Skroutz.eu

I bought 2. One for the boiler and one for the solar panel. I installed the ds18b20 temperature sensor from Sonoff on both, along with a 5-meter and two 15-meter extensions respectively. The result is that after 31 degrees Celsius, I don't have any temperature indication. After some research, I found out that the extensions are to blame, despite Sonoff stating that it can handle up to 60m of extension. Anyone who wants to install it should know that it only works properly with the 30cm cable of the ds18b20. The solution I found is to use another sensor and connect the necessary wire, but I haven't tried it yet. I will update when I do. 2 stars with leniency! EDIT: In the end, I bought the new Sonoff WTS01 sensor from an international website, which works perfectly.

WARNING!!! As another user mentioned, the Wifi only recognizes the 2.4ghz frequency and only 802.1.1b. Otherwise, it does not connect.
After two weeks of use, as other users have mentioned, it disconnects daily and you have to remove and reinsert the batteries to reconnect.
EDIT: After one month of using it with a different router, it works fine.