Sonoff Th16 with tempertature probe

[nodyalc21]

Hello I am quite new to this and would like some advice please .
I have Domoticz running on a Raspberry Pi and I control all my lights with Sonoff basics flashed with Tasmota and this has all worked well for the last 2 years. But now I would like to control my green house heating with Domoticz using a Sonoff TH16 and a temperature probe. I have flashed the Sonoff with Tasmota and this along with my probe are now in Domoticz. But how do I set it up so the sonoff switch operates on and of at set temperatures.
Any advice would be appreciated .