Database Develop

[GUIDE] HowTo Make a Mazda RX8 Streak

This guide represents a current WORK IN PROGRESS. Development is currently underway for Streak 7 OTG functionality including consideration for FTDI Serial2USB kernel module and HU Integration via custom Android Activity & Service, and breakdown of the Home Dock for stealth installation and OTG support.
While this guide focuses on Streak integration with a Mazda RX8, the concepts, tools, and many of the components can be utilized for a multitude of other platforms.
MODS: If you'd rather this be in General or Apps & Themes, feel free to move it. Simply bear in mind that I plan to provide source and binaries for a custom FTDI kernel module (if necessary), steps for installation, as well as source and binaries for any Android Activities and Services I build for Integration.
I've been running a Windows 7 mini-itx carpc for quite some time on my RX8. The system consists of a ITX case I keep mounted in my trunk, USB GPS, RS232 to OBDII wired connection, a Grom Car2PC HU Integration adapter with a bunch of custom code for HU and Steering Wheel controls integration, and a Lilliput 7" Resistive touchscreen mounted in a Mazda Japan Retractable Navigation tray.
I deliver clean power to the PC using a Carnetix P2140 power supply with a bit more custom code for ignition synchronized hibernate and wakeup.
For the past year I've been waiting for a good Android tablet replacement and have landed on the Streak 7.
Dimensions wise the Streak 7 matches the typical Lilliput 7" exactly.
This project requires the following additional hardware for your RX8
JDM Retractable Nav Tray
SlipGrip RAM-HOL Mount
Streak 7 Dell OtterBox (Commuter)
Streak Home Dock *
3.5mm Audio cable (possibly with MIC splitter)
Grom Car2PC Adapter
Here is a picture of the Streak running OBD2 and HU Audio integration via the Streak audio out jack and a bluetooth connection to a generic ELM OBD2 reader.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
What works?
Car Mount complete
Head Unit Audio via Streak 3.5mm audio out
What is in-progress?
Dell Dock breakdown
PDMI extension cable (if required)
Power supply integration
Power state change Android Activity
What is planned?
USB OTG Support via dock
FTDI USB to Serial Kernel Module
Car2PC Integration Android Service
----------------------------------------------------------------
Post #2 illustrates adapting the Mazda Nav Tray and SlipGrip mount and dash installation.
Post #3 illustrates placement of the Grom Car2PC adapter and all HU integration items.
Post #4 illustrates breakdown and placement of the PDMI dock, power wiring, and OTG wiring
Post #5 reserved for future use

Post #2 illustrates adapting the Mazda Nav Tray and SlipGrip mount and dash installation.
You need to mark and drill two holes on the JDM nav tray's center plate for mounting the SlipGrip Streak holder. I also used a wood shim to provide a solid mounting surface between the center plate and the holder.
Here's a shot of the Navigation Tray fully assembled, ready to be installed in my dash.
Remove all Center Console components.
Wiring and Mounting complete (temporarily using the Streak 3.5mm audio plug for HU integration to my Car2PC module).
And all stealth like when not in use.

Post #3 illustrates placement of the Grom Car2PC adapter and all HU integration items.

Post #4 illustrates breakdown and placement of the PDMI dock, power wiring, and OTG wiring

Post #5 reserved for future use

If you're planning on taking apart a multimedia dock, I'd be interested in high/higher res scans of the pcb and the wiring diagram of it for the wiki.
Some of it's pins are known, but the info is all over the place

I've got a DLSR so no problem. I'll be out of town for the next couple days. Should have an update by next Friday.

Nice work so far; looks very clean and professional. Are you running Torque app in there?

I have torque lite installed... Have been using dash command too.
Sent from my GT-I9100 using Tapatalk

TheManii said:
If you're planning on taking apart a multimedia dock, I'd be interested in high/higher res scans of the pcb and the wiring diagram of it for the wiki.
Some of it's pins are known, but the info is all over the place
Click to expand...
Click to collapse
Sorry for the delay... finally got to dismantle my dock and take some pictures.
Hope to have it integrated this weekend.

Very cool. This is almost exactly what I wanted to do except I was thinking docking the tablet directly into the dash but that works very well too
I am interested in the pin out as well. I am going to be swapping the stock PDMI connector for a micro USB soon. My PDMI connector bent a pin inside and is now shot...

I had originally wanted to use the dock too but have been unable to source a PDMI extension cable. Even unboxed I dont have the real estate to mount to it directly.
Sent from my GT-I9100 using Tapatalk 2

