Se (Source Endpoint); De (Destination Endpoint); Ci (Cluster Id); To (Transmit Options) - Digi XBee User Manual

AT commands
Default
0x20 (an ASCII space character)

SE (Source Endpoint)

Sets or displays the application layer source endpoint value. The value is used as the source endpoint
for all data transmissions. SE is only used in Transparent mode. The default value (0xE8) is the Digi
data endpoint.
Parameter range
0 - 0xFF
Default
0xE8

DE (Destination Endpoint)

Sets or displays the application layer destination ID value. The value is used as the destination
endpoint for all data transmissions. The default value (0xE8) is the Digi data endpoint.
Parameter range
0 - 0xFF
Default
0xE8

CI (Cluster ID)

XBee/XBee-PRO ZigBee RF Module
Sets or reads the application layer ID value. Use this value as the cluster ID for all data transmissions.
CI is only used in transparent mode.
Parameter range
0 - 0xFFFF
Default
0x11 (Transparent data cluster ID)

TO (Transmit Options)

The bitfield that configures the transmit options for Transparent mode.
Sets or reads the ZigBee application layer source transmit options. Use this value as the transmit
options for all data transmissions in transparent mode.
Parameter range
0 - 0xFF
Bit field:
Unused bits must be set to 0. These bits may be logically ORed together:
XBee/XBee-PRO® S2C ZigBee® RF Module
Addressing commands
223