I’m pretty sure you can do the above. I don’t have any experience with CORE, but it’s a very powerful program created within the community. If you would like to post to a thread for help developing CORE pistons I’ll bet someone there can tell you just how to accomplish this. There is another IOS program, free to create one rule, called SmartRules that could handle this task as well.
As per the above, you should be able to do it ok.
I would think about using webCoRE.
This supersedes CoRE and you can use your pc to build the pistons (rules) you will need.
If someone has probably already done this you mau be able to import their piston.
Search webCoRE and all you need to know will appear.
CoRE and webCoRE are both powerful toos for ST. Most things your mind can come up with, you can do it in either. webCoRE is still in Beta but you might as well start with it to avoid 2 learning curves as webCoRE is the future.
You may not be able to do it all with Z wave, in particular, the projector input will probably require a different device ( typically Logitech Harmony hub, but there are some other choices as well), but assuming that each individual task can be accomplished through SmartThings, you can, as others have already mentioned, build a “piston” in Core that can trigger them all together.
I haven’t looked at Core or WebCore, but this sounds like things you can do from ST’s Automation/Scenes/etc… as a simpler version, I have an Automation called “Nightlight” that takes the three connected light bulbs I have in the bedroom, turns two of them off and sets the third one to the minimum dimness.
That’s technically three devices I’m doing two different things with.
Some things may be a challenge with ST in general, but not so much the software as the hardware available.
If your projector is HDMI-CEC compliant, that could possibly turn it on and switch to the correct input (Chromecast will do this on proper HDMI-CEC setups).
Only other thing I’m not sure of is the opening projector screen, but I’m wondering if a blinds control could be adapted to it, if someting doesn’t already exist.
All the use cases you mentioned, except the projector input switching and screen opening, can be automated via smartthings.
The projector screen opening could be done if you use a generic blinds opening motor to move the actual screen, that would then be controlled via an additional shutter module with relays.
As mentioned before, CoRE is heavily recommended from my side also, since it covers all capabilities (ST doesn’t allow all capability control in all cases via it’s Routines for some reason), and even custom attributes used in various device handlers. I find it to be the best “automation engine” on all z-wave controllers i’ve ever tried (and i’ve tried over 6 various brands). If only ST made a system like CoRE inbuilt to the ST hub…