@andiadm
> BTW, with all of these WiFi gadgets, you can only have 1 active serial session at a time, reason is,
> that the device is made to listen to one source of commands only.
Yes, that is true when operating in the so-called 'USART' mode, which is designed to emulate an end-to-end serial connection, as you have described.
The frustrating aspect of all this is that these little XBee gadgets are capable of supporting much more: low-power, self-organizing, ad-hoc networks of sensors:
http://en.wikipedia.org/wiki/ZigBeeSo, with appropriate software in place, it should be possible to create a network of weather and other kinds of low-power sensors which can inserted in a 'plug and play' manner for reporting and exchanging their data with other sensors and network monitors.
To conserve power, the data rates are somewhat capped, at around 250kbps I believe. So I view these WiFi/XBee units as somewhat of a hybrid "bridge" to faster tcp/ip networks (for processing video and other high-bandwidth signals etc).
This is all very appealing to me, but I'm still in the learning stage and haven't quite figured out how to get these ideas working with the Davis boxes.