XBee®/XBee‐PRO® ZB SMT RF Modules
AT Command Response
Frame Type: 0x88
In response to an AT Command message, the module will send an AT Command Response message. Some
commands will send back multiple frames (for example, the ND (Node Discover) command).
Frame Fields
Offset Example
0 0x7E
Description
Start Delimiter
Length
MSB 1 0x00
LSB 2 0x05
3 0x88
Number of bytes between the length and the checksum
Frame Type
A
P
I
Identifies the serial port data frame being reported. Note:
If Frame ID = 0 in AT Command Mode, no AT Command
Response will be given.
Frame ID
4 0x01
5 ‘B’ = 0x42
6 ‘D’ = 0x44
Command Name - Two ASCII characters that identify the
AT Command.
P
a
c
k
e
t
AT Command
Frame-specific Data
0 = OK
1 = ERROR
2 = Invalid Command
3 = Invalid Parameter
4 = Tx Failure
Command Status
Command Data
7 0x00
Register data in binary format. If the register was set,
then this field is not returned, as in this example.
Checksum
8 0xF0
0xFF - the 8 bit sum of bytes from offset 3 to this byte.
Example: Suppose the BD parameter is changed on the local device with a frame ID of 0x01. If successful
(parameter was valid), the above response would be received.
Modem Status
Frame Type: (0x8A)
RF module status messages are sent from the module in response to specific conditions.
Example: The following API frame is returned when an API coordinator forms a network.
Frame Fields
Offset Example
0 0x7E
Description
Start Delimiter
Length
MSB 1 0x00
LSB 2 0x02
3 0x8A
Number of bytes between the length and the checksum
Frame Type
Status
0 = Hardware reset
1 = Watchdog timer reset
2 =Joined network (routers and end devices)
3 =Disassociated
6 =Coordinator started
A
P
I
Frame-specific Data
4 0x06
7 = Network security key was updated
0x0D = Voltage supply limit exceeded (PRO only)
P
a
c
k
e
t
0x11 = Modem configuration changed while join in
progress
0x80+ = Ember ZigBee stack error
Checksum
5 0x6F
0xFF - the 8 bit sum of bytes from offset 3 to this byte.
Note: New modem status codes may be added in future firmware releases.
© 2010 Digi International, Inc.
107
DCD [ DIGITAL CORE DESIGN ]
