The iPAQ has an auto save battery mode in the WiFi. If you don't use it, it
switches out the WiFi to save battery power. Just go to Start Menu /
Settings / System / Power / Control and you will see WLAN Power save mode.
It defaults to Auto. Set it to OFF.

"Hew Wolff" wrote in message
news:1109193907.806430.157300@l41g2000cwc.googlegr oups.com...
> I'm a software developer, and I'm working on a Macromedia Flash
> application that runs on the HP iPAQ hx4700 Pocket PC (running Windows
> Mobile 2003 Second Edition). It talks to another computer on my LAN
> over a Wi-Fi connection. My problem is that sometimes, especially when
> I leave the iPAQ out of its cradle for an hour or so, the the
> application can no longer communicate with the computer. The wireless
> LED at the upper left is still blue, so it looks OK. But when I go to
> Settings, Connections, iPAQ Wireless, then I see that the Wi-Fi button
> has turned amber. Pressing the Wi-Fi button to make it green again
> simply fixes the problem. However, we do not want the user to do this
> by hand in order to run the application.
>
> So we would like to know: (1) is there some way to prevent the Wi-Fi
> connection from going down; (2) if not, is there some way my
> application can bring it back up, so that I don't have to do it by
> hand?
>
> We have seen this happen on a few different iPAQs on different LANs, so
> it does not seem to be a defective unit or a poor wireless signal. It
> also does not seem to be a low-battery issue, because the battery is in
> the 50%-80% range. It seems possible that the iPAQ is trying to save
> power, but because the blue light is on and the Wi-Fi button is amber
> rather than gray, it looks as if the Wi-Fi is not turned off but rather
> is failing to find the LAN. There are other iPAQ models that give the
> user some control over the "WLAN power save mode", but apparently not
> this one.
>
> We believe that tapping occasionally on the screen prevents the Wi-Fi
> from going down, but we cannot ask our users to do this. Simply using
> the Wi-Fi connection does not help, since the application is actively
> using the connection when the connection goes down. If we could
> programmatically press that Wi-Fi button, so to speak, that might work.
>
> Thank you for any information you may have!
>
> Hew Wolff
> Senior Engineer
> Art & Logic, Inc.
>

> The iPAQ has an auto save battery mode in the WiFi.

Thanks, but recall:

me> There are other iPAQ models that give the
user some control over the "WLAN power save mode", but apparently not
this one.

This particular iPAQ, the hx4700 (which is pretty new and fancy and has
VGA resolution), does not have that feature. The user doesn't get
control over the WLAN power save mode.

Actually, another interesting question is: why would the power save
mode kill the connection? As I understand, it's supposed to reduce
power consumption during times of low traffic, but no packets should be
lost, right?