On Wednesday 06 Feb 2013, Brendan Simon (eTRIX) wrote:
> I'm looking for a very small and very low cost SBC with a USB host port,
> serial port (UART or RS485) and Ethernet (10 or 10/100).  The purpose is
> to bridge between two systems -- one system is a piece of equipment that
> only has a USB device port (serial protocol) and the other is a master
> controller which can have Ethernet and/or RS485.
> 
> I was hoping to also add other services such as :- web browser, FTP
> server, etc, which led me towards an openwrt solution as possibility.
> 
> The best board I've come up with is a TP-Link TL-WR703N.  It is cheap,
> has Ethernet (and wifi) and an internal serial, but the internal serial
> is just a couple of pads (I'd prefer a proper connector) and I'm not
> sure I can modify it for RS485 (e.g. provision for a Tx/Rx enable
> signal).  Two serial ports and/or two usb ports would be nice but not
> necessary.
> 
> I was wondering if anyone could suggest other boards/products to look at :)
> 
> Thanks, Brendan.
Have you looked at the carambola?  The current version has some problems
with USB (earthing problems on the shield), but a new version is due this
month.  They use a version of OpenWRT as firmware.

David
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