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default the modules come pre-configured to connect at 9600baud/s, so if the Xbee was just bought, use that.
Serial Settings
The important settings here are the Baud Rate which must be set to 115200 to work with the PicPilot, the stop bit and parity settings. In addition, Api Enable should be set to 1 (API Mode without escapes), and the Api Options should be set to 0 (NOT explicit Rx indicator). This is all required for proper communication with the PicPilot. The other fields are not relevant.
Addressing Settings
The important parameters here are the Transmit Options which should be set to 0x40 for Point to Point/Multipoint (we're not doing Repeater or DigiMesh). In addition the Cluster ID should be set to 0x11.
You may also wish to set a device friendly Node Identifier name, such as 'Plane' or 'GC' to tell apart
the nodes when someone else connects to them. The Destination Address fields are configured on the
PicPilot, and are not important for the Xbee connected to the aircraft.
MAC/Physical Layer Settings
The important settings here are the Preamble ID and Network ID. For two nodes to communicate with each other, these id's must match. The other important property is the TX Power Level, which should
be set to 4 (Highest at 24dBm) for maximum range. Note that by default, the channel mask is set to disable channel 19 (recommended by Digi).
Network Settings
Important setting here is the Routing/Messaging Mode, which should be set to 2 (Non-routing module).