All,
With support from Apple, I have posted an initial draft of an IPP registration document that documents the Wi-Fi configuration attributes and values that have been used by AirPrint since 2017. The goal is to have a publicly available specification so that more operating systems can support Wi-Fi setup over USB.
Available here:
https://ftp.pwg.org/pub/pwg/ipp/wd/wd-ippwifi10-20240102.docxhttps://ftp.pwg.org/pub/pwg/ipp/wd/wd-ippwifi10-20240102.pdf
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Michael Sweet