Question about splitting USB signal

ZeroZero

Member
Joined
Aug 9, 2012
Messages
81
Hi all,
I have a new golf SE Nav. It has one USB port, which I have to use to plug in my iphone 6. I wanted to split this so that I could also put in a USB stick which has a lot of my songs on it. I tried using a cheap ebay hub I have but the dreaded "device not recognised" message comes up (though the hub works elsewhere). Are there good hubs and bad? I know for example that a usb cable plugged into the cigarette lighter will charge a phone but not transfer data.

I would be happy to fit an after market USB port if it were feasible.

?

Z
 

Crasher

Administrator
Staff member
Joined
Apr 22, 2006
Messages
26,690
Location
Nottingham, England
I needed to put a hub in a project Golf 5 so that it could have a dash PC showing the diagnostic display of VCDS and the aftermarket engine management system. I had a struggle finding a USB BUS that worked and not misdecribed as a BUS when it was only a charge but I found the https://www.atolla.us/product/atolla-4-port-usb3-hub. To make this work properly I had to use an accessory socket USB adapter and a USB to suitable 1.35/3.5 mm pin plug so for less than £20 I had a very effective car hub with expansion room.
 

ZeroZero

Member
Joined
Aug 9, 2012
Messages
81
To make this work properly I had to use an accessory socket USB adapter and a USB to suitable 1.35/3.5 mm pin plug so for less than £20 I had a very effective car hub with expansion room.

I did not understand this bit. I have a single USB port (not just a charger) in my golf surely I could just plug it in? It does not look like it needs additional power like some PC hubs
 

Touranasaurus

Member
Joined
May 18, 2013
Messages
416
Location
Buckinghamshire
Are you using the USB socket to charge the IPhone or to communicate with the IPhone? If its only for charging a separate charger insert for the 12v socket might be less hassle.
 

ZeroZero

Member
Joined
Aug 9, 2012
Messages
81
I have now tried a USB hub, and a audio to USB cable and both do not work. I would like to use my USB sticks to play audio whilst my apple phone is also plugged in. I have not found a way of doing so. If I plug in the USB stick via the audio/usb cable it says "track list not recognised". If I try the phone it says device not recognised. The tracklist is identical to an SSD I have so the identical music plays via SSD (which I copied as a test).
Obviously, I need a USB port that does more than charge, one that also transfers data. Does anyone know how I can do this?

Z
 

Touranasaurus

Member
Joined
May 18, 2013
Messages
416
Location
Buckinghamshire
ZeroZero at the risk of being a wet blanket... I think what you are attempting may not be possible. USB ports and connections on phones and in cars do not necessarily conform to the full USB specification as used by PCs. On a PC there are USB drivers running on the hardware that actually manage the transfer of data and communications with the devices that are attached to the USB ports. When you connect a hub to a PC USB port the PC has to manage the additional USB ports on the Hub effectively there are now 4 physical ports with separate addresses that are accessed through the one PC USB port.

I suspect that the hardware built into the media/radios within cars only supports a subset of the USB specification, quite possible only the power and Audio signals. Its possible that both phone and car manufacturers have selected the USB connector for these functions because its a universally available connector.

My Touran has a Media interface which has a custom VW plug and socket, there are various cables with different ends, full size USB, micro USB, Apple Ipod/IPhone etc. When I use the USB connectors its just power, I have to use Bluetooth audio to get music off a non-apple phone. With an Ipod or IPhone the custom plug and socket provides a lot more functionality, the radio is able to navigate the music library on the Ipod.
 

ZeroZero

Member
Joined
Aug 9, 2012
Messages
81
ZeroZero at the risk of being a wet blanket... I think what you are attempting may not be possible. USB ports and connections on phones and in cars do not necessarily conform to the full USB specification as used by PCs. On a PC there are USB drivers running on the hardware that actually manage the transfer of data and communications with the devices that are attached to the USB ports. When you connect a hub to a PC USB port the PC has to manage the additional USB ports on the Hub effectively there are now 4 physical ports with separate addresses that are accessed through the one PC USB port.

I suspect that the hardware built into the media/radios within cars only supports a subset of the USB specification, quite possible only the power and Audio signals. Its possible that both phone and car manufacturers have selected the USB connector for these functions because its a universally available connector.

My Touran has a Media interface which has a custom VW plug and socket, there are various cables with different ends, full size USB, micro USB, Apple Ipod/IPhone etc. When I use the USB connectors its just power, I have to use Bluetooth audio to get music off a non-apple phone. With an Ipod or IPhone the custom plug and socket provides a lot more functionality, the radio is able to navigate the music library on the Ipod.

Thank you. You are no "wet blanket". You are prossibly right, your explanation makes some sense. My VW golf Mk 6 Match had a custom VW plug with a VW /USB lead. When I plugged in these same USB sticks they worked on that machine, but this may be a different tale...

thanks for the input

Z
 

themogwai

New member
Joined
Jul 4, 2019
Messages
4
I'm interested in any advance on this topic...particularly regarding size of USB memory sticks etc. I have all my music collection on data sticks for use in the car but, knowing I was getting a new car (SHARAN SE Nav 2.0 auto) I bought a nice, big 256GB stick.

I tried it in the USB slot with just one album on it and, wow - it even played FLAC! Bye bye lossy mp3s and hello full quality audio! Or so I thought...

I then spent 3 days transferring hundreds of albums to FLAC and transferring them to the stick...and, today, when I plugged it in it played for 30 seconds and crashed the entire system! It rebooted, started the track again and crashed again...and again...and again...so I unplugged it. The system was so confused by then it wouldn't recognise anything - even my phone via Bluetooth - but after stopping for ten minutes at a pick up it would read my other sticks again...the 256GB one just crashed the system again!

Ho hum...
 

ZeroZero

Member
Joined
Aug 9, 2012
Messages
81
FYI I never got it working. Frankly I find the tech on the car a bit of a mess. I simply can't be bothered to hard wire my phone it to get apple play too. It's all too hotch potch. I just use an SSD card and copied by USB stick to it.
 
Top