Joe designed a 802.15.4 network analyzer for Linux with the STM32W-RFCKIT , by reverse engineering the Windows only closed-source application note AN3406.
Summary: The STM32W-RFCKIT together with application note AN3406 is a nice low cost solution for diagnosing problems on a 802.15.4 (ZigBee, MiWi etc) network. Unfortunately the solution is Windows only and closed source. In this article I have reverse engineered the firmware protocol so that a similar solution can be implemented in Linux, Mac OSX and other platforms. I’ve also written a first draft of this software for Linux.
Via the comments.