I will be mounting the dock into the center console of my dash. The dock will be mostly hidden with just the front end and pdmi pins sticking out enough to set the SD7 directly onto the dock and sit flush against the rest of the dash. My local audio shop is comming up with some interesting ideas on how to secure the dock and then have some way to keep the tab secured.
The dock will then connect to an after market head unit through the 3.5 output in the back of the dock and connect as an six input in the back of the headunit. Dock will be hard wired to the battery so that all wiring will be hidden in the dash.
Then I will chose option to "keep screen on while charging" so that when I power on the car and power is fed to the dock the screen will automatically power on. The head unit also has a usb for a flash drive worth of music when the streak isn't being used, as well as ipod input and built in control and ill have the ipod wire run to the glove box.
Essentially, tethered to my cell, the streak 7 will act as a secondary removable HU, internet ready for things like navigation, add free Pandora with unlimited skipps, I've got grooveIP working flawlessly to make and receive phone calls through my Google Voice, I plan on adding a Bluetooth obd2n unit to display car info in real time through something like torque, I'm waiting for the GoPro WiFi bacpack to be released this summer and ill have a front or back end cam displayed through the stated GoPro control app comming to Android when the WiFi backpack is released. I've even got two headrest monitors that will eventually be fed by the hdmi output from the dock.
I am excited, been a long work in progress(with no work taking place lol) and the set up gives me tons of input options and allows me to pick up my ds7 and go just like any removable face HU, except I get to play with mine when its detatched.
Any other ideas for apps or what not, I am all ears. Something that isn't working on my streak right now is voice control... That will be needed while I am driving! Check the beta4 thread
Sent from my PC36100 using XDA

Does the Dell dock have any sort of remote control? It would be awesome to set up your steering wheel controls to function with the DS7. Another possible option would be to use a bluetooth keyboard wired up to your steering wheel controls and then a programmable input in the Android system such as a game controller app allows programing of simulated keys.

my vehicle is a '06 Mercury Mariner... basically a nicer version of a Ford Escape.
there aren't any steering controls, i'm not to concerned with that as of right now, but i do like the idea of a Bluetooth keyboard. I was looking at some mini keyboard options from amazon/ebay/dhgate. one with a built in track pad or some kind of mouse pointer control perhaps?, I could just pass the keyboard around the car and let my passengers have some fun(browser and app input? search for an app or music selection?). but I do like that idea of perhaps assigning key presses to do things like volume control or to jump to a particular app like maps?
the dell dock has no remote control options. I am curious how many different Bluetooth pairings I can have before causing issues: headset first for use with GrooveIP for incoming/outbound phone calls-next would be keyboard-then OBD adapter.
I plan on strictly using ICS on the streak. I'll need to make sure I will not have any compatibility issues with anything I do. I've also never attempted to pair a keyboard with an android device... but I guess Ill buy one and ask questions after and return it if it doesn't work.

I personally have not used a keyboard either but I know people use them and a mouse all the time on Android devices. I like the ideas you have. One question, what is an OBD adapter? I might know but am just not getting the acronym.

Plugs into the cars CPU and transmits information. Look up "torque" in the market. Basically sends data to an app that will display real time on an android device..... think guages
Sent from my PC36100 using XDA

I have full HU integration with the Grom BT adapter and have developed my own communications library (and front end) for interfacing with my car's ECU.
Sent from my Galaxy Nexus using Tapatalk 2

Awesome. I follow now. My aftermarket ECU for my Mitsubishi allows for a laptop to do the same thing plus obviously change the program. That is really cool that you can monitor you vitals using an Android tablet now.

I'll have to set aside some time to update this thread at some point. There's a lot of stuff I've implemented that I haven't captured here yet.

