and here is another one:
https://ex-store.de/ESP8266-WiFi-Relay-V3
As I mentioned before @ your own risk! These are DIY items, but for me in the end better and easier than when I whould have done it myself.
As long as ther is the I2C bus available and some gpio pins its fine. The ESP is easyly available and you can solder it directly if necessary. My module arrived but I had no time to test it… My environment sensor still sits on an breadboard too. Will switch to an esp-07 with an external antenna to make it more reliable! I found out, that’s the main problem with the ESP - it is power hungy - I have not found a solution running really wireless. Even deep sleep will not help when you have to wait more than 1 second (can be more than 10) until your light goes on. For temperature sensors this might work. Using a 5 W power supply with less than 90% efficiency 24/7 to save a little bit of power on your LED lights:( Compared to 868mhz items which can run for more than a year and latency time where openHAB is the only bottleneck.
Will give you an Update