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API frames
AT command
Frame Type: 0x08
Used to query or set module parameters on the local module. 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 NI parameter value of
the module.
Frame fields
Offset
Example
Description
Start
delimiter
0
0x7E
MSB 1
0x00 LSB 2
0x05
Number of bytes between the length and the
checksum
API frame
identifier
3
0x08
Frame ID
4
0x01
AT
command
MSB 5
0x4E(N)
LSB 6
0x49(I)
Command Name - Two ASCII characters that
identify the AT command
Parameter
value
- -
If present, indicates the requested parameter
value to set the given register. If no characters
present, register is queried.
7
0x5E
0xFF minus the 8 bit sum of bytes from offset
3 to this byte.
Length
API framespecific data
Checksum
AT command-queue parameter value
Frame Type: 0x09
This API type allows module parameters to be queried or set. In contrast to the “AT Command” API
type, new parameter values are queued and not applied until either the “AT Command” (0x08) API
type or the AC (Apply Changes) command is issued. Register queries (reading parameter values) are
returned immediately.
Example: Send a command to change the baud rate (BD) to 115200 baud, but don't apply changes
yet. (Module will continue to operate at the previous baud rate until changes are applied.)
Frame fields
Offset
Example
Description
Start
delimiter
0
0x7E
MSB 1
0x00
LSB 2
0x05
Number of bytes between the length and the
checksum
API frame
identifier
3
0x09
Frame ID
4
0x01
Length
API framespecific
data
XBee Wi-Fi RF Module S6B User Guide
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