I installed a T2000 and enabled "Local API". It also had an option for "API Time" which I left "off" initially. I tried Discovery with no Custom Parameters and then with Custom Parameters "Key" = "Upstairs", "Value" = "192.168.1.9" and never was able to find the T2000.

I ran the following commands from eisy command prompt.

curl http://192.168.1.9/query/status - {"error":true, "reason":"No Response for Requested URI"}

curl http://192.168.1.9/query/info - {"name":"Upstairs HVAC","mode":0,"state":0,"activestage":0,"fan":0,"fanstate":0,"tempunits":0,"schedule":0,"schedulepart":1,"away":0,"spacetemp":70.0,"heattemp":73.0,"cooltemp":78.0,"hum_setpoint":25,"dehum_setpoint":80,"cooltempmin":35.0,"cooltempmax":99.0,"heattempmin":35.0,"heattempmax":99.0,"setpointdelta":2,"availablemodes":0}

curl http://192.168.1.9/query/sensors - {"sensors": [{"name":"Thermostat","temp":70},{"name":"Space Temp","temp":70}]}

curl http://192.168.1.9/ - {"api_ver": 7, "type": "residential", "model": "T2000", "firmware": "5.65"}

I powered T2000 Off and back On after setting API to On and reran all Discovery tests with same results.

I fear this thermostat or firmware does not support "/query/status". Which from reading other posts, may make this thermostat unusable by "VenstarCT".

Can anyone confirm "query/status" is required or that the T2000 is not supported?

Update and solutions/workarounds to issues.

T2000 was discovered after I put the word "hostname" in the Key field of the custom parameter. I thought I had read somewhere that this field could be anything.

All changes (Mode, Fan mode, Set Points, etc...) via IoX programs don't stick. Meaning they change briefly but after the next poll they revert back to the previous value. Workaround, I'm setting variables to the values I want and calling Network Resources HTTP POSTs to send the changes to the T2000. This works consistently, however the changes are not reflected until after the next poll so I'm putting WAIT times in the programs to ensure a poll has occurred and the new values are present before any further action is taken. This is the same or similar to what SJK describes in his post.