Digi International Inc XBEEPRO2 Manual Do Utilizador
XBee®/XBee‐PRO® ZB RF Modules
© 2011 Digi International, Inc.
102
API UART Exchanges
AT Commands
The following image shows the API frame exchange that takes place at the UART when sending an AT command
request to read or set a module parameter. The response can be disabled by setting the frame ID to 0 in the
request.
request to read or set a module parameter. The response can be disabled by setting the frame ID to 0 in the
request.
Transmitting and Receiving RF Data
The following image shows the API exchanges that take place at the UART when sending RF data to another
device. The transmit status frame is always sent at the end of a data transmission unless the frame ID is set to
0 in the transmit request. If the packet cannot be delivered to the destination, the transmit status frame will
indicate the cause of failure. The received data frame (0x90 or 0x91) is set by the AP command.
device. The transmit status frame is always sent at the end of a data transmission unless the frame ID is set to
0 in the transmit request. If the packet cannot be delivered to the destination, the transmit status frame will
indicate the cause of failure. The received data frame (0x90 or 0x91) is set by the AP command.
Remote AT Commands
The following image shows the API frame exchanges that take place at the UART when sending a remote AT
command. A remote command response frame is not sent out the UART if the remote device does not receive
the remote command.
command. A remote command response frame is not sent out the UART if the remote device does not receive
the remote command.