For those that are wanting to use Siri on the Apple Watch to control Vera you can see a demo of it working here: https://youtu.be/T5kibmQiTuM
I used the VeraHomeKitBridge on this thread: http://forum.micasaverde.com/index.php/topic,31716.360.html
, you can get the repo from Hackworth's github here: https://github.com/Hackworth/VeraHomeKitBridge
and just follow the instruction on that page.
I installed it on an old Raspberry Pi B I had laying around, then installed Elgato Eve (free) on my iPhone and linked it to the VeraHomeKitBridge running on my Pi. After that Siri will work on your iPhone and Apple Watch. All the credit goes to Albeebe and Hackworth for their hard work.
Vera Lite (1), Trane Thermostat (1), Yale Deadbolt (1), Foscam FI9821w (4), GE 45602 (1), GE 45603 (2), Intermatic CA600(11)/CA3000(6)/CA5100(4)/CA3500(3), Aeon Labs MicroSmartSwitch (1), Aeon Door/Window Sensors (3), EnvisaLink 3 on DSC 1616 (1), OpenSprinklerPi