REVIEW AppRadio 2 by Pioneer

Today we’re looking at the AppRadio2 from Pioneer.
Original review with all appropriate links can be found by clicking here.
The AppRadio line is a huge step into the future for in-car audio. Pioneer was first out of the gate with a relatively affordable, practical, and highly functioning 7 inch capacitive touch screen car audio head unit. It's most unique feature and the reason you'll want to read through this review is because the AppRadio 2 can connect to and translate your smartphone's app capabilities into a one of a kind super device on your car's dashboard. You'll be able to use AppRadio optimized versions of some of your favorite apps to listen to music, navigate, find parking, communicate with friends and even check your car's diagnostics with the right accessories attached all on a crisp 7” touchscreen display.
Click here to see a video slideshow of the AppRadio2 in action.
Main advantage: Android and iProduct compatible (some smartphones require adapters iPhone5 and Android), crisp 7” WVGA touchscreen display with multitouch, built in amp (MOSFET 50 W x 4) 2 RCA preouts, subwoofer control, great modern hardware design with high quality materials used, can use your car's existing steering wheel controls, bluetooth audio for phone calls (mic included)
Main concern: no CD/DVD slot, no AUX in, no adjusting display angle, bit of a learning curve, no bluetooth audio for pandora or stored music.
Unique features: built in external GPS means you can turn off your phone's GPS to save battery while connected to AppRadio (turn on “enable mock locations” in your phone's settings)
While it will work with a number or phones, this device was tested exclusively with a Samsung Galaxy Note 2
Someone always has to be brave enough to be the first. Even if a product isn't completely ready for primetime, it's important to release something so that people can become familiar with a new concept. Apple really made their name by being the first extremely simple, yet powerful mp3 player and then smartphone. The early iPhone lacked a lot to be sure, but it did enough well that it changed mobile communication forever. Pioneer has shown that it has the guts that Apple had to start. They took a risk with the AppRadio and it's a great start that has great potential looking forward. Other car audio companies are clearly waiting and looking over Pioneer's shoulder concerning the AppRadio. They waited for Pioneer to make a success of the AppRadio concept and now we are starting to see some copycats emerge built off of ideas learned watching AppRadio. It might work for some of them too, but it's just not a very dignified way to do business and before I even start my real evaluation of the AppRadio 2, I give Pioneer my respect for being brave enough to release such an innovative step forward into uncharted waters.
The AppRadio 2 on it's own is a gorgeous head unit. It's so clean and simple and it's design foreshadows it's function. It floats on your dash as a huge crystal clear glass screen with an almost invisible bezel and a stainless steel “chin” at the bottom that holds the few physical buttons. Volume up/down, a home button, and a menu and back button specifically for Android phones. Pioneer didn't cut corners with materials used, this thing looks and feels like you'd want a piece of the future to look and feel. The AppRadio 2 is first and foremost a blank canvas. It's waiting to be painted with the graphics, sounds, and functionality of your smartphone whether it's an Android or Apple device. While it would be a near perfect product if Pioneer could trust us to control ourselves, we don't do that well unsupervised as drivers. If the AppRadio was a true 1 to 1 mirrored display of our smartphones, we could watch netflix movies and send text messages while driving 90 mph on the freeway. Now you and I might be sensible enough to not abuse the privilege, but plenty of 16 year olds that want to impress their friends in their first cars might not have that same restraint (and they might be driving on the same freeway as you) so try to understand the motivation behind a controlled experience. It's definitely a bit disappointing, but Pioneer offers a very filtered experience of your phone with the AppRadio 2 for now. While some apps can be just about everything they are on your phone, others won't work at all or will display images but not be able to be touch controlled.
Everything begins with a detailed warning to not operate the head unit while driving, fair enough. Commonly called a “nanny” or “nag” screen, a quick click of a button brings you into the AppRadio's main start screen. You'll be greeted by a large modern clock and day of the week indicator to start. Behind that is a wallpaper that can be changed through your smartphone app's menu setting. Below the clock, you'll find 5 icons (radio, iPod, apps, Pandora, and Phone) and with nothing connected to the device, 3 of them (iPod, apps, Pandora) will be grayed out by default. By itself, the AppRadio is simply an FM/AM radio and a speakerphone for hands-free bluetooth calling and that's about it. Connect an iPod and you can play your music, connect a phone through the appropriate cable and you can listen to Pandora or go into AppRadio mode where the real fun starts. A swipe to the right will bring up a second page of options, an expanded settings screen which actually offers a bit to look at. Next an “OFF” button that puts the device in a standby mode that amounts to a screensaver, full screen background and small clock. The last button is a display off button that will let the screen go black if you find a time you need the darkness.
Again, AppRadio2 will work with many different makes and models of smartphone, but it was clearly designed with the iPhone 4/4S in mind. You'll find a very intuitive and polished experience with that phone. Connect the included cable and go. While it can technically be made to work using the iPhone 5 and Android phones, you won't find anywhere near the same out of the box functionality. Whichever phone you use, you'll need to go to your appropriate app store first, Google or Apple, and download at least two apps to get started. The main AppRadio app that is the basis for your phone's connection, and the CarKeyboard app that will also need to be enabled for touchscreen keyboard use while using the AppRadio. The unit looks for these apps and will not function fully without them. Aside from helping your phone communicate with your AppRadio 2, the AppRadio app scans you're already installed programs and tells you which will work with appradio. The apps are the easiest part of getting started with the AppRadio 2 on Android. The part that gets a bit tricky is finding the correct adapter.
If you own one of the Galaxy line of smartphones then you know that Samsung has elected for a single micro USB input on most of their phones. The same port charges and syncs but what if you'd like to output HD video from your powerful phone? MHL, or Mobile High-Definition Link is the answer. MHL allows you to connect a micro USB cord to your phone which is attached to an adapter that turns the signal into an HDMI output that supports up to 1080p HD video and 7.1 surround audio while also charging your device. As simple as they are to use, MHL adapters aren't simple to choose. First and foremost you need to know if you need a 5pin or an 11pin adapter. The Galaxy S3, S4 and Note 2 need 11pin and older galaxy phones need a 5 pin. After that you need to know how much power your phone draws while charging. The MHL adapter needs to be connected to a power source to be able to charge your phone while it converts the video signal. The Galaxy Note 2 draws a very thirsty 2.1 amps of power which is the same as the iPad and most other tablets. The included iPod cable can be disconnected and reveals a full sized female USB port. That USB port outputs 1A charging that is enough for most smartphones including the iPhone. While it will work with some phones, unfortunately it's not enough to keep up with the Note 2. If you were to use a normal 1A car charger (or the AppRadio's included USB charging cable) with this setup everything would still work, but you wouldn't be able to charge your phone. In fact, it would drain battery because of all the work that it's doing. For the Galaxy Note 2 you'll need the following:
-an 11pin MHL adapter
-a microUSB charging cable
-a 2.1A car adapter
-an HDMI cable
These items are easy enough to get, but you need to know what specific pieces you'll need for the best outcome. For the MHL adapter, an abundance of counterfeits have flooded some of the big ecommerce sites, this automatically rules out Amazon and eBay unfortunately. Some copies are identical on the outside and plain garbage on the inside. They will make your setup charge inconsistently or not at all and make your picture signal choppy when connected to the AppRadio 2. Smartphone forums are littered with frustrated people that tried to save a buck on a cheap adapter, you'll see them blaming the head unit but trust me here, there is only one real way to do this. I like a deal as much as anyone, but unfortunately this is a case where you'll need to go to the manufacturer and pay retail. Luckily Samsung is always offering large discounts on it's own accessories up to even 50% off in some promotions. A quick Google search will show you the current deals available. Now that you've collected all of the pieces, you'll need to connect them and get started.
click here to read PART TWO which includes pricing, links to purchase, and optional accessories

It won't run Google navigation? This seems like a $500 extra screen, much like a smart watch or that contraption the adds an lcd to the back of your phone. Why not just use your phone?
Sent from my SAMSUNG-SGH-I317 using Tapatalk 4 Beta

LittleRedDot said:
It won't run Google navigation? This seems like a $500 extra screen, much like a smart watch or that contraption the adds an lcd to the back of your phone. Why not just use your phone?
Sent from my SAMSUNG-SGH-I317 using Tapatalk 4 Beta
Click to expand...
Click to collapse
An app called AR liberator made by a brilliant dev who is currently recovering from illness (get well Kyle) makes this one of the most useful pieces of tech I've ever played with.
I don't know if you took the time to read through the whole review or not but at the end there is an "EXTRA TIP" section that hints towards this.

snapz54 said:
An app called AR liberator made by a brilliant dev who is currently recovering from illness (get well Kyle) makes this one of the most useful pieces of tech I've ever played with.
I don't know if you took the time to read through the whole review or not but at the end there is an "EXTRA TIP" section that hints towards this.
Click to expand...
Click to collapse
The appradio + ar liberator is the best tech you can put in your car my friends has it so awesome.
Sent from my SCH-I605 using xda premium

Nexus 7 on a VW Transporter

Hi everyone,
This post is about a love story between a nexus 7 and a VW Transporter.
It all starts by needing a gps in car for deliveries or just to navigate over alternative roads.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Personally I dont ever liked the original VW dashboard, it's really boring, doesnt have nothing, not even a 'cool' radio.
So, 2 years ago we put one new radio that supports usb playing (WOW! Even when I got home, I stay in the car just to hear music), new wiring sound cables and some new Pioneer columns.
The paintjob its pretty damaged by now, so we start recovering it this year, all motor parts being veryfied.
TO DO LIST
Painting it with EWP WHITE BRANQUISE _link, black roof.
2.4 diesel engine and fuel pump revised, all oils changed, timing belt changed,
new tires, new rims, new brake pads and discs, new full exhaust system
Lights: daylights led using old headlights, xenon kit, led stop lights (3rd stop led bar too),
all domelights changed to LED, license plate light changed to led, odometer led
Extra: New dash (home-made) with Nexus 7, start button, parking sensors,
all interior has been cleaned and renewed.
TIMELINE
11/2012
Buying n7
Window mount for gps nav
Root and install SmoothROM
30/1/2013
Bootanimation w/ VW logo
2/2013
Idea to make a new dash myself that includes a built-in tablet.
Not anymore that ugly and sad dash.
Doing it in spare time
3/2013 > 5/2013
Starting hardwork with motor and new belts.
Some paintjob under the hood.
All front painted.
6/2013
Original dashboard remove. Keeping my headunit.
Trying solutions to fit new one, and easiest way to take n7 with me when needed.
7/2013
Ordered some parts, chargers, hub, etc.
8/2013
"Ain't nobody got time for dat!" :/
9/2013
Painting
Discovered USB-ROM and installed it, pretty amazing, extreme battery save
USB host pretty much like a computer. Doesnt understand yet how to install drivers.
Buying a webcam for test recording with dailyroads
10/2013
Daytime LED headlights audi style
Ordered parts, dc-dc converters, otg cable, usb extension, switch on/off
Click to expand...
Click to collapse
WIRING DIAGRAM
Charging tablet and HUB: dc-dc 12v-5v 3a charges tablet + dc-dc usb 5v 2a for external powering a 4-ports hub.
Connected to HUB: Huawei 3G HSDPA stick, HD-3000 webcam, dvb/fm stick, extension usb cable (usb port in dash)
Source: __link
Click to expand...
Click to collapse
Phone: And a dual usb-port 5v 3a for charge my phone and fm transmitter (because my phones bluetooth wastes my battery)
ROM/KERNEL
USB-ROM (update 17-08-2013) with USB-host kernel by Timur __link1 __link2
Really the best ROM/Kernel for a car install.
One night (8 hours) without charging, only loss 2% batt. Also supports fast charging.
AUTO-POWER-ON WHEN IGN-ON __link
Even when n7 is completly off, when charger connected it automatically turns on.
Code:
fastboot oem off-mode-charge 0
revert:
Code:
fastboot oem off-mode-charge 1
BOOTANIMATION
This is what I did using photoshop and a simple tutorial:
It is only a sample, using desc.txt its faster than this gif.
Tutorial: __link
Click to expand...
Click to collapse
TASKER
When IGN-ON:
keyguard off, airplane mode off, GPS on, start video dailyroads, launch NDrive, play music,
WiFi on (for PPP Widget + 3G Huawei HSDPA), and keep display ON USB.
IGN-OFF:
airplane mode on, pause music, stop video dailyroads + kill app, go home page 1,
lock screen, kill all apps (dont needed apps), deep sleep
WEBCAM DASH + RECORDING
I bought a HD-3000 webcam thats connected via otg and hub. Reading this post u will know that is possible to connect webcams and uvc sticks+cctv cam.
All devices must be UVC-COMPLIANT, check this list: __link
After this, i've been testing dashcam apps like DailyRoads, AutoGuard, AutoBoy, iOnRoad. For me, till now, the best with my configuration is DailyRoads (and because its a free app)
If you have OBD2 BT adapter you can also use Torque + Track recorder plugin.
This configuration will disable your front cam. redeyedjedi said that found a way to make both work, but I already try it and get stuck on bootloader.
Anyone please try his solution: __link
THIS IS ALL I USED:
My beautiful NEXUS 7 32GB WIFI :')
OTG cable (transform it myself to do a OTG-Y-cable + external powering hub, see wiring diagram)
OTG Angled cable
DVB FM rtl2832u (waiting for it)
Huawei 3G hsdpa stick (w unlimited traffic)
USB HUB 4ports
USB extension (from hub to dashboard)
Dual usb port charger 5v 3a
DC-DC 12v-5v 3a
Voltmeter & Ampmeter
Cooling system
Webcam Microsoft HD-3000
FM Transmitter (for phone)
3,5mm spliter + 3,5mm to RCA cable (left/right)
Cable directly from positive battery with 10a fuse
ON/off switch / circuit breaker
OBD2 ELM327 BT (dont work with this car)
APPS INSTALLED AND WHY
Free:
PPP Widget -using for connect my 3g stick, internet anywhere with a wifi n7 :')
3CX Phone -for VoIP calls (with free calls (only for Portugal fixed numbers))
Deliveries -real time parcels tracking
Audio Glow Visualizer -only used when dont need gps (thanks to PHiL_G4 & Kookie_Monster)
MX Player
NDrive 10 -navigation app (offline maps)
DailyRoads +HD-3000 -very nice, dash cam recording app
*not tested* SDR Touch + RTL2832u driver (If works fine, maybe need to change a bit of this project and dont keep the headunit)
Paid:
Poweramp PRO +ICS Theme -for me, best music player.
Solid Explorer PRO -organize, manage files
Torque PRO -amazing!
Tasker PRO
FUTURE TO DO LIST
Have to try somehow if can have two cameras connected (webcam in dash and a rear cam).
Webcam should still recording, and when put in rear gear it opens carcam app ou simplewebcam app to show rear cam.
Dont know if this will work. __link
I have a Easycap 4CH 1c88:0007 but cant put it working, someone knows how to install it? Drivers? Non-compatible?
PLEASE, IF YOU HAVE ANY SUGGESTION, I'M KINDLY LISTENING TO ALL OPTIONS
.

Shooting time
Reserved for beautiful pics.

Having a T5 and thinking about transforming my simple din sony car unit into a multimedia center with a nexus 7, I'm very interesting about seeing how you integrated it into the dashboard.
If you have any picts of the nexus in place would be great.
Thx in advance ! T5 rules

Xyleme said:
Having a T5 and thinking about transforming my simple din sony car unit into a multimedia center with a nexus 7, I'm very interesting about seeing how you integrated it into the dashboard.
If you have any picts of the nexus in place would be great.
Thx in advance ! T5 rules
Click to expand...
Click to collapse
Hey!
I actually have a T4 so its a bit easier, but you can look for a din that fits with n7
link1 link2 link3 link4
Hope this help you, I think you want OEM original look.
Tell me if you get it done

Nexus 7 in-dash car install in Citroën DS5

Hello all,
I've installed a Nexus 7 model 2012 inside my Citroën DS5 (French car). The project is to replace the small original LCD monochrom monitor for car audio (for multimedia only, no GPS).
There was no important mechanical modifications needed, because the original dashboard supports 7 inches first mount original GPS.
The original radio unit FM + CD reader + control buttons are kept. The tab will only be used as external peripheral for multimedia :MP3 and GPS.
In this car I've a duplicate screen on main driver dashboard about FM radio station, so when using FM Radio I can see the selected channel on this screen.
So in fact the main radio unit will 90% be left in "Auxiliary" source and the other 10% "FM radio" source.
Part list :
- Nexus 7 2012 with USBROM
- OTG cable
- USB Hub
- DC to DC 12V to 5V - 5A converter (found on ebay)
- 3 push buttons extracted from an old credit card format IR remote control
- RF cable
- Some wires, soldering material...
Applications :
- JetAudio Music Player (My advice, the best one for in car use)
- Night mode
- Android Weather Clock Widget
- Mappy GPS free (French GPS app), alternatively Tomtom
Installation schematic :
Coming soon. I'm not able to post image links as new user. See attachement.
Notes:
- I've added external GPS antenna because reception was bad using built in antenna. I've just soldered a RF cable on the GPS antenna connector on the mainboard and soldered the small GPS antenna at the end of RF cable,
- The 3 power on and volume buttons have been deported to accessible part of the car. I don't need to use them usually, but in case... I will be able,
- First tries by connecting DC 5V to the USB hub were showing really slow charging. I'v found a thread studying that and it's mainly due to the cable loss. standard USB cable are low section, and as I was going through USB Hub + USB cable + OTG cable... I was measuring less than 4.85V at tablet connector instead of 5.1V at DC converter output. So I've soldered highest section power cables directly after Micro-USB of the tablet and limiting the length to 50cm... Now good success with fast charging.
Tablet Installation :
Coming soon. I'm not able to post image links as new user. See attachement.
I'll try to let this thread as alive as possible.
Thanks for reading, and sorry for my English langage mistakes.

