Mark McKillen shared his EthNode – ATMega based Ethernet board in the forum:
Taking inspiration from the good folks at Nanode and an Instructable I saw recently, I’ve come up with “another” AVR based Ethernet board that can be programmed and used like an Arduino.
It’s a simple design based on the ATMega and Microchip’s ENC28J60 Ethernet controller with SPI. Running MQTT on one of these will open up a few options for home automation and remote sensor monitoring.
Via the forum.
This seems like something cool and easy to build, would teach a lot about networking. I think I will make this, do you suppose it would work with a home etched single sided pcb?