yashsingh1/xdaforums huggingface dataset:
[Nexus 7 Android Development] briangig:
Hmm, i did run into Autodroid not booting at one point. Are you using FSF2? Did you flash gapps? Which version of recovery? I was flashing between different versions of TWRP, I think I had to downgrade for Timur's ROM. I can check which TWRP I am on. You are doing a full wipe, right?

I didn't get a chance to install, I am in the Northeast US and got smacked with tons of snow. Wish I had a garage...forecast is for more snow, so it may be a while before it is installed. This is going into my 2006 Toyota Tacoma.

---------- Post added at 01:31 PM ---------- Previous post was at 01:20 PM ----------

Did you ever have any luck with getting it to work?
[Nexus 7 Android Development] Walz83:
I tried a different y cable and different charger. Can't think of what other hardware that I can try.

I was going to try different software, what kernels have you tried?
[Nexus 7 Android Development] crzycrkr:
It's definitely the kernel, not hardware. I've tried Oxydo also. Oxydo fast charges, but DAC often doesn't reconnect. Kangaroo always reconnects, but doesn't fast charge
[Nexus 7 Android Development] Walz83:
What did you use to check your charging rate?
[Nexus 7 Android Development] Walz83:
Can anyone here confirm if they managed to get fastcharge working ?
[Nexus 7 Android Development] papinist:
I always have fastcharge working. Nothing special, except for a DC-DC USB power adapter from minipc.de (same as mini-box.com)
[Nexus 7 Android Development] crzycrkr:
Unfortunately i can't seem to find anything to accurately measure.

With kangaroo kernel? And with y cable? Fast charge works fine if I remove the y with kangaroo, but not with the y
[Nexus 7 Android Development] papinist:
Yes, I have this rom flashed since 1.2 release (3G version) and it worked flawlessy. Y otg cable, DCDC-USB power adapter, Behringer usb audio, Poweramp and Torque with ELM327 OBD2 bluetooth adapter.
[Nexus 7 Android Development] crzycrkr:
Which version of kangaroo kernel are you running?
[Nexus 7 Android Development] papinist:
I had to check tomorrow when I'm in the car.

But it will be the one that's inside autodroid 1.2 :)
[Nexus 7 Android Development] Walz83:
I used one of these http://www.ebay.com.au/itm/271542195208?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Not sure how accurate but i think accurate enough.
[Nexus 7 Android Development] crzycrkr:
Yeah, I've seen those. Honestly I don't care enough. I don't have it in the car yet. Once I do I'll see if the charging can keep up. I'll try other options if it doesn't
[Nexus 7 Android Development] Walz83:
I have mine installed and charging can't keep up, I definitely need fast charging.

Battery drains ~10-15% through usage and ~2-3% overnight, so battery is lasting only few days.

What other options are there? I'm considering connecting power to constant 12V so can charge overnight, but will have to think of a different way to get N7 to enter deep sleep (in lieu of entering deep sleep on loss of power through power event manager)
[Nexus 7 Android Development] mcdull:
You need a 2A up charger AND shorter cable to keep the juice.
[Nexus 7 Android Development] xyron_2k:
I might have a solution for you

I removed my battery and used a 3.7 V power adapter hooked to the battery wires. Never had a problem since.

A big advantage is that you don`t have to worry about the battery getting swollen or even worse, setting your car on fire.
[Nexus 7 Android Development] crzycrkr:
Don't think that's it. Fast charge works fine with Oxydo kernel

---------- Post added at 10:32 AM ---------- Previous post was at 10:32 AM ----------

Walkthrough?
[Nexus 7 Android Development] MetalMan2:
While those are advantages, does your N7 stay powered all the time, or does it have to boot up every time you turn your car on?

The way I see it, you either have to wait for the tablet to boot up every time (my N7's boot time is >70 seconds), or you have a complicated setup that keeps the N7 powered all the time but still wakes it up when your car is turned on.
[Nexus 7 Android Development] Walz83:
Even when i use the 2A wall charger with a y cable for charging+otg I still can't get fastcharge to work.

---------- Post added at 09:24 AM ---------- Previous post was at 09:09 AM ----------

Does Oxydo Kernel work with AutoDroid Rom? Have you come across any issues with Oxydo other than the DAC issue?

I am not using a DAC as I'm using the 3.5 jack output into my stock amplifer.
[Nexus 7 Android Development] crzycrkr:
That's the only issue I had. In your case I think it will work better. I'm going to backup and try flashing oxydo over kangaroo and see what I get
[Nexus 7 Android Development] xyron_2k:
walktrough

For the start you should have some soldering skills.

