1. Do I need to change the modes of the Xbee to make this work? To clarify, do I need to change from AT or point to point mode to API mode?
2. Do I need to format each set of data with specific termination characters. For example, the Arduino knows when altitude data is being sent because it is formatted with these start and end characters '<' '>'. Then the GPS coordinates could be formatted with '\' '/' start and end characters. This would be utilized for every type of data being sent. Would this work? Are there better alternatives? If so what are they?
I am a recent Mechanical Engineering graduate with little coding experience for this type of application.