A custom designed temperature sensor

This project has required the design and development of several custom sensors.  This is the first one to have been built.  It uses 5 one-wire temperature sensors attached to an AVR.  The AVR then runs code to interface with the sensors.  In order to connect to the main sensor node the AVR uses RS-485.  This means that it can be away from the main node, and because of the multi-drop nature of RS-485 multiple such devices could be attached.  The other sensor nodes also interface using RS-485 so each node could have different types of remote sensor attached.