That looks like a very clean install. Nice post.
I have been trying to figure out how to install my Nexus 7 to my car but as it already has a stereo I want to keep i have to find another method.
awesome stuff though !
---------- Post added at 03:15 PM ---------- Previous post was at 03:10 PM ----------
I forgot to ask, is heat a concern for the unit when installed like that and... with the tablet screen on for extended hours is burning an image into the screen not a concern when doing these installs into cars?
I have a S3 which i use as my GPS and do some long road trips. It has now got the point where the map app has burned into the screen faintly. I am wondering if the Nexus 7 would suffer the same result?

Nice, thanks for sharing.
I'm tempt to start something like that in my car, but for now i'm only collecting ideas.
How did you managed to get FM radio on N7?
So far, AFAIK people can get radio on Nexus 7 with bluetooth tethering (unless your N7 has 3G). But then you need a 3G or 4G plan in other phone...
I'm maybe build a customized menu with Zooper Pro, with icons for GPS (tomtom), Radio and USB Audio (jetaudio)..(something fancy like XBMC) and maybe later could add other functions like video or internet browsing.

esotericrj said:
That looks like a very clean install. Nice post.
I have been trying to figure out how to install my Nexus 7 to my car but as it already has a stereo I want to keep i have to find another method.
awesome stuff though !
---------- Post added at 03:15 PM ---------- Previous post was at 03:10 PM ----------
I forgot to ask, is heat a concern for the unit when installed like that and... with the tablet screen on for extended hours is burning an image into the screen not a concern when doing these installs into cars?
I have a S3 which i use as my GPS and do some long road trips. It has now got the point where the map app has burned into the screen faintly. I am wondering if the Nexus 7 would suffer the same result?
Click to expand...
Click to collapse
I've edited main presentation, but I would like to precise that the main stereo unit is kept in this project. Only one simple screen has been removed to be replaced by the tablet. I had the chance in my car to be able to find easy area to put the tablet without needing to remove important unit and replace main stereo.
I'm suprised and not aware about LCD screens that could burn when same image shown during long period. Thought it was for the old screen technolgies. On the other hand, a lot of actual cars are embedding touchscreen tablet similar by default. So I think the technology is now proven. Anyway, I am not using any specific dashboard app for the tablet and so using directly the applications and switching for instance from GPS app to music app.

ruicc said:
Nice, thanks for sharing.
I'm tempt to start something like that in my car, but for now i'm only collecting ideas.
How did you managed to get FM radio on N7?
So far, AFAIK people can get radio on Nexus 7 with bluetooth tethering (unless your N7 has 3G). But then you need a 3G or 4G plan in other phone...
I'm maybe build a customized menu with Zooper Pro, with icons for GPS (tomtom), Radio and USB Audio (jetaudio)..(something fancy like XBMC) and maybe later could add other functions like video or internet browsing.
Click to expand...
Click to collapse
As edited in main presentation, the main radio unit is kept. So FM radio is left to the main radio unit. I'm using the original buttons below the tablet to control the radio. I'm also still using the original stereo volume buttons including the ones at steering wheel.
For the moment I'm using the standard android desktop and widgets that fits to my utilization, as I only use 2 main application for my tablet ; One for GPS and the second for music.

Few updates since last time on this topic.
I've encountered slow charging issue already encountered by some people. It was discharging faster than charging...
It's linked to the connector inside the tablet between USB PCB board and Mainboard. The solution I've found is to solder directly the USB power to the ribbon cable by removing plastic protection enveloppe on it. Now no issue anymore.
Sometimes I had also issues on GPS reception. I've also soldered a 2m length RF cable to the GPS connectors on the board, and passing it to the dedicated windshield area (UV metallic shield free area). I let a 5cm length internal wire of the RF cable visible on this area, and get better GPS fix statistics.
I need to work on this part to finish a proper installation instead of wire visible on the top of the windshield.
On the other side I've also finished the installation of the rear view camera. I'm using USB video grabber (EASYCAP type) + car camera rear view (easy to find for few dollars on the net).
Presentation of the system available on youtube keywords "Nexus 7 DS5" (sorry I cannot post hyperlinks as new user and sorry again comments are in French):