-Buy one of these converters

connect the converter to 12V and adjust the knob to 3.7V. (use a digital meter)

- Buy one of these 5v Power adapters

connected on ignition. and into the tablet charging port.

- Open the case of the tablet and disconnect the tablet battery.

- Cut the red and black wires.

- Connect red wires to +3.7V wire

- Connect black wires to -3.7V wire

- Isolate the other 2 wires left( yellow and white) because you don`t need them anymore.

- Make sure all wires are isolated properly and after connect the power connector to the tablet and switch on.

Note: everyone can tweak his own install as he wants. This is just the basic. I`ve been lurking the forums for a while and this is the best and cheapest solution that I found. Of course you can plug a usb hub, dac or camera. The power adapters seem to be very reliable despite the fact they are made in China. I have this install for more that 6 months and i run google maps, music, weather cast, light at 100% and I have no problem. If you want some advice please PM.
[Nexus 7 Android Development] xyron_2k:
Sorry for delay. My tablet is on standby all the time. As I said in my previous post I have a 3.7 converter running all the time. I have ticked the wake up when charging option. I have downloaded the sleep button and if i want i send it in sleep mode or just remove the key from ignition and after 15 seconds goes in standby. You can Tweak it as I said earlier, with tasker or something else but I don`t think this is the case. I wanted to keep it simple. If you are using the power manager, which I`m not, the tablet should go in standby when removing the key from ignition.Thanks for your interest.
[Nexus 7 Android Development] Nsx93:
I dont know if i didnt install this correctly? I downloaded v1.2 to internal storage.

im rooted, on 5.0.2 lollipop. My device is 2012 nexus 7 (grouper). SuperSu is installed. Bootloader unlocked.. i usec wugfresh toolkit for all that.

im using twrp.

after wipe and install of autodroid 1.2, all i get is a black screen. Wont fully boot up.. tried it twice and same result. I dont know what i did wrong.

yes, i did wipe after install. Then reboot system.
[Nexus 7 Android Development] crzycrkr:
I needed to install the 4.4.4 Slimkat and then dirty flash autodroid over it. Something about the included kernel.
[Nexus 7 Android Development] poissonn:
^And were you able to get your tablet do otg + charging at the same time (fixed mode install)? I tried just about any combination of flash/root/unroot/kernel there is and none seem to make this fixed install mode work. It won't charge and do otg at the same time!

Although everything is working just fine when I go back to Timur's usb-rom...Anyone would be kind enough to upload a clean nandroid backup of a working fixed install Autodroid? I'd be curious to try it out!
[Nexus 7 Android Development] poissonn:
Btw, for those who got the fixed install mode working correctly, what's your kernel version in your settings?
[Nexus 7 Android Development] tikicult:
Does anyone have Viper4Android working on their setup with the UCA-202 DAC?
[Nexus 7 Android Development] Mestapholes:
Root problem

Hi,

after finally getting the rom up and running, I am now facing the problem that I am not able to enable root on the tablet.

Even so I switched root to "apps and adb" it still seems unrooted.

SuperSU not asking for permissions, rootchecker tells "no root"

Anybody with an idea what I could try to change this?

*Edit*

Well I played around a little bit. I flashed slimkat 4.4.4 and got root -> worked.

Than I did a factory wipe and flashed this version. Set to root and now root seems to be working.

Superuser asks permission for the power event manager when I change something. However, this change is not persistent.

Whenever I reopen that app, the settings are back to normal.

In addition changing orientation while this app is open leads to an error in the app. It closes and reopens right away.

Any hints will be appreciated!

Cheers

Christian
[Nexus 7 Android Development] Walz83:
You have to be in host mode for power event manager to work e.g. using an OTG y-splitter cable
[Nexus 7 Android Development] tikicult:
Check your kernel version too. When I flashed AutoDroid last week, mine was doing the same thing. Turns out that Kangaroo kernel didn't get flashed in the process. I manually updated the kernel and now its working fine.
[Nexus 7 Android Development] Mestapholes:
Thanks for you suggestions.

I build an according y cabel. The tablet is now in host mode, but not charging.

When I am within the settings page of the power event manager, on changing to fixed install mode leads to request of super user rights.

However when I hit back the settings are still lost.

The current kernel version seems to be 3.1.10-Slim-4.4.2-kk-beta 1.6+ autobuild@slimgerrit Dec 21 2014

Do I need to update the kernel manually and how should I do this?

