yashsingh1/xdaforums huggingface dataset:
[Nexus 7 General] fr4nk1yn:
My current setup [Edited 09/18]:

Stock lollipop, from factory image, rooted, with Oxydo-Revamp kernel.

All apps not suitable for stand-alone tablet use have been removed. Debloat list is above in post #2.

Power Event Manager installed as system app.

Es File Explorer for file management, and ftp file transfer.

$3.50 OTG cable from Amazon. Charging seems severely hampered. Tablet and phone both occasionally discharge.

OTG is now handled by the 2nd cable listed in the OP with Amazon Basic USB extensions. Charging problems fixed.

Cheap USB 2.0 hub with independent power. Simple and impressive mod.

Torque Pro with a ELM327.

Tasker. To kill apps and use Power Event Manager to put the tablet to sleep.

Now using my Power Event Manager Helper app.

Behringer UCA202 to stock stereo AUX input: This is an incredible mod. Highly recommend over bluetooth.

Notes:

Torque can keep the phone awake if configured improperly.

Leaving ES File Explorer in FTP mode will also cause a partial wakelock.

Google Play Services, and Google App are causing wakeup triggers every 2-3 minutes.

Power Event Manager combined with Oxydo kernel is putting the tablet to sleep reliably.

Power Event Manager isn't terribly reliable. The Tasker profile is set to kill apps and call PEM for when PEM alone fails.

My awake time with stripped system and Tasker is consistently 0% over 24 hours. Longer periods show Tasker awake for 2s!

Settings:

I use Synapse and UKM TricksterMod for kernel management. Since battery life isn't a primary concern, my settings are to maximize the tablet's performance.

Turning the Nexus7 into a "terminal" is about the only hope it has to run Lollipop.

Tablet can run music, maps, and youtube flawlessly. Chrome appears to be the biggest problem app.

CPU Minimum frequency is set a 640MHZ 340MHZ,

Maximum 1624MHZ 1500MHZ,

Ondemand Governor.

Splitting the power to use two chargers is super simple when you figure it out.

Open the hub,

Remove the red wire from the PCB, and tape it off.

Connect a salvaged USB cable's red wire to the where the previous was,

Connect the new black wire to the PCB with the existing black wire.

Green and white wires on new cable are not used.
[Nexus 7 General] tesna:
Whoa, mine if using stock lollipop is barely usable (too slow especially when multitask). Then I installed tiimut'r usbrom it's a lot bettrr (but then I needed the inmersive mode).

Current setup is slimrom (slimkat 4.4.4), all converted to all-f2fs. I dont need usb host stuff (yet), so far i'm satisfied with it. Use macrodroid for auto on/off stuff, automate as launcher, google maps for navigation, spotify/poweramp for music, and dash command for obd2 stuff.
[Nexus 7 General] fr4nk1yn:
I ran into the multitasking bit while setting up , everything last night.

With Torque and Headunit, running as it would in the car it's perfectly usable.

Open chrome, settings, es file explorer, and Ampere and it falls apart. Chrome is the biggest problem though.

How does Dash Command run for you? I've tried it, and seen many, that say the refresh rate is slow.
[Nexus 7 General] tesna:
I had issues even opening up Google maps while in lollipop, soooo sllooooow. I only able to open maps, or music, or OBD stuff, cannot run them together. Now on kitkat I can run at least 2 apps simultaneously without any issues (like maps and music, or music and OBDII stuff). I did get issues when running three apps (music, maps, and obdII stuff). As for dashcommand, the refresh rates is quite ok for me. I like dashcommand morecompared to torque since it has nicer layout/themes out of the box. It's like having GTR multi information display that looks very factory.

I have another irritating issues though. If the nexus7 battery nearly full (above 90%) and charging. I hear a lot of strange noises, even when the engine is off. I touch the screen, doing any activities creates a lot of noises. if I disconnect the charger the noises are gone! and if the battery was like at 50% and charging no funny noises either. I was wondering how do I fix this.....

My setup is using the aux output of the nexus 7 to aux input of the factory bose head unit. Tried to use bluetooth to aux adapter but I did not like the sound quality (too many hissing noise) and also introduces alternator whine :(

Should I get the USB DAC thing?
[Nexus 7 General] fr4nk1yn:
I'm sure lollipop is working so well because of everything I stripped out of it. I'm about to strip some more. Was working on gauges for torque. I'll give Dash Command another try though. It does look much better.

