I currently use the Arduino Yun but am testing the Arduino Mega, Yun mini and Uno Wifi.
https://store.arduino.cc/usa/arduino-yun
This is my brew setup,
With Solid State Relay
Download the Fritzing Diagram here, https://github.com/BrewBench/monitor
The Arduino Yún is now discontinued but you can use this replacement called Seeeduino Cloud
Just finished a waterproof prototype!
It's Back! Arduino Yún Rev 2 is set to be on sale April 23, 2018!
https://store.arduino.cc/usa/arduino-yun-rev-2
https://blog.arduino.cc/2018/03/29/arduino-yun-rev-2-is-here/
Hey Andrew, I really enjoyed your project. Have you tried using the arduino uno with network card? I would love to use your brewing automation ..
Sorry for writing mistakes, my language is Portuguese .. I'm from Brazil.
Ronald Yea you can use a Dragino Yun Shield with an Uno.