Thanks!

Christian
[Nexus 7 Android Development] Mestapholes:
[MENTION=2766213]tikicult[/MENTION]

Ah, could not resist to try.

I just took the boot.img from the zip file in the first post and flashed it over the current boot.img.

Now everything works as expected, loading while otg :)

Now I still need to test if everything else is running smoothly before installing the tablet.

Thank you very much for your help!

Christian
[Nexus 7 Android Development] Walz83:
Fast charge

So I tried different ROMs and kernels to investigate whether i can fast charge to work (i.e. charge rate > 1A).

I tried:

AutoDroid Rom + included kernel

AutoDroid Rom + Oxydo kernel

USBROM + included kernel

All configurations gave roughly same results. I used the OEM wall charger and cable:

~650mA charging rate when using OTG y-splitter cable

~850mA charging rate plugged directly to wall charger

I am at loss as to why i can't get higher charging rates. I am thinking it has to be the y-splitter cable, is there a particular type of splitter cable that we should use?

Can anyone with fast charge working confirm their set up (hardware and software) and what charging rates they are getting?
[Nexus 7 Android Development] Mestapholes:
I am using the AutoDroid Rom with included kernel.

Going to verify tonight, but I am sure that I got fastcharging going (just need to double check).

I am using an y cable with an external lm2596 set to 5,4V for charging and had ~0.9Amp at 12,5 V -> about 2 Amps at 5V.

One thing I did notice so.

My USB Hub provides 5V to the OTG/PC side.

Shouldn´t, but does anyway, the +5V are traced with the other 5V of the other ports (opened the hub and had a look at the board).

When I attached my usb hub the loading current dropped to about 0.5Amps at 12,5 Volts.

Only after I disconnected the +5V wire from the tablet to the hub the charging rate goes up after about ~1 minute.

Maybe the hub negotiates with the tablet about the max current (but I don´t know why cutting the +5V wire would then help).

I `ll do my measurements again tonight and report back.

Cheers

Christian
[Nexus 7 Android Development] raksan:
Hi folks,

I used to have no charging when using 5v from charger or cigarette charger to OTG. Now, I just got a DC-DC Buck converter and it charges well. I dont know how to check the amp it provided but it's charge the device fast. I connect the short and thick cable from DC-DC to OTG, I tried with Oxydo and include autodroid kernel.
[Nexus 7 Android Development] Walz83:
If not installed in the car already, any chance you can also check what charging rate you get if you use the wall charger?
[Nexus 7 Android Development] Mestapholes:
It`s not installed yet. So I will try to do this.

As promised I did some measurements yesterday. I could not verify the behavior with the +5V wire attached to the hub (even so I am pretty sure it happend ;) ).

1.) Tablet only connected to the hub -> 0.56A @ 12.5V

2.)Tablet connected to LM2596 and hub -> 0.89A drawn from the LM2596 and 0.02 from the hub

3.)Tablet connected to LM2596 (hub +5V disconnected) -> 0.76 drawn from LM2596 and 0.13 from the hub.

I am going to use method 3. The tablet gets charged decently and the other components are powered on their own.

Guess that cutting the +5V wire is only necessary for me, since the hub provides the +5V to the PC/Tablet side.

---------- Post added at 11:00 AM ---------- Previous post was at 10:55 AM ----------

Another question I have:

Is it possible to attach a mouse and rebind it's keys or mouse wheel for controlling the tablet?

I know it is possible to rebind a keyboard.

I think it would be really cool if it would be possible to use the mouse wheel to control the volume.

The "normal" buttons to control the rest (e.g. home, back,...)

This way one could open the mouse and attach installed buttons to the original mouse buttons...

Ideas, thought...?
[Nexus 7 Android Development] menkromsen:
Hi,

I'm having big problems installing this ROM. I want to flash using f2fs filesystem but it simply wont boot nomatter how I flash. It plays the bootanimation forever...

Does the v.1.2 AutoDroid ROM support f2fs? Does this file also install the Kang-aroo kernel as default? - Does this support f2fs? (doesn't look like this when reading the kernel-thread)

When I formatted all my partitions with ext4 it went all good. Though, seems that that kernel is a default slimkat one... Can flash the kernel on top/separate and I guess that will work OK.

Any tips would be highly appreciated! Have been on Lollipop f2fs for some time now, ain't going back to ext4 :D
[Nexus 7 Android Development] Mestapholes:
When I tried to use f2fs it wouldn`t even make it to the boot animation.

