OTG cabling

Wiring best practices and loom building technique
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Pockets
Posts: 6
Joined: Fri May 30, 2014 12:42 am
ECU Model: S40 Pro
Distributor: Watsons
Firmware Version: 62

OTG cabling

Post by Pockets »

I'm setting up a new Lenovo 7" tablet in my Mini/VTEC to serve as a cheap alternative to the X-dash. I'm trying to avoid wiring in a charger for the tablet so I'm considering OTG as a possible route. Main question is - does the DTA's 15 pin serial port have a pin with sufficient power to charge a tablet, even a trickle? If so I'll play round with OTG cabling to see if I can make it happen. Which could be tricky as I'll need 15 to 9 pin, then 9 pin to Micro-USB, or to USB and then to Micro-USB, all RS232. And yes, the tablet is OTG ready.
Alex DTA
Posts: 1622
Joined: Fri Feb 28, 2014 1:03 pm
ECU Model: S40 Pro
Distributor: DTA
Firmware Version: 79

Re: OTG cabling

Post by Alex DTA »

No, the ECU cannot charge the tablet. You need a 5v supply from somewhere, and most tablets require 1.5Amps, not something the ECU 5v output can handle.

The other problem is most devices won't allow charging and data at the same time, hence the BT solution.
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