So i have wanted to do this for a long time on other vehicles but i didn't plan on keeping them so i put it off. I plan on keeping this truck till it falls apart so decided it was time to try it. I really wanted a NAV unit and i wanted to run torque all the time. This allows both and more. This is my first time doing a build Thread so i will probably leave some stuff out but i haven't seen any other Nexus installs so figured i would make one.
I also purchaced a 12V relay, some extra wire and a fuse holder.
I had a USB to headset dac already handy so i did not buy one but probably will upgrade to a better one later.
I am still working on a fix for steering wheel controls and backup cam. i believe i have found a fix for those but as i don't have it working yet i will update later when it is.
First i cut/dremeled out a slot on both sides of the double din face plate
i then ensured the tablet would fit properly and be held securely by the frame.
I then ran the all the wiring. here is a diagram of what i installed. Forgive my skills in paint. its what i had :dunno:
And here is the final product.
The tablet, when configured with Timur's Kernel, powers up when it receives power and goes into a deep sleep when power is lost. The kernel allows USB host mode and charging at the same time. Host mode allows you to run usb accessories like HDDs, webcams, ect. I plan on rerunning the usb that is in the dash to the hub so i can easily load new music or pics via usb drive. Let me know if you have any questions and i will answer to the best of my ability.
I'm very interested in this project, and have little knowledge on how to accomplish it, so some of my questions may be dumb, but...
Why did you go with the 32 GB Nexus instead of the 16? Couldn't an external HD be connected through the USB port if needed? Why didn't you go with the LTE unit?
Mostly comes down to personal choice. I personally always want extra storage. USB drives should be good. The only thing you have to watch for as in my setup the hub loses power when I shut off the truck so the nexus may have to refind all the music. The kernal I'm running should fix that but I haven't messed with it yet.
I didn't go with LTE for cost reasons. The LTE version cost about 150 more in most cases. Also to use LTE you have to pay an additional access charge every month. I desided that I would just teather it from my phone instead. It gives it the same capability and if my phone doesn't have service neither would the tablet.
I'm getting my order ready, and I'm looking at the90 degree OTG cable and the USB host OTG cable + Charging. I can't figure out how the charging cable plugs into the 90 degree cable. What am I'm missing?
i will warn you that i had to sand down some of the plastic on the inside of the my dash plastic and still had a hard time to get a 90 degree to work. i had a problem today and am actualy taking off the plastic on the connection that plugs into the tablet so it will fit better
Okay, I've got my tablet and have been familiarizing myself with it. I understand that the process of installing Timur's Kernel will void the warranty, so I want to exercise it for a bit while its "stock." While I was initializing it, it listed a bunch of updates, so now, among a lot of other things, I've got 5.0.2, which I now see that Timur says there is a beta for. I hope that isn't going to make things difficult...
BTW, SuchTrk, are you going to incorporate FM or satellite receivers into your installation for when you're out of wireless range?
It will void the warranty if its related to software. If you get something like a broke button or dead pixels you will still be fine. the problem with operating it while its stock you can't haven't it automatically go to sleep and wake up on power states. This is fine if you do a setup that you can remove the tablet but if you do a more permanent install it will be a pain. You could try to add and external button for power but i didn't want to open up the tablet to try it.
I went ahead and upgraded to the 5.02 as i wanted to play with the new android version. with that i am running his V3 Beta for it. So far it is working well
I plan on getting a software defined usb radio for it as soon as i get my steering wheel controls working. my module for that should be here Friday. But i plan on just storing music on it or on a thumb drive for when i am out of range for music.
as far as rooting and installing his packages, if you get read up on the process and are carefull you won't have a problem. As long as you get a recovering installed and working before you mess with the operating system you can always find the factory version online. Because the nexus was meant to be more open they host all of the factory images online for easy access so you can always revert back if you have a problems.
I only figured to wait a week or so for the software. I've watched one YouTube video on rooting; I'm going to read up on it a bit more before I dive in...
Looks good but I wanted to do other things with the BT. Keeping the factory radio and just installing the tablet on top is easyer but streaming music on BT takes a lot of bandwidth. So I desided to pull the factory stereo completely. This way I can use the BT for torque and a radar detector and not worry about music skipping.
The N7 is rooted and Temur's Kernel is installed; everything seems to be running fine.
A couple of confusing things:
1. The replacement 90* micro USB cable isn't listed as an OTG cable, but it seems to be doing the job.
2. The description on Amazon for the "Y" cable specifically states that it won't charge the tablet, but it is. ???
I connected the OTG "Y" cable in line with the standard N7 charger while watching the Power Event Manager. I enabled F1 mode, fast charging, and firm sleep. Show suspend screen... And show wake up toast were enabled by default.
