Jay, that was a great suggestion... I still got "access denied" initially, but I tried some other things and have had success through the goprism reflector. I can now turn toggle my greatroom ceiling lights on and off using notifications on my iPhone, iPad, and also my Apple Watch. I'm very excited about this.
What I did was to target a light fixture rather than the gas fireplace's IOLinc, going on the assumption that perhaps an I/O link doesn't respond to ...
https://(myName).indigodomo.net/devices/Greatroom - Fireplace?toggle=1&_method=put.
When I changed this to...
https://(myName).indigodomo.net/devices/Greatroom - Ceiling Lights?toggle=1&_method=put.
... things started working. (the ceiling lights are on a switchLinc).
Where can I find a list of commands that various devices will respond to... not that I can turn lights on and off (toggle) I'd like to be able to do other stuff... is there a syntax manual someplace you can link me too? For example, my gas fireplace on/off control happens via IOLinc. Other commands may include setting to on, setting to off, setting to a given brightness, raising and lowering my home theater screen (I'm using EZIO8SA for that).
The best thing is that I did this using nothing but my iPhone while home is currently 750 miles away.
TIA