I'm still getting my cables added to my cart but you need one of these for noise:

http://www.amazon.com/PAC-SNI-1-3-5...=1440642269&sr=8-1&keywords=3.5mm+ground+loop
[Nexus 7 General] gabrielbsb:
Are you using a stripped down stock ROM or you manually disabled everything?
[Nexus 7 General] tesna:
I just bought one of these.. (not exactly that brand), on mine one of the channels is not working so I only got one side audio channel only :( It also degrades the sound quality I think. I guess I need to bought the better one.

EDIT: What if I buy the ground loop isolator intended for 12volt line like this one? Install it on 12v cigarette lighter (before 12v to 5v dc-dc adapter). If this one works the audio quality will not changed as the ground is lifted on the 12v line.
[Nexus 7 General] fr4nk1yn:
Yes, A manually stripped/blocked stock ROM.

Hopefully the one I ordered works. It has a decibal increase to make up for that degradation from the transformers.
[Nexus 7 General] tesna:
I ended up ordering one of these . Let's see how it goes few days from now when the package arrives (and time to install it)
[Nexus 7 General] fr4nk1yn:
Counting on PEM to sleep the tablet might not be the best idea. It only seems to actually do it IF the tablet is charging in OTG mode.

Tablet went dead in the car during a test possibly because the OTG cable, or another cable, is malfunctioning.

Might have to go Tasker although I've never gotten it to work properly for anything, and I've never accepted it won't demolish battery polling every few seconds.
[Nexus 7 General] fr4nk1yn:
Damn. Whatever happened to my tablet it appears to be dead. Won't power on, won't reboot. May be a short lived experiment.

I've ordered hundred of dollars worth of parts for the car so If it doesn't charge by Wednesday i'll have to buy a N7'13 off CL.
[Nexus 7 General] tesna:
I use Macrodroid to manage sleep/wake up on mine. Very simple app and easy to understand.

That's too bad :( maybe try to plug in to your pc and recognize adb or fastboot or something?
[Nexus 7 General] fr4nk1yn:
I going to try it out. I'm quite used to Trigger, I haven't used it in awhile though and not for this type of power control.

Took it apart after not charging at all. Checked battery voltage, then voltage at the microUSB, tried powering it on, yet again, and it did. I did nothing different, same cable and charger. Wiggling and poking the socket it doesn't appear to have a loose connection.

My new OTG cable is on the proverbial slow boat so I can't eliminate that until early October!
[Nexus 7 General] fr4nk1yn:
Care to give your macros for power? It's time to try other methods of forcing the tablet to sleep.

Tasker, as usual, is impossible.
[Nexus 7 General] tesna:
My macro is pretty simple, I just set on charger connect, screen on, run app A,B,C Then another macro on charger disconnect, screen off, close app ABC (killing navigation apps, music, OBD stuff). You can apply also turn on/off airplane mode, turn/off mobile data, wifi AP, etc but I decided to keep them on even when not charging to track the location of my car in case my car got stolen lol. Another macro that I occasionally use is, turning off the tablet when the charger is disconnected (key ACC off). No need another macro since the tablet will auto power on when charger is connected (key ACC on).

Before macrodroid I was using condi, and it was not always working.
[Nexus 7 General] fr4nk1yn:
[MENTION=355597]tesna[/MENTION] Thanks. While playing with Tasker I found it doesn't actually cause deep sleep, just shuts down radios.

We really need a kernel with some of the newer improvements. And firm sleep.

Since my car isn't a daily driver and only goes out for relatively short trips the tablet will eventually go completely dead.
[Nexus 7 General] tesna:
[MENTION=1417981]fr4nk[/MENTION]l1yn, there's simpler solution to that problem. Just set in tasker/macrodroid to turn off the tablet once the ignition key is on the off position (charger disconnected). Bam no battery drain issue...
[Nexus 7 General] fr4nk1yn:
yeah, I'm going to have to do it. close apps and set airplane mode with screen off at power, and a timer to shut down after a few hours. Off_charge_mode will take care of the rest with screen, radios on at power on.

Having an add issue. the tablet is powering the charger, and the key circuit of the car, through the otg cable.

Further research shows its functioning just as it's supposed too. This is also the cause of the issues I was contributing to pem.

When the power is shut off while a otg device is connected, or the tablet thinks is connected, it doesn't sleep and powers the otg device, my charger, from the tablet. At that point it doesn't recognize any change in external power until its physically unplugged and reconnected.

Source, timur: http://mehrvarz.github.io/usb-host-mode-power-management-nexus7/

This leads me to believe pem isn't switching the fixed install trigger, or oxydo-revamp has a bug.
[Nexus 7 General] tesna:
Well, I dont use Y otg cable (yet), just straight plug it into a charger. Thingking to add usb-dac to improve the SQ a bit but your issue now worries me also.

