Digi International Inc XBEEPRO2 Manual Do Utilizador

XBee®/XBee‐PRO® ZB RF Modules

127

Frame Fields

Offset Example

Description

Start Delimiter

0 0x7E

Length

MSB 1 0x00

Number of bytes between the length and the checksum

Frame-specific

Data

LSB 2 0x19

Frame Type

3 0x11

Frame ID

4 0x01

Identifies the UART data frame for the host to correlate

with a subsequent transmit status. If set to 0, no transmit

status frame will be sent out the UART.

64-bit

Destination
Address

MSB 5 0x00

64-bit address of the destination device (big endian byte

order). For unicast transmissions, set to the 64-bit

address of the destination device, or to

0x0000000000000000 to send a unicast to the

coordinator. Set to 0x000000000000FFFF for broadcast.

6 0x13
7 0xA2
8 0x00
9 0x40

10 0x40

11 0x12

12 0x34

16-bit

Destination
Network

Address

MSB 13 0x56

16-bit address of the destination device (big endian byte

order). Set to 0xFFFE for broadcast, or if the 16-bit

address is unknown.

LSB 14 0x78

Source

Endpoint

15 0x41

Set to the source endpoint on the sending device. (0x41

arbitrarily selected).

Destination

Endpoint

16 0x42

Set to the destination endpoint on the remote device.

(0x42 arbitrarily selected)

Cluster ID

MSB 17 0x07

Set to the cluster ID that corresponds to the ZCL

command being sent.
0x0701 = Demand response and load control cluster ID

LSB 18 0x01

Profile ID

MSB 19 0x01

Set to the profile ID supported on the device.
0x0109 = Smart Energy profile ID.

LSB 20 0x09

Broadcast

Radius

21 0x00

Sets the maximum number of hops a broadcast

transmission can traverse. If set to 0, the transmission

radius will be set to the network maximum hops value.

Transmit

Options

22 0x00

All bits must be set to 0.

Data Payload

ZCL Frame

Header

Frame Control

23 0x09

Bitfield that defines the command type and other relevant

information in the ZCL command. See the ZCL

specification for details.

Transaction

Sequence

Number

24 0x01

A sequence number used to correlate a ZCL command

with a ZCL response. (The hardware version response

will include this byte as a sequence number in the

response.) The value 0x01 was arbitrarily selected.

25 0x00

Since the frame control "frame type" bits are 01, this byte

specifies a cluster-specific command. Command ID 0x00

in the Demand Response and Load Control cluster is a

Load Control Event command. (See Smart Energy

specification.)