Digi XBee SX 868 - Transmit and Receive RF Data; Remote at Commands

Operate in API mode API serial exchanges
XBee® SX 868 RF Module User Guide
165
Transmit and receive RF data
The following image shows the API exchanges that take place at the serial interface 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 TX request. If the packet cannot be delivered to the destination,
the transmit status frame indicates the cause of failure. The received data frame type (standard 0x90,
or explicit 0x91) is set by the AP command.
Remote AT commands
The following image shows the API frame exchanges that take place at the serial interface when
sending a remote AT command. A remote command response frame is not sent out the serial interface
if the remote device does not receive the remote command.