Will the use of diodes work? Did you use off the shelf Y otg cable or made one yourself?
[Nexus 7 General] fr4nk1yn:
The OTG cable is basically one I bought but it was modified with longer/thicker cables.

I've found a lot of info on OTG cables and OTG in general. I'll be switching to a hub.

That will allow the tablet to be charged by one charger and the accessories will be powered independently by the hub's power supply. Here's the info on that: https://sites.google.com/site/sonicboomworld/my-projects/otg-and-charging

*actually that's not the site showing the split power supply.

I'm to going for a DAC too but that will likely change my my install. Right now the tablet is only a display getting its navigation and music from the phone through Headunit. That also allows me to use voice features through the car's microphone since I'm using bluetooth. I'll have to switch audio to the tablet and input it to the car's auxiliary, finding a way to use the car's microphone, it's wired to the auxiliary jack, with the DAC.

The UCA202 is supposed to be an awesome unit according to the market it's intended for, musicians.

It can be found at local music suppy shops for $30. It's flexible enough to be connected straight to an amp with RCA, or an existing unit through the headphone output. I'm going to try it out when my hub arrives.
[Nexus 7 General] fr4nk1yn:
Update

The 2nd OTG in the OP is the one to get! charges the tablet at 850Mah.

SOB! Not Ampere knocking the tablet out of FI. Apparently I'm getting a random crash that's doing it.

Trying a different kernel.

Not all hubs are created equal. The one I bought today had horrible data transfer speed. It would barely work with Android Auto's H.264. I would suggest checking transfer speed on a PC before making any modifications for car use.
[Nexus 7 General] CZ Eddie:
Just a tip.... don't bother buying any nice new Polarized sunglasses for driving if you have a Nexus 7 car stereo.

When the Nexus 7 is in landscape mode, it's LCD panel does something that the Polarized lens can't handle. Screen looks super dark, and totally unuseable in my situation. Looks just fine when in portrait mode though.
[Nexus 7 General] TomCat_s:
hi guys,

well im struggling with my install a lot, so i decided to make as simple as possible. Main job for my nexus will be SAT NAV so i just need good battery life and fast charge. Recently I installed CHROMA rom and battery stands great and charge as well but performence droped quite bad :/ for eg when i launch TomTom Sat Nav and want to set a destination whole menu just doesnt run smooth :/ So I want to come back to stock 5.1.1 but I need fast charge, can You help me what kernel should I add??

Kind Regards

TomCat_s
[Nexus 7 General] fr4nk1yn:
yup, that's one of those things you realize instantly.

you have 3 choices only. M-Kernel A76, Franco R82, or Oxydo-Revamp. Oxydo is the only one with otg charging but that doesn't sound like an issue for you.

My system is running ridiculous. My awake time is typically 0% over 18 hours.

I've set a Tasker profile, I'll update an op later, that kills apps and then uses power event manager to sleep the tablet is power event manager fails to do it on its own. Only issue is it will be in airplane mode on wake when that happens.

My problem with falling out of fixed install mode hasn't happened in awhile, the random crash is the cause as I still get the crash and the setting still sticks.
[Nexus 7 General] KleBoR:
Hello, i hope im right in this topic..

I want to setup my nexus 7 (2012 3g) as a car pc but the old screen of the nav sys is a little bit to small (just 2-3mm) i was wondering if theres a way (yes its rooted) to move the status bar and the soft keys a bit lower/higher to fit the screen? Or make the screen a bit smaller ?

Thank you =)
[Nexus 7 General] fr4nk1yn:
Nothing I know of.
[Nexus 7 General] tulongest:
I'm about to start working on this project as well for my E46. I found my dusty tablet the other day and got it running on BSZAospLP v1.9 with data and cache on f2fs. I'm looking for a kernel/ROM that will support USB OTG/host mode so I can connect a DAC/Preamp, steering wheel module (Joycon), and possibly a webcam for a rear camera. As much as possible, I want to use my ROM as it's really fast, compared to stock before. Hmm, now that I'm thinking about it, I'm probably going to saturate the bus I/O too much, so considering bluetooth as well.

I'd like to be able to pair phones to my tablet too and have phones stream audio (stored on phone) and take phone calls (no, I don't mean Tablet Talk where you can answer the call on the tablet but you still need a headset connected to your phone). Viber and Hangouts Dialer (now with Outbound Caller ID) works out for now at least for the call function and I can just download the music to my tablet on Play Music for later.

