This is an emulation of the WH2600 weatherstation device.
The receiver box receives the 868 MHz signal from the outdoor station and the indoor transmitter. The build-in web server provides the measurements on the web page livedata.htm. This page is emulated here. The receiver box has the ability to push data (using http) to a server or weather cloud service. This feature is not used in this setup.
The indoor transmitter has been modified to measure soil temperature. Therefore the onboard NTC was replaced by a waterproof PT500 sensor probe and the readings corrected with a fitted polynomial.