Send:(data request packet)
	68 15 15 68 73 01 00 78 01 06 01 00 0B 01 05 19 0B CA 03 06 1E 0B CA 03 06 03 16
Receive:(confirm)
	E5 
Step 2: 
Send :(request data)
	10 5A 01 00 5B 16 
Receive :(data)
	68 15 15 68 28 01 00 78 01 07 01 00 0B 01 05 19 0B CA 03 06 1E 0B CA 03 06 B9 16

as I mentioned in this thread before, every byte has its own meaning defined by protocol, e.g. length of data, checksum, end flag.