Im currently trying to get my Keyboards software to work on linux, but since that won‘t be a thing, like ever, im trying to Reverse engineer the software in order to copy the get and set requests the Software sends over USB and send them over a Python Script using libUSB, so I can control it independent of OS
So I set up my Wireshark with a USB snooper and started using the software
Only problem: Since I have no idea how a Keyboard usually communicates, so I have no idea what to look for. Can someone recommend me some already reverse engeneered FOSS Keyboard software as an example? (Like the wooting software, if its even OSS)
Unless the vendor is rolling something super custom, for the communication TO the keyboard, it should use USB HID.
Start Wireshark, filter for hid, connect the KB and the first message should be a HID descriptor of the KB, look for Output Reports (it’s meant from the POV of the usb master) or Feature Reports.
Though, this will probably not yield much insight - vendors love to do the easy thing, reserve opaque 32x8 bytes as a “downlink” Output communication in the Vendor Usage Page and stuff their own protocol/encoding in there.
On linux I can recommend hid-tools for working with this, in windows I believe your only solution is Wireshark.
https://www.marcusfolkesson.se/blog/hid-report-descriptors/
Happy Hacking!
E: About the already reversedsoftware, for logitech (and more) stuff, there is piper but you will want to look into the underlying daemon libratbag, there is also solaar