> "I wish there was something ESP8266 like with Ethernet"
Perhaps you'll find this useful:
http://hackaday.com/2016/04/01/ethernet-controller-discovere...
You can also do real Ethernet with a teensy: https://www.pjrc.com/teensy/td_libs_Ethernet.html
Thanks for that, I like the compactness of the Teensy solution. If we're going with shields it's probably worth mentioning that the Arduino also has one:
(and WLAN spectrum is quite cramped here, and part of me wants to isolate everything into nice separate networks, just to be sure)