Long time ago I've started my personal home automation project. The first building blocks where some small PCBs for RS485 interfacing and temperature sensing. Later I've started outlining a controller architecture for my home automation projects.
Currently my infastructure looks like this:
From top to bottom:
- An Arduino Mega256 with Ethernet-Shield. The RS485 interface is assembled on a small breadboard using the LTC1487 line driver. The LCD is attached via small I2C interface to the arduino.
- An Seeeduino 328P with an attached experimental shield with an identical RS485 interface.
Read on about the next steps here: