[dspence44]

So I have my Nexus 7 installed in my E92, it is running Timur's Kernel, and everything is looking great, except.... There is some issue with the wiring and I cannot figure it out. The audio is supposed to be running through the USB so that you can only run one cord from the tablet, which gives it a cleaner look. So what you need is an OTG cable with power so that it can both charge the tablet and transmit audio data.

Right now I have the Nexus 7 connected through a standard USB cable. That cable then connects to an OTG with power cable. The OTG cable will then Y into two cables (one Male Micro USB, and the other is a Male USB). From here, I have the micro USB running to the power (through an adapter cable), and the Male USB is running into the DAC to transfer what should be audio data. After the DAC, I have an Auxiliary cord connecting the DAC to the car's AUX input. The tablet will charge with this set-up, but the audio will not go through the DAC (the power light on the DAC will not light-up with this configuration either).

Am I missing something obvious? How come I am getting no audio through my car? It's as if the tablet does not recognize to play audio through the USB and it simply plays through the tablets internal speakers. I have tried rebooting with the DAC plugged in so that it Boots knowing there is a DAC connected, but still no luck!

If someone could help me figure this out, I would appreciate it more than you know!

Cheers!

[7786]

The cable that connects directly to the Nexus 7s microusb slot needs to be OTG capable. Your problem is that you're connecting a standard USB cable to the Nexus 7, so you already lose that functionality by the time you get to your OTG cable.

[dspence44]

Originally Posted by 7786

The cable that connects directly to the Nexus 7s microusb slot needs to be OTG capable. Your problem is that you're connecting a standard USB cable to the Nexus 7, so you already lose that functionality by the time you get to your OTG cable.

Hmm interesting! How do I know which cables are OTG Capable? These are the links to the cables I am using.

90 Degree Micro USB: http://www.memoryexpress.com/Products/MX32416

USB Extension: https://www.amazon.ca/AmazonBasics--...=USB+Extension

Thank you very much!

[xyaaeg234g234]

Originally Posted by dspence44

Hmm interesting! How do I know which cables are OTG Capable? These are the links to the cables I am using.

90 Degree Micro USB: http://www.memoryexpress.com/Products/MX32416

USB Extension: https://www.amazon.ca/AmazonBasics--...=USB+Extension

Thank you very much!

https://amazon.com/Micro-Cable-Power.../dp/B009YPYORM

That's the one I picked up - haven't installed it yet. The listing does not specifically say Nexus 7 2013 but the following review confirms it does work with it.

https://amazon.com/review/R1XXYLE5YT...dp_lswr_rp_hza

[siphor1989]

Originally Posted by dspence44

Hmm interesting! How do I know which cables are OTG Capable? These are the links to the cables I am using.

90 Degree Micro USB: http://www.memoryexpress.com/Products/MX32416

USB Extension: https://www.amazon.ca/AmazonBasics--...=USB+Extension

Thank you very much!

It will specifically say if the cable is OTG compatible or not and by the looks of the 90 degree cable you linked to, it is not OTG compatible.

Or if you can modify your current adapter cable by bridging pins 4 and 5 on the micro usb connector end to make it OTG compatible. Otherwise, you want something like this: http://www.banggood.com/Micro-USB-90...-p-926167.html

Also, if you're planning on using extension cables, try to use the shortest cables possible and preferably high quality ones with 28/24 AWG wires. Otherwise, you're going to find that your tablet will not be able to charge quickly enough especially if you have the display on full brightness and a lot of cpu heavy apps running.

[dspence44]

Originally Posted by siphor1989

It will specifically say if the cable is OTG compatible or not and by the looks of the 90 degree cable you linked to, it is not OTG compatible.

Or if you can modify your current adapter cable by bridging pins 4 and 5 on the micro usb connector end to make it OTG compatible. Otherwise, you want something like this: http://www.banggood.com/Micro-USB-90...-p-926167.html

Also, if you're planning on using extension cables, try to use the shortest cables possible and preferably high quality ones with 28/24 AWG wires. Otherwise, you're going to find that your tablet will not be able to charge quickly enough especially if you have the display on full brightness and a lot of cpu heavy apps running.

Interesting, so that 90 degree might be my issue! I'll be ordering another one! Haha But other than that, the extension USB that I have will work fine right?

[dspence44]

Also, are all OTG Cables with Power the same? Does each wire have a specific purpose? Or can you connect then in any way as long as they are all connected.. Tough questions to explain, but is there a certain and/or proper way to connect the cables to the OTG with Power adapter?

[siphor1989]

Originally Posted by dspence44

Also, are all OTG Cables with Power the same? Does each wire have a specific purpose? Or can you connect then in any way as long as they are all connected.. Tough questions to explain, but is there a certain and/or proper way to connect the cables to the OTG with Power adapter?

The male end of the y adapter should be the power lines so that should be the end that's connected to your power source.

[dspence44]

Alright, so good news! Thanks for the input everyone! Turns out I just had some incompatible cables as part of my set-up! Got some new ones ordered and I'll be up and running this week!