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.
It’s not as complex as the Nanode. It doesn’t have the Arduino header locations, but all the major pins are available at headers. There is a 25L512 chip providing 512 Kbit Serial EEPROM for MAC addresses and logged data if one needs it. The PCB is only 80x50mm in size!
Here is the schematic:
Here is the PCB layout:
All the resources (KiCAD files, libraries, etc) can be downloaded here:Ethnode-V0.9.tar
This morning I got a delivery from Farnell with all the parts.. Busy weekend ahead!