More than one device on the serial pins


I have two sensor boards which give me the data over the serial pins. I have a Duemilanove and want to get the data of both the boards. Since the adresses of the sensors are different, i think there has to be a possibility to get the data of both the boards. could you help me please? :)

Yes, add multiplexing to the output of each device so only one can output on the RX line into the Duemilanove at one time. Can be as simple as 2 AND gates feeding into an OR gate into the RX pin. Arduino controls which one goes thru by controlling the 2nd input pin of the AND gate.

Or, create software serial for each device on its own set of pins.