Protocol debugging of the wireless Vaillant calormatic 340f boiler / central heating controller (868MHz). Results are documented in our Wiki and implemented in rtl433 (and rflink)
Scanning protocol debugging of KONIKA Minolta magicolor 1690MF multifunction scanner/color laser printer => Basis for implementation of sane driver for magicolor devices.
Protocol debugging and configuration utility for HP 2101w wireless USB print server (USB forwarder). Also implementation of a configuration utility for the VAP11g wireless bridge (uses the same configuration protocol, but over Ethernet).