I just switched back to ext4.

And had the kernel problem as well.

Guess something might be wrong with the last version...
[Nexus 7 Android Development] menkromsen:
Hmm, okay. "Good" to hear it's not just me :)

But, does the v1.1 work on f2fs partitions?

I guess it would work to convert the v.1.2 ROM to f2fs, but if the Kang-aroo kernel doesn't support f2fs were screwed...!
[Nexus 7 Android Development] Goon818:
http://xdaforums.com/showthread.php?p=58917156

Look in Nexus 7 3G.
[Nexus 7 Android Development] menkromsen:
Thanks for reply,

But - I can't find anything useful in that thread, other than to confirm that the Kang-aroo kernel doesn't support f2fs.

So, I guess if we want to utilize this ROM fully we have to use ext4....
[Nexus 7 Android Development] Mestapholes:
With the original wall charger I measured 0.85A @ 5V. So even if the charger is rated at 2A the nexus does not use them (at least with this kernel).

:D And the original cable looks crappy under the plastic cover :D

So maybe you need to get another power source to enable fast charging.

Cheers

Christian
[Nexus 7 Android Development] loveyoulovemetn:
Hello, my n7 2012 wifi was on Rastapop (5.0.2) last night, now I want to downgrade my n7 to AutoDroid 1.2, i formated all cache data system to f2s2, then copy AutoDroid N7 via mtp in TWRP, then flash autodroid in TWRP but i got stuck at Google logo, do I have to flash any baseband/kernel? Many thx
[Nexus 7 Android Development] Mestapholes:
As mentioned in the postings just before yours, there seems to be a problem with the f2fs and this image.

It looks like it is not possible to use f2fs.
[Nexus 7 Android Development] papinist:
I'm using f2fs with this image and it works flawlwssy. Someone askem me to check what kernel I'm using.. I always forgot to check when I'm in the car!
[Nexus 7 Android Development] Walz83:
I am a little (very) confused. Is your hub a powered hub?

Can you clarify the setups (maybe with some hand diagrams?):

1) Did you mean tablet only connected to LM2596? Unless hub is connected to the LM2596 and you use on of the hubs usb ports to run power to the tablet??

2) The LM2596 powers the tablet, but what is powering the hub? Do you also run power from the LM2596 to the hub, or is the hub drawing power through the y-splitter?

3) You disconnected the +5V of the cable between the hub and the y-splitter?
[Nexus 7 Android Development] Mestapholes:
Yes, the hub is an active hub. It can take voltages in the range of 12V thus making it nice to use in the car.

The hub has its own internal step down ic where it gets the 5V from.

This hub also provides 5V to the PC side (which I think it shouldn`t by usb specs), thus it could provide the tablet with power, but it only provides a current up to 1A @ 5V (and the internal power ic is only rated at a sum of 2A max for all usb ports).

This and because I like to be more flexible I like the idea of an external power source for the tablet (e.g. if I exchange the hub for another).

Yes I disconnected the +5V between the hub and the y splitter. I tried to make a drawing in the attachment.

Btw: I killed my LM2596 (don`t know how it happend, fooled around too much I guess...). I am going to order a little bigger dc converter with heatsinks. It`s oversized, but I didn`t find another in between these two, which is available in short time...

http://www.amazon.de/gp/product/B00GXXQ1VA/ref=ox_sc_act_title_2?ie=UTF8&psc=1&smid=AONS7HEF348I5
[Nexus 7 Android Development] Walz83:
Thanks for that mate.

I have a similar setup except that my DC converter output is fixed to 5V. Maybe having 5.5V going into the tablet helps with fastcharge? This can be confirmed by checking charging rate when using the wall charger which is fixed to 5V.

The only other hardware variable is the splitter cable. Do you have a link to the one you got?

FYI it seems this buck converter is popular on this forum http://www.amazon.com/gp/product/B00BYTEHQO/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1
[Nexus 7 Android Development] MasterOran:
hey guys,

i planning to put a n7 AS a car pc. but i still got some questions and hope someone can help me.

Did anyone got a parking camera installed? if so how and how does she behave?

what's about a phone function?

I really want to have a way to get phone calls via the tablet, is there anyway to make the tablet use my phone to call someone? or a adapter for 3g usage?

thanks
[Nexus 7 Android Development] Walz83:
Just saw your previous post where you mention you only got 0.85A from wall charger. Did you do it with the splitter cable connected to the tablet?
[Nexus 7 Android Development] Mestapholes:
No, during this test I used the original charger cable.

