Topic: One other question: LOW level air interface access...

We are looking at a project where we need low level access (unassociated-with-access-point) WiFi packet capture, signal strength monitoring on the packets, and raw packet injection, in a low cost, semi-portable (power disconnected for ~10 minutes) device.

What is the currently specified 802.11 system, and is there an ability to conduct such low level monitoring of the WiFi signal strength?

Re: One other question: LOW level air interface access...

We're currently using an Xterasys XN-3135G USB dongle.  The MAC is a Ralink RT2571W and the transceiver is a Ralink RT2528L.

The source code for the driver is available - we use a patched version of the standard Linux rt73 driver.  You're welcome to look at the driver to see if it can do what you want - the full source code is here.

You'd have to port some Wifi monitoring software and disable the power-down on battery daemon to work as a portable.