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XBee® Wi-Fi RF Modules

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

API Packet

Start

Delimiter

0 0x7E

Length

MSB 1 0x00

Number of bytes between the length and the checksum

LSB 2 0x05

API Frame

Specific Data

API Frame

Identifier

3 0x09

Frame ID 4 0x01

AT Command

MSB 5 0x42 (B)

Command Name - Two ASCII characters that identify the

AT command

LSB 6 0x44 (D)

Parameter Value 7 0x07

If present, indicates the requested parameter value to set

the given register. If no characters present, register is

queried.

Checksum 8 0x68

0xFF minus the 8 bit sum of bytes from offset 3 to this

byte.

Note: In this example, the parameter could have been sent as a zero-padded 2-byte or

4-byte value.

Digi XBee Manual

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