Digi International Inc XBEEPRO2 Manual Do Utilizador

Frame Type: 0x21

This frame creates a source route in the module. A source route specifies the complete route a packet should 
traverse to get from source to destination. Source routing should be used with many-to-one routing for best 
results.

Note: Both the 64-bit and 16-bit destination addresses are required when creating a source route. These are 
obtained when a Route Record Indicator (0xA1) frame is received. 

Example: Intermediate hop addresses must be ordered starting with the neighbor of the 
destination, and working closer to the source. For example, suppose a route is found between A 
and E as shown below.

  A ' B ' C ' D ' E

If device E has the 64-bit and 16-bit addresses of 0x0013A200 40401122 and 0x3344, and if devices B, C, and 
D have the following 16-bit addresses:

B = 0xAABB

C = 0xCCDD

D = 0xEEFF

The example above shows how to send the Create Source Route frame to establish a source route between A 
and E.

0 0x7E

MSB 1 0x00

Number of bytes between the length and the checksum

LSB 2 0x14

3 0x21

4 0x00

The Frame ID should always be set to 0.

MSB 5 0x00

Set to the 64-bit address of the destination device. The 

following addresses are also supported:
0x0000000000000000 - Reserved 64-bit address for the 

coordinator
0x000000000000FFFF - Broadcast address

6 0x13
7 0xA2
8 0x00
9 0x40

10 0x40

11 0x11

LSB 12 0x22

MSB 13 0x33

Set to the 16-bit address of the destination device, if 

known. Set to 0xFFFE if the address is unknown, or if 

sending a broadcast.

LSB 14 0x44

15 0x00

Set to 0.

16 0x03

The number of addresses in the
source route (excluding source
and destination).

17 0xEE

(neighbor of
destination)

18 0xFF

19 0xCC

Address of intermediate hop

20 0xDD

21 0xAA

 (neighbor of source)

22 0xBB

23 0x01

0xFF - the 8 bit sum of bytes from offset 3 to this byte.