I own a Rika Filo pellet stove, which I like, but it is on the expensive side of the market and the Wi-Fi module to remote control it was a no-go. This article describes the way I reverse-engineered the radio protocol.
As it is my sole heating system and winter is coming, I wanted a non invasive approach to avoid breaking anything, so I hooked up a logic analyzer to record the commands sent by the micro-controller to the radio chip, which helped me to learn the RF parameters + actual payload.