External power and charging battery indicated correctly when the power cable was plugged into the female micro USB. The tablet shut down and came back to life when power was disconnected and reconnected.
Where did you find the 12V switched that stays hot while the key is in the "start" position? It doesn't appear that the 12V switched to the stock radio does.
The N7 is rooted and Temur's Kernel is installed; everything seems to be running fine.
A couple of confusing things:
1. The replacement 90* micro USB cable isn't listed as an OTG cable, but it seems to be doing the job.
2. The description on Amazon for the "Y" cable specifically states that it won't charge the tablet, but it is. ???
I connected the OTG "Y" cable in line with the standard N7 charger while watching the Power Event Manager. I enabled F1 mode, fast charging, and firm sleep. Show suspend screen... And show wake up toast were enabled by default.
External power and charging battery indicated correctly when the power cable was plugged into the female micro USB. The tablet shut down and came back to life when power was disconnected and reconnected.
Where did you find the 12V switched that stays hot while the key is in the "start" position? It doesn't appear that the 12V switched to the stock radio does.
I am currently using the one in the harness but sadly it does not stay on while cranking. I am currently on travel for work right now so I haven't been able to mess with it in a week or so. I apologize for the slow response
For charging with the Y cable it has to do mostly with software and the hardware in the tablet. If you were to uninstall Timur's kernel you wouldn't be able to charge at the same time. Due to how the stock software is designed. On stock otg I'd you plug in say a USB drive it will pull power from the tablet. Since the tablet is outputting power it can't charge. The kernal changes how that works. With their kenal installed and ( if I remember correctly) have fi mode enabled in PEM then if you just plug in the USB thumb drive it won't work till you plug in a power source. That is because the kernal stopes the tablet from putting out power so it can charge instead.
I've been experimenting while I'm on the road in my work truck. The audio from the 3.5mm jack sounds really good, but there's an issue when the unit's charging. It has a continuous tone with the audio. Looks like some kind of ground loop issue, but it's not alternator whine - it doesn't change with engine rpm.
Another funny thing is that the FI won't work with the 90* cable in the circuit UNLESS THERE IS SOMETHING PLUGGED INTO THE USB (non-charging) port. :dunno: And, yes, the USB device won't operate unless the external power is plugged in.
Well, stay out of trouble on your road trip. :rofl: you'll probably have thought of plenty of new ideas by the time you get home.
Hmm intresting that the 90 degree causes that. I have some usb terminations coming in (hhopefully) soon. I'm going to wire up my own "Y" cable. I think the wires are too small in mine to allow it to charge fast enough. I will be home next week to mess with it more.
The description in Amazon of the 90* cable doesn't say anything about it being an OTG cable, and if it's built like the normal cable in this diagram, the otg doesn't look like it would connect through it since there' soothing connected to pin 4 on the micro - but, then, I don't know how to account for it working with a device plugged into the USB plug. :dunno:
The sense pin is used for a normal device to decide what mode to operate in. there are some DIYs out there that show putting a resistor between sense and ground enables the otg + charging For some devices. I don't think my cable is using the sense pin that I know of but that could be why yours won't charge. It may not "sense" any thing attached and therefor not charge.
So i attempted to build my own cable... utter failure. i have watched and looked at several how tos and still can't get it to work. the pin 4 on the micro usb is indeed used on OTG. with out it the nexus won't move to host mode. i have been able to get the device to recognize that i am plugging in an otg cable but it won't connect to anything. i have been testing with a usb thumb-drive that has a led in it that blinks when it is being read. when i try to use my custom cable it just blinks extremely fast (faster then normal use) and the nexus doesn't' recognize it. I will see if i can do some more testing this weekend with it but i have no idea why it isn't working.
Maybe you've got a bad connection on one of the data wires. If you put a cable in between the OTG cable and the N7 I don't think it will detect the OTG, so it should operate normally.
Mine won't go into the FI mode unless a usb device is plugged into the data plug on the OTG cable, but it works fine as long as something is, so I guess I'm not going to be concerned about it.
Until I get the bugs worked out, I'm going to use my N7 with the audio plugged into the Line In of the stock radio. That way my wife won't go nuts when she uses the truck. :nod: other than not being able to mount the N7 in the dash, it works pretty much the same; line in is even the default on the factory unit, so it can be pretty much invisible.
the problem with testing that is i don't have a micro to micro cable. i also am having terrible luck trying to figure out the steering wheel controls. its like i'v hit a brick wall lol. the cable i have is working ok i'm just afraid its not going to hold up very long but the steering wheel control is bugging me to death
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