Remix OS carputer build

Hello guys, I'm planning to build my first carputer. 2 years ago I have modified a tablet, Asus zenpad 8, very similar to Nexus 7 in my opinion. Now I want something more.
What I want:
Fully automated pc that works exactly like an android head unit but much better and more flexibility when it comes to external devices like an external DAC with optical output. Actually this is the main reason for not buying an android head unit, didn't find one that works very well with an external DAC. Some other things that I want from this carputer: the compatibility with steering wheel controls, backup camera, fm or even DAB radio, gps, phone calls( via bluetooth), 4G internet and so on. Many of those things are pretty simple to integrate, will talk about them later.
The components:
1. The pc - didn't think about it yet because there are loads of mini pc on the market for good prices. The only problem I'm thinking is the start up on ignition. First I wanted to go for a Remix mini pc but I don't know how could I make it start on ignition and after that automatically play the last song. If I would go for a normal PC, I found a smart PSU which has the possibility of ignition start and stop and puts the computer in sleep mode. That way I will avoid the waiting time for the boot, in fact the computer will be permanently turned on. The only problem I can think of, is the compatibility of this PSU with the android Remix OS. Is it possible?
I've tested the Remix OS and I like it, very quiq, easy to use in car with a touch screen, support all the external devices( wifi, 4g, fm and DAB, external DAC with optical output) and the launcher can be changed. I know I can opt for Windows OS and that way I will be sure that the PSU works but in my opinion windows is not so "mobile friendly", not so easy to use in car.
2. The screen: not so many to talk about, found on ebay some 9" tft touch screens, very good resolution, hdmi connectivity and USB for touch. The best thing with these screens is the AV2 input for the backup camera. The screen automatically switch to this input, has guidance lines, and this way I solved the problem with the camera. And also is quite cheap.
3. Steering wheel controls. Found on ebay the Joycon steering wheel adapter that is compatible with Android. I just have to make an initial configuration and that's it, nothing more, simply works through USB.
4. The other external devices: all of them can be found on ebay for good prices. The only thing that worries me is the bluetooth compatibility. I remember when I built that Asus zenpad tablet, I couldn't find a solution for this. Now my question is, what type of bluetooth adapter should I buy and how do I integrate this in the carputer. And I'm not talking about physical connection, I think I will need some kind of software, app, that knows what to do with this bluetooth adapter.
So, in the end, I would need some help regarding the ignition start, just the hardware part of it, all the other automatic things (launch the app and play the song) can be made with tasker very easy. Also I would need some help with the bluetooth phone calls.
Hope I didn't miss any important thing and I will appreciate any help. Thanks.

yoiedi said:
Hello guys, I'm planning to build my first carputer. 2 years ago I have modified a tablet, Asus zenpad 8, very similar to Nexus 7 in my opinion. Now I want something more.
What I want:
Fully automated pc that works exactly like an android head unit but much better and more flexibility when it comes to external devices like an external DAC with optical output. Actually this is the main reason for not buying an android head unit, didn't find one that works very well with an external DAC. Some other things that I want from this carputer: the compatibility with steering wheel controls, backup camera, fm or even DAB radio, gps, phone calls( via bluetooth), 4G internet and so on. Many of those things are pretty simple to integrate, will talk about them later.
The components:
1. The pc - didn't think about it yet because there are loads of mini pc on the market for good prices. The only problem I'm thinking is the start up on ignition. First I wanted to go for a Remix mini pc but I don't know how could I make it start on ignition and after that automatically play the last song. If I would go for a normal PC, I found a smart PSU which has the possibility of ignition start and stop and puts the computer in sleep mode. That way I will avoid the waiting time for the boot, in fact the computer will be permanently turned on. The only problem I can think of, is the compatibility of this PSU with the android Remix OS. Is it possible?
I've tested the Remix OS and I like it, very quiq, easy to use in car with a touch screen, support all the external devices( wifi, 4g, fm and DAB, external DAC with optical output) and the launcher can be changed. I know I can opt for Windows OS and that way I will be sure that the PSU works but in my opinion windows is not so "mobile friendly", not so easy to use in car.
2. The screen: not so many to talk about, found on ebay some 9" tft touch screens, very good resolution, hdmi connectivity and USB for touch. The best thing with these screens is the AV2 input for the backup camera. The screen automatically switch to this input, has guidance lines, and this way I solved the problem with the camera. And also is quite cheap.
3. Steering wheel controls. Found on ebay the Joycon steering wheel adapter that is compatible with Android. I just have to make an initial configuration and that's it, nothing more, simply works through USB.
4. The other external devices: all of them can be found on ebay for good prices. The only thing that worries me is the bluetooth compatibility. I remember when I built that Asus zenpad tablet, I couldn't find a solution for this. Now my question is, what type of bluetooth adapter should I buy and how do I integrate this in the carputer. And I'm not talking about physical connection, I think I will need some kind of software, app, that knows what to do with this bluetooth adapter.
So, in the end, I would need some help regarding the ignition start, just the hardware part of it, all the other automatic things (launch the app and play the song) can be made with tasker very easy. Also I would need some help with the bluetooth phone calls.
Hope I didn't miss any important thing and I will appreciate any help. Thanks.
Click to expand...
Click to collapse
Have you thought about using a rock 64 single board computer like a Raspberry Pi that Android is really supported something like that could work really well as it has gpio outputs for various functions USB inputs for audio dacs and DAB radio and can work with touch screens or even projectors for heads up.

The truth is I know nothing about raspberry pi, heard about them but nothing more. Can you please explain a bit more? Is it possible to make it automatically turn on/off on ignition? How? Apparently that's the hardest part of the job. I've read on the internet that Remix OS doesn't work very well with stand-by function and if I'll make it to shut down completely, I'm afraid that will take too long to boot back. I was thinking about Remix mini pc and a controller that simulates pressing of the on/off button simultaneously with the ignition but it has to be tested.

