User Manual

XBee®/XBee‐PRO®ZBRFModules
©2011DigiInternational,Inc. 102
Source Routing
The following image shows the API frame exchanges that take place at the UART when sending a source routed
transmission.
Supporting the API
Applications that support the API should make provisions to deal with new API frames that may be introduced in
future releases. For example, a section of code on a host microprocessor that handles received serial API frames
(sent out the module's DOUT pin) might look like this:
API Frames
The following sections illustrate the types of frames encountered while using the API.
AT Command
Frame Type: 0x08
Used to query or set module parameters on the local device. This API command applies changes after executing
the command. (Changes made to module parameters take effect once changes are applied.) The API example
below illustrates an API frame when modifying the NJ parameter value of the module
void XBee
_
HandleRxAPIFrame
(
_
apiFrameUnion
*
papiFrame
)
{
switch(papiFrame->api_id){
case RX_RF_DATA_FRAME:
//process received RF data frame
break;
case RX_IO_SAMPLE_FRAME:
//process IO sample frame
break;
case NODE_IDENTIFICATION_FRAME:
//process node identification frame
break;
default:
//Discard any other API frame types that are not being used
break;
}
}