I figured using DS18b20 one wire temp probes would allow me to monitor 2 or 3 temperatures all at once sending the results to my phone or iPad via wifi. I could be in the house or even the other side of the world and see what temp my HLT or fermenting cabinet was. I could also switch on or off heating elements as required remotely. With a bit more imagination I could open up valves or switch on pumps. My system also has 2 flow sensors linked in to measure volume going into my MT and boiler. I also use it to measure volume going into my FV. My system is all set up for full automation. I just need to figure out the computer code, which is beyond my tiny brain cells at the moment.

So has anyone used a ESP8266 and what did you use it for?