Temperature from Honeywell round thermostat not visible in blockly

[aquaplanning]

Newbie alert!

What I have:
Honeywell connected round with RFG100 gateway. Can see current room temperature in the temperature tab. Aegon-Z-wave Stick, windows.

What I want:
Operate a switch depending on temperature levels, to be done in blockly.

But:
In blockly, no temperature sensor from the Honeywell round is visible.

Tried:
To make a dummy temperature sensor, but now stuck. Can see SubTypeLaCrosse TX3 in device list. Dummy shows up in Blockly temperature device list but don't know how to get dummy to read current room temperature from Honeywell device.