B6 & B7 Android Google Nexus 7 2013 Tablet Install Guide

[BARRY]

Hey guys,
I spent a lot of time trying to find a concise guide, but was always left shorthanded due to lack of information. So after lots of research, I have determined that I will need to write one of my own. Through trial and error I've successfully been able to integrate my an Android tablet into my deck as a full functioning head unit. Below I will list the components I used. I also removed the factory battery and hardwired this to battery+ through way of USB. You'll need to build the external volume control knob. Its fairly easy, but takes some trial and error. You'll need to install software to load the code onto the board. Once that has been completed it should be plug and play.

If you plan to hardwire the tablet to your car's battery, please make sure you do NOT use a USB adapter that outputs more than 2.1a. 1.0amp's is not enough to power the device and anything more than 2.1a will fry your tablet mainboard. I have wired in 2 cigarette lighter inputs. One using a tap-a-fuse to the factory fuse box for a 12v+, and the other to the 12v SWITCHED radio wire.

This guide should work for all other vehicles for the most part. I have successfully done an install to my brothers Subaru BRZ, with adaption to his Rockford Fosgate 360.3 DSP.

Things to Note:

• You'll need to apply switched usb power to the usb hub
• The hub will be plugged into the OTG Y Cable which will power it
• The USB HUB will need to support external power. Some work IF you apply power to one open port
• You will need to apply power to the USB HUB or your devices will state they do not have enough power
• The OTG Y Cable will also need to be plugged into switched usb power. Likely USB adapter to cigarette socket
• You'll need to update your tablet operating system and kernel to support functionality
• You'll need tasker to trigger power on and power off functions

References and Components:
Setting up ADAFRUIT Trinket as volume control knob:

• https://learn.adafruit.com/trinket-u...-knob/overview
• https://learn.adafruit.com/introduci...th-arduino-ide

Android OS/ROM/Kernel:
PureNexus ROM 6.0.1 Marshmallow:

• https://forum.xda-developers.com/nex...ayers-t3190370

ElementalX 5.16 OTG Support Kernel:

• https://forum.xda-developers.com/sho....php?t=2389022
• https://elementalx.org/devices/nexus-7-2013/

Android Installed Software:

• Tasker - https://play.google.com/store/apps/d....taskerm&hl=en
• Nova Launcher - https://play.google.com/store/apps/d...launcher&hl=en
• TOMTOM - https://play.google.com/store/apps/d...y.navapp&hl=en
• Pandora - https://play.google.com/store/apps/d....android&hl=en
• Secure Settings - https://play.google.com/store/apps/d...s.plugin&hl=en
• KLWP Live Wallpaper Maker - https://play.google.com/store/apps/d...allpaper&hl=en
• Phonograph - https://play.google.com/store/apps/d...amophone&hl=en
• WAZE - https://play.google.com/store/search...e&c=apps&hl=en
• Google Maps - https://play.google.com/store/apps/d...pps.maps&hl=en
• Wavesink Plus DAB+ FM-RDS - https://play.google.com/store/apps/d...sinkplus&hl=en

RADIO INTERFACE: PAC C2R-AUDI Radio Replacement Interface with Navigation Outputs for Select 2005-Up Audi Automobiles

• $68.12 - https://www.amazon.com/gp/product/B003E3KRDU
• $59.99 - Alternative - Enfig SRWH-AUD2-B - http://enfigcarstereo.com/ENFIG_SRWH_AU2.html

TABLET: Asus Google Nexus 7 16GB Tablet (Gen 2), 7 Inches (Certified Refurbished)

• $126.85 - https://www.amazon.com/gp/product/B018URWWLE/

DAC(Digital Audio Converter): Behringer uca202/uca222

• $29.99 - UCA-222 - https://www.amazon.com/gp/product/B0023BYDHK/
• $29.99 - UCA-202 - https://www.amazon.com/gp/product/B000KW2YEI/

OTG Cable: 90 degree Y split OTG cable - 90 degree / right angle / left angle

• $1.58 - eBay
• $6.99 - Micro USB Male To USB Female Host OTG Cable + USB Power Cable Y Splitter - https://www.amazon.com/gp/product/B00NSBVNCM/

