis ground)
[Nexus 7 General] virtualspeed:
It happens the same to me feeding the tablet directly from the battery with a common 12V to 5V adapter. I bought a DC DC voltage step down converter and will set it to 3.9V (common voltage of fully charged li-on batteries). I also plan adding a big capacitor to the 3.9V side to maintain the current stable. Lets see if this works.

edited
[Nexus 7 General] fr4nk1yn:
I'll take a look on Timur's forum and see if there an outside link I can post. That's not an uncommon mod.

Quick idea though is your adapter, try another one.
[Nexus 7 General] donjamal:
yes, but i can't charge it fast enough and it always dies on me. also, it gets freaking hot

---------- Post added at 04:40 PM ---------- Previous post was at 04:39 PM ----------

i'm waiting for my stabilizer to be built by one of my friends but he is taking his time, lol :D
[Nexus 7 General] virtualspeed:
Yep. letting the battery inside the tablet, specially if you live in a hot country during summer like me, is a good way to set your car on fire!
[Nexus 7 General] ponitsoua:
Was the sun directly hiting the table?
[Nexus 7 General] virtualspeed:
It's not my tablet but lithium batteries don't like heat and when the car is parket in the sun the temperature inside de car can reach 90ºC
[Nexus 7 General] ponitsoua:
Are you living inside a volcano or something? [emoji12]

When it's directly on Sun the surface is not exceeding 55-60C even the metal ones. Most li-ion batteries are operational till 60C and some can even reach 80C.

I believe that something else happened to that tablet not just the heat
[Nexus 7 General] Spillunke:
hi, how can i disable "fastboot oem off-mode-charge 0"?

i tried "fastboot oem off-mode-charge 1", but it always showing <waiting for device> and nothing happens.

what i have to do?
[Nexus 7 General] fr4nk1yn:
fastboot drvices shows the tablet?
[Nexus 7 General] Spillunke:
i forget to install the drivers. now it worked :) sorry for that stupidness.
[Nexus 7 General] x_zao_x:
I have an easy cap capture USB device installed with a rear view camera and the easycap viewer software. The camera works perfect, but for some reason i can't get the actual software to auto detect when i shift to reverse. Can i get Tasker to auto launch the software when it detects the signal and minimize when the signal is gone?
[Nexus 7 General] virtualspeed:
i installed this but the problem is the capture usb device detects noise and that is considered signal so i cant use the signal method...

i ended adding a relay connected to the reverse light to activate the 5v on the usb device.

https://play.google.com/store/apps/details?id=com.easycap.viewer&hl=pt_PT
[Nexus 7 General] sara.ramli:
This was awesome and I am now using this as my daily driver. Could you please upload the merged version to github, so that further improvements made to dc kernel can be merged into this?

Thanks a ton.:svetius:
[Nexus 7 General] shantur:
Its already merged with dc-kernel

https://github.com/danielhk/android_kernel_asus_tegra/commits/android-6.0
[Nexus 7 General] MiSieeQ:
Hi everyone! I have my nexus 7 installed in the car, it has the timur's USB rom and it is connected to the speakers through the FiiO e10 DAC, but here is the problem - the potentiometer does not seem to work, the volume's level is always constant, the volume is too low thereby ;(

any hints - is it the dac, or something that should be made within the nexus?
[Nexus 7 General] x_zao_x:
How would a relay trigger the app or Tasker to launch the appropriate app?
[Nexus 7 General] sara.ramli:
Thank you, didn't realise that. That's ideal.
[Nexus 7 General] sankipanki:
So what's the best?

So as of today, what's the best combination of ROM/Kernel for a fixed install on a car of the nexus 7 (2012) Grouper, with lollipop 5.1.1? Taking into account the USB OTG charging and USB audio known issues.
[Nexus 7 General] abhifx:
i am now on CM13 and my install would involve just tablet pop with magnet holders and aux connection (and obd2)

Can someone suggest me a good interface how to? i am using car dashboard but i am looking for something for elegant and functional.
[Nexus 7 General] yldaedroid:
Personally, I could not find anything I liked. What I ended up using was Nova Launcher, setting the icon size to 150% and making the grid size 5 wide by 4 tall to make everything nice and big. I like it.
[Nexus 7 General] PutoFace:
I'm currently using a seat-bolt mount for my Nexus 7 Grouper with just simple aux cable and 12v cigarette lighter outlet charger. Works nice and doesn't take up any viewing area from the windshield like suction-cup mounts would; also more discreet than just having the tablet in clear view.

Robust Seat Bolt Tablet Car Mount on Amazon

ROM: GtrCraft's Unofficial PureNexus build with ParrotMod (no voice recog, but fastest build I have tried)

DashApp: AutoMate (very customizable, even in free version, and also most aesthetically pleasing IMO)
[Nexus 7 General] abhifx:
what have you done for the UI? i am thinking of multi screen interface since i will be connecting it with OBD also. for mounting i will be using neodymium magnets.
[Nexus 7 General] bnr32jason:
I think this thread is way beyond what I need, but I figured I would ask here.

I'm going to use my old Nexus 7 2012 as a Waze device 99% of the time. I might browse the internet occasionally or play YouTube or a video or something, but it will mostly just be for Waze while driving. So I've got my tablet, mount, Anker charger from Amazon, Anker 1ft cable from Amazon for charging, and that's all I really need. Which ROM and Kernel should I install to get the fastest possible response and lowest battery usage while idle? I don't really want to turn the tablet on and off each time, unless there is some kind of quick booting ROM, because right now it takes a good 60-90 seconds to boot (guessing). Any advice would be appreciated!
[Nexus 7 General] donjamal:
after removing the battery, the tab should power up when plugged in - i enabled it via fastboot. now sometimes it does not turn on and i have to keep unplugging and plugging it in again until it decides to work. what could be the issue?
[Nexus 7 General] PutoFace:
I just use the interface from the AutoMate app. Very customizable.

