Send a notification from Arduino to OpenHAB

Hi there all,
I have a greenhouse in my garden and I want to transmit some data
via RF (or wifi) from my grennhouse Arduino
to the OpenHUB… like trmp, humidity etc…

Can anybody please tell me witch is the simplest way ?
For now I only have some wifi SonOff that it’s work verry god.

Thanks in advance
Denis

Sonoffs will work with the tasmota firmware on them and additional sensors.

See:

Beware of the range of Wifi though. Yopu may need a range extender to reach your green house