I've been using AutoMate on my phone so far and looking to try this on my tablet as well. Haven't tried the Headunit app that was linked here yet but will try once I get my OTG cable.

Looking forward to integrate my N7 to my car.
[Nexus 7 General] fr4nk1yn:
Oxydo-Revamp is the only Lollipop kernel that will do OTG charge.

Headunit could take car of the dialer. But calls are still routed over bluetooth.

I may have to finally check out Automate. The latest Headunit is flaky and sound with the DAC is too good to go back to bluetooth. I'm really rethinking my whole software strategy. Headunit is also going to a subscription format which I abhor for software.
[Nexus 7 General] tulongest:
Automate was really convenient while I was driving from Toronto to Vancouver five months ago. It really gave me lots of handsfree options while making the long drive.

I gave the developer lots of feedback and bought premium for it. Highly recommend it.

It's too bad there's no way to fully pair phones to the tablet. That would make the N7 implemention complete.
[Nexus 7 General] tesna:
+1 for automate! A must have app for car install
[Nexus 7 General] fr4nk1yn:
I started play in with it yesterday. The main issue is no notifications from the phone or call access, wouldn't be an issue if using Automate on the phone.

I use my phone way too icy in the car. Android Auto was simplifying this.
[Nexus 7 General] tulongest:
The AutoMate developer will try to implement it if requested. He's been pretty good at listening to user requests.

EDIT: Some people have already requested this many times. I'm guessing the developer is trying to implement it as well. It will be great if the tablet can act as a A2DP sink, so we can properly pair our phones to the N7.

EDIT 2: Looks like for the tablet to be an A2DP sink, a ROM needs to be able to support it. I found a changeset that implements A2DP sink ability someone tried to commit into AOSP but was denied. Not sure who to direct this to but if I had knowledge of AOSP, I'd do it myself.
[Nexus 7 General] fr4nk1yn:
Install is giving me a fit right now. Repaced Headunit with Waze and Play Music on the tablet itself. Wakelocks are insane. NlpCollectorWakLock is back in full effect.

Using Tasker heavily to pause then stop music, which closes it, Shut down Waze with the close intent, and then kill everything else. Doesn't help one bit.

Also got the 5.1vdc/10amp dc to dc convertor in today and after hacking on usb plugs from a dead hub the tablet charges at only 70Mah.

Lots more setup to do.
[Nexus 7 General] SiK TL:
I'm not to sure what your set up is like. If you have time check out this thread.

http://xdaforums.com/showthread.php?t=3095884

Following these steps should help you with your wakelocks. I'm running a fixed car install Nexus 7 2012 5.1.1 Chroma w/ franco.kernel r82. I kid you not I can go almost 24hrs with 0% battery loss. Which is crucial for me since I drive my car 3-4 days a week for short periods of time.
[Nexus 7 General] fr4nk1yn:
It was a hit or miss. Some days it was 0%, somedauys it used 16%! The tablet stopped charging again after the last discharge. After being plugged in almost a day it charged 8%. It forced me to do a number of things I didn't want to. Basics is I bought a N7'13 and Timur's kernel.

I wanted to make the N7'12 work but it had to call it. IF Headunit was working reliably the N7'12 would be perfect for the task, but relying on one piece of software and one developer isn't terribly smart IMO.

The N7'13 runs lollipop without a hitch, waze and music works quick and smooth. The increasingly sophisticated Tasker script isn't needed either.

Timur's was necessary as ElementalX kernel had a problem with the DAC. The DAC wouldn't even power on unless the OTG cable was unplugged and reconnected. Oxydo-Revamp is really fantastic in what it does.
[Nexus 7 General] TomCat_s:
Hi guys, Im almost there with my install :) now im have problem with tasker and waking up tablet. Generally everything works till i start engine..... well when i turn on ignition tablet turns on screen turns on so OK :) BUT when turn the key to start the engine, it cut off the power to tablet for like 2-3 sec and that cause to activate power off profile on tasker, even so power came back and power on profile is on now. As a result tablet goes off after few seconds since i start the engine... :/ I put "wait" task into power off profile but didnt help.... :/ any ideas??
[Nexus 7 General] EclipseX:
the probleme with nexus 7 2013 is the location of USB and the headphones. The N7 2012 its easy to open and relocate the headphones and usb to the back of the device, and then its easy to hide all cables