---------- Post added at 12:36 PM ---------- Previous post was at 12:30 PM ----------

http://xdaforums.com/nexus-7/development/unofficial-pure-nexus-project-layers-t3243943
[Nexus 7 General] donjamal:
AutoMate annoys the **** out of me, especially that waze is not integrated, only google maps. it would be a good concept though. but i miss information about my vehicle when i have obd connected and all those stupid notifications are so annoying. i swipe them away, please don't come back in a minute. other thing i don't like about it is that it can't connect to my phone to at least show me who's calling or from whom i get the messages from.

so in general, i can't wait for Android Auto to be available on tablets as well and to be able to show me at least the caller id... would be even better if i could answer the damn thing through it, so i don't even have to take out my phone (unfortunately my car doesn't have any solution for this, Mazda just did not bother in 2003 :) )
[Nexus 7 General] PutoFace:
I have a grouper (WiFi, no cellular), so I dont really care about calls since I cant receive them on the tablet without using an app like Google Voice or Talkatap. I use Google Maps over Waze anyway, personally.

Doubt Android Auto will get support for tablets as its purpose is to connect phones to car head units.
[Nexus 7 General] donjamal:
yeah, but i read somewhere it's going to be released for phones, so my guess it's going to be released for tabs as well.

i tried talkatap to answer and receive calls but it did not work for me :(
[Nexus 7 General] furious84:
Tapatalk link tablet with phones so, if u receive a call on the phone (or a sms) u can answer using the tablet.

Inviato dal mio Nexus 7 utilizzando Tapatalk
[Nexus 7 General] abhifx:
anyone knows any other application where i can dial or recieve call from tablet connected thru phone? talkatap is not available in my country.
[Nexus 7 General] furious84:
If you search on play Store, talkatap must show similar app, which do same thing, maybe. Where You from?

Inviato dal mio Nexus 7 utilizzando Tapatalk
[Nexus 7 General] abhifx:
I am from india. and i fail to any replacement app on playstore. any help is appreciated.
[Nexus 7 General] furious84:
I m not sure if work, but try To search directly the installer on some forum, And not by playstore. I try To search some app do same work

Inviato dal mio Nexus 7 utilizzando Tapatalk
[Nexus 7 General] mvez73:
Hi everybody. I'm new to this thread and i found some usefull infos. I have a Nexus 7 2012 for more than a year and i tried some roms (CM, Candy5, XenonHD) and almost everything was ok. I decided to test Omnirom 6.0.1 Homemade and so far i realy like it. The only issue i have is now when i turn the knob on the radio it control the volume on the tablet. I had this problem one time before but i don't remember how i solved it. Before the volume of the talbet was at max and i controled the volume of the radio. Sorry if it's not clear i speak french. if you want more information ask me and i will provide you what's needed.

Last thing is when listening music in my car even if the tablet is plugged the tablet is discharging slowly. I have to let the tablet plugged almost 24/7 to keep it near full charge. My charger is 3.1 amp (2.1 + 1) and obviously i use the 2.1 slot.

Can you help me or give me some advice? Thank in advance for any help.
[Nexus 7 General] Emil Borconi:
[MENTION=2313795]donjamal[/MENTION] this is for you as well.

You can use Android Auto on your Nexus, actually you can use it to answer the calls from your phone as well, see thread: http://xdaforums.com/general/paid-software/android-4-1-headunit-reloaded-android-t3432348
[Nexus 7 General] donjamal:
well, i tried it and it doesn't work, none of the possible options to connect. i don't know, i might be doing something wrong :( i have a honor 7, stock and a nexus 7 (12) running pure nexus rom. but thanks for the tip!
[Nexus 7 General] Emil Borconi:
Feel free to contact me in private or on the forum thread for support. I keep a stock Nexus 7 for test purpose and I can assure you it work well. Here are some possible causes of not getting it to work and some possible fixes:

1) USB

- Bad cable - Enemy number 1!

- If your Honor 7 is running M or higher it might not be able to switch to accessories mode. You can try to open the app and only than connect to usb cable. If your Nexus 7 is rooted you can try the Force USB button (that should work in almost every case). If you are using M or higher on your Honor, you should try to manually switch to MTP when the USB cable is connected.

2) Wifi

- This method should work in all cases, the only problem which can occur here is different IP, for example most of the phones when they tether the Wifi, the default gateway will be 192.168.43.1, but recently I found out that HTC is an exception, the default gateway is 192.168.1.1 so you need to adjust the app to use that IP.
[Nexus 7 General] mvez73:
Is the call going to the tablet and then to the car speaker? Like if we had a bluetooth in the car? Sorry if i'm not clear i speak french.
[Nexus 7 General] Emil Borconi:
Nope, the audio of the phone call will be outputted on the phone speaker or if the phone is connected to a bluetooth handsfree than it will be outputted the the bluetooth handset.

All other media sounds (navigation, spotify, tunein radio, etc) can be configured to either go to the tablet and from there to the car speaker, either stay on the phone. If you chose to keep the media audio on the phone and you have an A2DP connected to the phone than all the media will be played back through the A2DP, hope it makes sense.