So, quickly searched on google about raspberry pi and banana pi possibilities, there are some power supplies for in car use, basically they simulate a shut down from the button with a delay. That looks very good, very easy to do and also very cheap. But, how fast can boot a raspberry or banana pi running Remix OS? Does anyone know?

yoiedi said:
The truth is I know nothing about raspberry pi, heard about them but nothing more. Can you please explain a bit more? Is it possible to make it automatically turn on/off on ignition? How? Apparently that's the hardest part of the job. I've read on the internet that Remix OS doesn't work very well with stand-by function and if I'll make it to shut down completely, I'm afraid that will take too long to boot back. I was thinking about Remix mini pc and a controller that simulates pressing of the on/off button simultaneously with the ignition but it has to be tested.
Click to expand...
Click to collapse
To make it turn off and on with the ignition, just plug it into a 12v line that is powered when ignition is on. Generally the 12v line to your head unit fits that criteria. If you want constant power to keep the device in standby mode, you can connect a relay to an a wire that is powered when the car is powered, then use the relay to short the pins of the standby button.
For boot time, you can achieve quite a bit of improvement by getting the fastest sdcard you can buy.

Thanks for advice. I've searched on youtube how android works with raspberry pi and in my opinion they don't do it very well, I mean it struggles even on youtube playing videos. So, I bought an ssd hdd, 32gb and made some tests on my pc. Found a version of android 7 special made for in car use and I'm quite happy with it until now. This android has a "special" feature, when the power button is pressed the pc shut down without displaying any confirmation message on screen. That means it will work perfectly with an intelligent power supply like m2-atx, m3-atx etc. In the next few days I'll get a new pc, micro atx mainboard so I'll begin the tests on that. Until now I've got a boot time around 30-40 seconds. Is not a bad time but I'll try to remove the unnecessary apps from startup and see what happens then. I'll post some pictures or even videos when I'll have good results. Any advice is welcome. Thanks.

yoiedi said:
Thanks for advice. I've searched on youtube how android works with raspberry pi and in my opinion they don't do it very well, I mean it struggles even on youtube playing videos. So, I bought an ssd hdd, 32gb and made some tests on my pc. Found a version of android 7 special made for in car use and I'm quite happy with it until now. This android has a "special" feature, when the power button is pressed the pc shut down without displaying any confirmation message on screen. That means it will work perfectly with an intelligent power supply like m2-atx, m3-atx etc. In the next few days I'll get a new pc, micro atx mainboard so I'll begin the tests on that. Until now I've got a boot time around 30-40 seconds. Is not a bad time but I'll try to remove the unnecessary apps from startup and see what happens then. I'll post some pictures or even videos when I'll have good results. Any advice is welcome. Thanks.
Click to expand...
Click to collapse
Check these out http://www.hardkernel.com/main/main.php

yoiedi said:
Thanks for advice. I've searched on youtube how android works with raspberry pi and in my opinion they don't do it very well, I mean it struggles even on youtube playing videos. So, I bought an ssd hdd, 32gb and made some tests on my pc. Found a version of android 7 special made for in car use and I'm quite happy with it until now. This android has a "special" feature, when the power button is pressed the pc shut down without displaying any confirmation message on screen. That means it will work perfectly with an intelligent power supply like m2-atx, m3-atx etc. In the next few days I'll get a new pc, micro atx mainboard so I'll begin the tests on that. Until now I've got a boot time around 30-40 seconds. Is not a bad time but I'll try to remove the unnecessary apps from startup and see what happens then. I'll post some pictures or even videos when I'll have good results. Any advice is welcome. Thanks.
Click to expand...
Click to collapse
Why don't you get an android head unit?

gtxaspec said:
Why don't you get an android head unit?
Click to expand...
Click to collapse
I think you didn't read, I couldn't find any that works with an external sound card(DAC). My audio system is quite expensive, made for sound quality, and of course I want the head unit to be as good as possible. An external sound card with optical output I think is the best you can get.

Google search "raspberry pi alternative" theres lots of these little gadgets now adays, raspberry pi 3B is one of the most popular ( and cheapest) but there are more out there that are more powerful & better hardware.. The ASUS Tinkerboard is becoming popular as well I think I may be getting one for a streaming machine.

I've already purchased the PC and ordered the PSU. The price for all those components(+ a 30gb ssd) was under 100£ so not very expensive. Why I went for a pc instead of a single board pc? I don't know, maybe because I have no previous experience with them. Yes is true that is way much bigger than a raspberry alternative and the power consumption as well but I don't mind, maybe in the future when I'll get bored again I will try one of those pc's.
So, I've tried to install the Android X86 64bit (there is one version on internet with a patch that removes the confirmation message when you want to shut it down) on this pc with no success, all I've got was a black screen or a continuous reboot. Found out that Android X86 64bit is not so friendly with AMD cpu's. Should've search for that before buying it. Anyway, tried the 32bit version so that one works very well but I didn't find any with that patch installed. How can I remove that confirmation message when the power button is pressed?
Thanks.

first tests, quite happy with it, still lot of work to do.
https://youtu.be/lNJmRjXG81A

Odroid C2 with android + kodi