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RS232 WITH hydreon (rain gauge)

Hi all,(am a new user here,so if there is any mistake pls do tell)

anyone of you all know how to decipher this meaning?

"

Frames start with the transmission of an ASCII 's' character.   
Each data byte is then sent as ASCII-Hex over , meaning that the upper nibble of the byte is
converted to a single ACII character, 0-9 or a-f.  The lower nibble is then similarly transmitted.
For example, if the data byte is a decimal value 108, this would be hex 6C.  This is transmitted
as an ASCII “6” followed by ACII “c”.  (Yes, lower case is used.)
There is no end-of-frame character.
's'
Data Byte 0 upper nibble
Data Byte 0 lower nibble
Data Byte 1 upper nibble
...
Data Byte 9 lower nibble

"
newbie here
if anyone could please kindly assist me ?? appreciate it alot & thanks a million!


link*  hydreon.com/.../rg-11_using_rs232.pdf