OpenWrt Forum Archive

Topic: Use USB's D+ and D- as GPIO. Is it possible?

The content of this topic has been archived on 4 Apr 2018. There are no obvious gaps in this topic, but there may still be some posts missing at the end.

Post #1
datacable
10 Oct 2014, 09:11

Hi!

I wonder, if it's possible to change D+ / D- operation mode from USB to GPIO.

I my case I have TL-WR703N (and also Hame MPR-A2 is on the way from china).
I want to connect an ADC board that needs just 2 pins to communicate (that one: http://www.ebay.com/itm/Force-Module-Du … 9042e6d1).

If this would be possible, I could just connect this board direct to USB socket. And this would make it much easier for many people - there's no need to open the router or make any small soldering.

Post #2
datacable
11 Oct 2014, 05:41

Well, I've checked the datasheet of RA-5350f (Hame MPR-A2), it's not possible to change USB pin's mode to GPIO. However, this is possible for UARTs TX-RX pins, that can be useful in some cases.
Probably it's the same for Atheros AR7240.

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