This is not a direct answer to your question, but I thought this might be helpful for you and a number of folks who might not be aware that it exists. Since 2016ish, all NEC projector and pro display models (to my knowledge) have utilized NEC's Common ASCII Control Command Protocol in parallel to their standard hex protocol. It is very simple and quite human readable, so it may be worth a look to see if it helps you get the job done sooner.