I build my own y cable using this: http://www.amazon.de/gp/product/B00NAZY1OI?psc=1&redirect=true&ref_=oh_aui_detailpage_o02_s00

You could either provide the power via the micro usb, but the cable to that side would conflict with the space available while installing.

So I opened it and soldered extra cable to this (fairly easy).

The buck you mentioned is very similar to the one I used before (didn`t have the fancy display so :) ). It got pretty warm when it charged at 2A. If using this a heatsink should be added, 2A is defined as max without heatsink.

It is not possible directly through the tablet (even with the one with 3G). I bought this http://www.n2mobile.org/ and on first test it seems to do what it`s supposed to do.

The software only had portrait mode, but I changed that to landscape. But haven`t tested really in detail.

Cheers Christian
[Nexus 7 Android Development] papinist:
Finally I remember to check the kernel for you guys: I have 3.1.10 kangaroo kernel and it works fast/power charge, OTG, powereventmanager, and so on.

[MENTION=4073081]MasterOran[/MENTION]: you can use TabletTalk, it's a great app!
[Nexus 7 Android Development] Walz83:
What are you using to power the tablet?
[Nexus 7 Android Development] unknownprotocols:
Anyone else been running this awhile? I've had it on my in dash n7 for several months, and every once in a while I have to factory reset to get dac audio back. Extremely frustrating if on a road trip and don't have time or WiFi to redownload my spotify library. No one is going to update this? Considering the 2013 n7 and paying for timur kernel if no one can take over this project. I'd be willing to build this, but I need help with learning how to use github to pull in slim and merge this devs kernel and changes. I am a programming student, if someone could give me a walk through / be available to answer some questions while I get started? If not, 2013 n7 it is.
[Nexus 7 Android Development] MasterOran:
Well but can i use it with google voice control ?
[Nexus 7 Android Development] papinist:
I'm using a DCDC-USB power adapter, you can find it at mini-itx.com or minipc.de if you are in EU.

I'm using it since v1.1 and it works great. I'll love an updated version but actually it works quite well, so I'm not worried.

Voice control works but only with integrated mic. I've searched all the net for the ability to use an external usb microphone but KitKat hasn't the required API. This would be a good reason to update Autodroid to Lollipo :)

If you mean using voice control to make call, no, you can't because N7 has not the ability to make calls itself, so the system won't recognize that command. But I'm sure using Tasker or similar you could redirect this command to Tablet Talk.
[Nexus 7 Android Development] MasterOran:
Well that what i want to do, get a external mic and use a APP linke tablet talk.

like

"OK Google call Jon doe"

"ring ring"

"whaaaaasssssss uuuuuuuppppp"

while Jon see my smartphone number when I call.

edit:

BTW is it possible to force tablet talk to throw the contacts away on every DC ? or have to have seperated personal contact book or something like this?

so different ppl can use the car with out sync there contacs
[Nexus 7 Android Development] papinist:
I don't know if TT can be configured to connect to different smartphones.. try to contact the developer.
[Nexus 7 Android Development] J.Edwards(not the killer):
hello guys,

just want to give you an update about my experience with autodroid and the nexus installed in my car for about 1 year now:

i got the following things to work reliably:

- RTL2832 radio

- 2A charging via pogo pins

- usb to can converter (i can detect reverse gear and my steering wheel controls ... i love it)

- stk1150 rear cam

- no wakelocks

- no cracking! (see below)

- USB DAC

- GPS with car antenna (i get gps fix in less than a second)

- Automatic Power Up/Down

i discovered that cracking music that appears on high load or every ~30 min is based on the mobile network driver. Disable mobile network and issues are gone.

for me its like an OEM head unit now. Everything works flawlessly :D

just dont know what else feature i could add....
[Nexus 7 Android Development] papinist:
great!

Can you share details on what you used for usb to can converter, rear cam and radio?
[Nexus 7 Android Development] MasterOran:
Nice, iam very exited how you did this.

Espacially about the can and camera.

And did u tryed to make a phone call with your head unit?

Did u ever tryed Voice Control?
[Nexus 7 Android Development] crzycrkr:
I would actually like some info on the specifics of what you did with the pogo pins
[Nexus 7 Android Development] Goon818:
He make the same, what i have made.

Read the article 928 in this thread.
[Nexus 7 Android Development] crzycrkr:
Thanks. That may be a little much for me. I'm wondering if I could take my dock apart and epoxy the contacts to the pogo pins