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Modes
Transparent and API operating modes
The firmware operates in several different modes. Two top-level modes establish how the device
communicates with other devices through its serial interface: Transparent operating mode and API
operating mode.
Transparent operating mode
Devices operate in this mode by default. The device acts as a serial line replacement when it is in
Transparent operating mode. The device queues all UART data it receives through the DIN pin for RF
transmission. When a device receives RF data, it sends the data out through the DOUT pin. You can set
the configuration parameters using the AT Command interface.
API operating mode
API operating mode is an alternative to Transparent mode. API mode is a frame-based protocol that
allows you to direct data on a packet basis. It can be particularly useful in large networks where you
need control over the operation of the radio network or when you need to know which node a data
packet originated from. The device communicates UART data in packets, also known as API frames.
This mode allows for structured communications with serial devices. It is helpful in managing larger
networks and is more appropriate for performing tasks such as collecting data from multiple locations
or controlling multiple devices remotely.
For more information, see
Receive mode
This is the default mode for the XTC RF Module. The device is in Receive mode when it is not
transmitting data. If a destination node receives a valid RF packet, the destination node transfers the
data to its serial transmit buffer.
If a destination node receives a valid RF packet, the destination node transfers the data to its serial
transmit buffer. For the serial interface to report received data on the RF network, that data must
meet the following criteria:
Network ID match
n
Channel match
n
Address match
n
XBee®/XBee-PRO XTend Compatible (XTC) DigiMesh RF Module User Guide
API frame
specifications.
Transparent and API operating modes
22
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