GROUND LOOP ISOLATOR: rolls HE18 Hum Eliminator

• $45.00 + $6.95 shipping - https://www.amazon.com/gp/product/B004E4LU0W/
• $7.13 - Cheaper Alternative - PAC SNI-1 Noise Isolator - https://www.amazon.com/gp/product/B000K50HJE/

BLUETOOTH PHONE ADAPTER: SoundBot SB360 Bluetooth 4.0 Car Kit Hands-Free Wireless Talking & Music Streaming Dongle

• $19.95 - https://www.amazon.com/gp/product/B00RH29CJO/

GROUND LOOP ISOLATOR AUX: AUKEY Ground Loop Noise Isolator for Car Stereo Systems and Home Audio Systems, 3.5mm Audio Cable Included

• $9.99 - https://www.amazon.com/gp/product/B01L1NP7YI/

FM RADIO ADAPTER: eBay, your choice of RTL2832U chipset units

• $7.30 - eBay
• $23.95 - NooElec NESDR RTL-SDR & ADS-B USB Receiver RTL2832U & R820T2 - https://www.amazon.com/gp/product/B00VZ1AWQA/
• $20.95 - RTL-SDR Blog R820T2 RTL2832U 1PPM TCXO SMA Software Defined Radio (Dongle Only) - https://www.amazon.com/gp/product/B0129EBDS2/

VOLUME CONTROL INTERFACE BOARD: Adafruit Trinket - Mini Microcontroller - 3.3V Logic, I'm sure the 5v unit would work as well. It is part number 1501 instead of 1500

• $6.95 - https://www.adafruit.com/product/1500
• $5.42 - https://www.arrow.com/en/products/15...uit-industries

VOLUME CONTROL KNOB: Bourns Optical Encoder Rotary, a rotary encoder will not have a start and stop like a potentiometer

• $3.85 - https://www.arrow.com/en/products/pe...s-s1024/bourns

EXTERNAL VOLUME CONTROL KNOB: Uxcell Potentiometer Control Knob (5 Piece)

• $6.23 - https://www.amazon.com/gp/product/B00EZK4C1O/

RCA TO AUX CABLE: Monoprice 6inch Premium 3.5mm Stereo Female to 2RCA Male 22AWG Cable (Gold Plated) - Black (2 Pack)

• $11.90 - https://www.amazon.com/gp/product/B01K276GIU/

RCA AUDIO CABLE: Bonayuanda 3 RCA Male Jack to 6 RCA Female Plug Splitter Audio Video Av Adapter Cable 12inc

• $6.69 - https://www.amazon.com/gp/product/B01J007XGO/

RADIO FACEPLATE: Enfig RMK8-A4B67

• $49.99 - http://enfigcarstereo.com/ENFIG_RMK8_A4B67.html

USB HUB: TBD, eBay one I purchased died, and not all USB hubs support external power input (if not you can use one of the USB ports as a power input from cigarette USB adapter)

• $12.99 - eBay Generic Hub that accepts external Power (failed on me, but worked flawlessly until failure)
  
  
  Currently using this unit, which works, but my volume control knob does not seem to work with it:
  7-Port USB Hub with on/off Switch, Black
• https://www.amazon.com/HDE-SuperSpee...dp/B00L5IS9KE/
  
  Also tried this unit but, volume control doesn't seem to work as well unless physically hot plugged:
• $11.99 - Cateck Premium 7-Port Aluminum USB Hub with 2-Foot Shielded Powered Y-Cable - https://www.amazon.com/gp/product/B00VH5KO4Y

CIGARETTE OUTLETS: eBay or Amazon

• $0.79 - eBay
• $6.19 - uxcell Car Charger Power Cigarette Lighter Female Socket Black w 26cm Cable- https://www.amazon.com/gp/product/B00EZJBELQ/
• $9.88 - Ambuker DC 12V/24V Dual Cigarette Lighter Plug Socket - https://www.amazon.com/gp/product/B07116RNCV/

CIGARETTE USB ADAPTERS (you'll need 2, bluetooth adapter comes with 1): RAVPower Quick Charge 3.0 54W 4-Port Car Charger

• $9.74 - https://www.amazon.com/gp/product/B01LCFEQM4

DOUBLE SIDED TAPE: 1 Roll 0.6cm Car Double Sided Adhesive Strong Adhesion Sticky Foam Tape House 3M

• https://www.amazon.com/gp/product/B01G3JGBK4/