Field 				Length
Destination ID 			2 bytes
Active message handler 	1 byte
Group ID 			1 byte
Data length 			1 byte
Data 				29 bytes (max)
CRC 				2 bytes
1    2   3    4   5    6  7   8   9   10  11 12 13 14 15 16 17 18 19  20 21 22 23 24
7E 42 7D 5E 00 11 33 0C 00 00 00 00 00 00 00 00 E5 00 7D 5E 00 64 9F 7E 
ro  = 7e 42  destination of the packet (2 bytes) => forward packet to the local data uart
h0 = 7D id of the message handler that needs to be invoked on the packet
N = 5E no of hops left add more details
Hf = 00 destination of the packet
R1 = 11 intermediate hops 
R2 33
R3 0c
R4 00
S 00 source of the packet (sending node i.e root beacon)
Data  00 00 vcommhead
 00 00 00  MHsenderheader
 00 E5 00 7D originated message/forwarded message
5E  type
00 64  reading
9F 7E  parent address 

7E 00 0A 7D 01 00 72 EE 01 00 5D 03 5A 03 5A 03 59 03 53 03 4B 03 4B 03 58 03 61 03 61 03 00 00 00 00 76 9B

This structure is mapped onto the data portion of the packet. This starts at byte 5 of the packet. Remember that bytes 1 and 2 are the destination address 0x007E here. Bytes 3 is the handler ID 0xA, and byte 4 is the group ID, 0x7D.

7E 42  destination address
7D  active message handler ID
5E  group ID
 00 data length
11 
 33	
 0C 00
 00 00
 00 00
 00 00
 00 E5
 00 7D
 5E 00
 64 9F
 7E