Question about the possibility to use a sonoff instead of a relais about wifi-sous-vide HOT 1 OPEN

There are already a few wifi sous vide programs out there that use MQTT. Personally, and I don't know the author, I think the beauty of this particular project is that it doesn't require an MQTT broker on the network, it can all be handled by the ESP8266.

That being said, It looks like, with a few minor changes, this project could run on a Sonoff Basic. I have it running on one with the DS18B20 connected to a header soldered to the programming pins. Next to the 3.3v, Rx, Tx, and GND pins is GPIO 14, which you can use as the data line for the sensor. This makes a nice self-contained device that shouldn't even require a wifi network around to use. I noticed in his example code for the PID library, you can even get an LED to light when the system is at the setpoint.

from wifi-sous-vide.