We're planning on using Arduino for a telemetry system. The input data comes from RS232, and we'd like to communicate with another Arduino via XBee. We bought already the XBee shields as well as the Arduinos. The question is: would a RS232 shield for Arduino use the same ports as XBee? Because they should be working at the same time...
One more question, what if we use CAN instead of RS232? Which CAN-shield (if any) would you recommend so that we have no problems with our Xbee shield? Thanks!