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I want to use an Armmite board to communicate with another controller via USB,
then communicate with the world via 802.11 b/g WIFI.

Where can I get an inexpensive WIFI board that will interface to Armmite?

This is a good question!

> I want to use an Armmite board to communicate with another controller via USB,
then communicate with the world via 802.11 b/g WIFI.
>
> Where can I get an inexpensive WIFI board that will interface to Armmite?

We've been using the Roving Networks RN-131 for a project using the LPC1756. I
don't know if there is enough interest to turn it into a product (available as a
breakout board or shield for PRO family)

http://www.sparkfun.com/products/10004

Another option is the Wiznet module, but we don't have any experience with that.

The ARMmite is a USB slave/client so it can communicate to a host, normally a
PC, but could be another controller.

Actually, if I can install a USB interface on that RN-131 and make it the Host
for my other controller, I don't need an Armmite board.

> Actually, if I can install a USB interface on that RN-131 and make it the Host
for my other controller, I don't need an Armmite board.
>

The RN-131 doesn't support that, but the LPC1756 does have an OTG (on the go)
USB interface which supports both host and client interfaces.

While we don't have a BASIC library for that NXP publishes sample C code for
that.

--- In ARMexpress@yahoogroups.com, "danlee_58" wrote:
>
> I want to use an Armmite board to communicate with another controller via USB,
then communicate with the world via 802.11 b/g WIFI.
>
> Where can I get an inexpensive WIFI board that will interface to Armmite?
>

I interfaced a SuperPro (which was massive over-kill, I just happened to have
one on hand) via RS-232 with an Ubiquity Bullet2 long-range WiFi (capable of
distances to 50 km, depending on antenna, draws about 4 watts at full power,
less than 2 watts at lowest power.)

The Bullet2's serial port is dedicated to it's embedded Linux TTY device; the
way I implemented it was a little off-handed, I executed shell commands and
crunched their output. A considerably more sophisticated approach seemed fairly
readily at hand, by modifying the Bullet2's firmware (open source, free SDK) to
include a fully functional version of netcat (or nc, as it's called on Bullet2.)
That would open-up UDP possibilities.

Out of the box it's possible to setup a bi-directional stream with an external
host, ferried across RS-232 by netcat, but graceful handling of connectivity
drop-outs seemed highly problematic from where I sat.

Without knowing the nature of your needs, nor the role of the interstitial
controller I couldn't say whether this might be a good fit... but maybe worth a
look.


-MM