I fix mine with magnetic iman and hide cables behind xD

check mine:
[Nexus 7 General] SiK TL:
I'm not using Tasker. Im using MacroDroid but I had a similar issue. I usually let my fuel pump run for 5 seconds which gives it power. Then i crank. Which cuts off power and then power on again for a slight second. I had a macro set to turn off airplane mode when power was detected,and and then turn screen off. Then I had another macro turn on airplane mode, a 3 second delay. Then turn screen off when power was disconnected. The issue ended up being that 3 second delay. I took that out and my issue went away. Maybe not the same but it could lead you in the right direction.
[Nexus 7 General] bbc0:
It seems to me that this forum needs to separate the N7 2012 from the N7 2013 versions. I would like to find the best setup for my original N7 running Kitkat 4.4.4 which it does well. When I go to lollipop my device just doesn't like it at all.
[Nexus 7 General] SiK TL:
I'm running 5.1.1 Chroma ROM w/ franco.kernel r82 on my 2012 Nexus its running flawlessly. Super smooth and excellent battery life. What are you comparing your current speeds too? It's a 3 year old tablet with out dated specs. It's only so much we can get out of it. IMO
[Nexus 7 General] bbc0:
I'm running Smoothrom V 5.3 (4.3.1) with leankernel which works very well on my N7.

I went back to this after trying DirtyUnicorns 5.1.1 and OrionLP 5.1.1 both of which drained the battery quickly and charged very slowly making the tablet practically unusable. As yet, I am unsure of the benefits of trying to make this old tablet work with Lollipop, although I do enjoy trying. I will give your setup a try and see how it works on mine. It's not so much the speed as overall useability and reliability with the s/w that I like to use. If it only works well with a certain browser, then it probably isn't for me.

I'll let you know what happens
[Nexus 7 General] fr4nk1yn:
Fortunatly I don't need to hide the cables, it's done for me by way of a relocation kit.

How did you move the plugs, and how is it mounted to the dash?

If you just want Kit Kat AutoDroid is probably the ROM to go with. Lollipop performs much better with all the necessary apps and services removed but adding back in Music and Maps will bring the wakelocks back unless you get aggressive with apps to control them. My debloat list in the 2nd post is a good start. If Onydo-Revamp had the firm sleep setting it would be perfect.
[Nexus 7 General] bbc0:
Hmm getting the 404 error for Chroma. Doesn't seem to be available at present.
[Nexus 7 General] fr4nk1yn:
http://xdaforums.com/showpost.php?p=63055629&postcount=867
[Nexus 7 General] KleBoR:
Does anyone could upload timurs kernel for the nexus 2012 tilapia? He stopped providing it and i cant find any download link -.-' it would be great if someone has just the kernel because i need a different rom! Greetings and thank you
[Nexus 7 General] fr4nk1yn:
https://www.dropbox.com/s/368chelim1sqwj9/cm-10.1-20130817-USBROM-tilapia.zip?dl=0
[Nexus 7 General] bbc0:
I downloaded from this link but when I installed the rom, using TWRP it failed to start so then I downloaded the kernel and tried installing both but this time it failed with error 70 I believe . Another question: does this ROM have Gapps installed or would I need to also install basic gapps when I do get it going?

I think that I am not wiping my N7 properly. I am never entirely sure what to wipe for a brand new (to me) ROM. On more than one occasion I have even wiped TWRP so I am nervous. Do I wipe system, data and internal storage? I previously just did a factory reset.

Any help on this would be appreciated.
[Nexus 7 General] KleBoR:
[MENTION=1118153]fr4nk1yn[/MENTION] is this just the kernel or the completed rom?

(Just wanted to be sure dont flash a new rom at the personal i use ;) )
[Nexus 7 General] fr4nk1yn:
I don't believe Timur released a kernel for the N7'12, usb USBrom.

And to answer an earlier question gapps are needed.
[Nexus 7 General] KleBoR:
[MENTION=1118153]fr4nk1yn[/MENTION] theres a kernel of timur + a usb rom. ;) and the 1st is the one i need ;)
[Nexus 7 General] KleBoR:
the link you posted is a complete rom right?

just want to be sure dont overflash anything.. ill try to extract just the kernel.. maybe ill get this to work.

would be awesome to have timurs kernel + autodroid rom ;)
[Nexus 7 General] fr4nk1yn:
AutoDroid ROM is 4.4.4. Timur's ROM is 4.2.2.

Besides that Timur has added stuff that goes beyond the kernel. Power Event Manager is intergrated into systemui along with drivers and modules. His stuff is also very specific. Have a back up if you try this.
[Nexus 7 General] fr4nk1yn:
Try this: http://xdaforums.com/android/apps-games/app-screen-shift-change-screen-t3138718

Also, I don't know I didn't think about this earlier but if your car, or headunit, can control an iPod, which mine can, PodMode: http://xdaforums.com/showthread.php?t=2220108