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: https

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: https://www.arduino.cc/en/Main/ArduinoEthernetShield https://www.arduino.cc/en/Main/ArduinoEthernetShield