[QUOTE]I think I would prefer the latter so if I use the STCI input I still need to find a valid output on the 211HV that sends a pulse when arming but not sure that exists.[/QUOTE]
The 211 has a Factory Alarm Disarm, but not an ARM. That would be what you need.
EDIT/ADD to the post I can no longer edit:
I did a 211HV install to one of my personal cars few months ago. I ran, but didn't hook up the horn wire at the time because it didn't seem to do anything except during programming. I was reviewing install notes for the 211HV and noticed that the menu and programming structure is identical to the 3100 I have in my Daily Driver that I installed many years ago, and has been flawless in operation. I know that in the DD, it will only sound the horn with locking if I push AUX, then lock or unlock.
I just got back in from testing the horn output on the 211HV car, and sure enough it sounds after AUX then lock or unlock. So I hooked it up. I almost never use the horn-honk unless I really want to know that it locked, and I can't see the light flash clearly or in direct sight. This car isn't driven very frequently. A couple times a month, tops, so no biggie either way, but I like to understand things.
I also went and tried 'your' push lock and unlock a second time for horn honk, and I get the honk on lock, but not unlock because I am using driver door priority, and the passenger unlocks on the second push of unlock. I pushed unlock three times, and no honk. I didn't get a panic honk either (I do with the 3100), but I may not have pushed it long enough. I don't want to annoy the neighbor too badly, so I'll try that again when I'm not in my back yard.
So I learned something here too, and improved one of my installs because of it.
I began to use DEI products in 2008. One of my gripes at the time was that the Japanese to English translations in the instructions and manuals is "clunky", and some things were not clear. Difficult to understand and work with. In the ensuing 12+ years, things haven't improved much, and there are still errors and omissions. Experience is everything. And everyone continues to learn.
Thanks.