I think I get it, even if the OP hasn't filled up my table form post #4 (@ashish_senger Why, by the way?).
ox01c8 is indeed decimal 456 from post #6 and 505146434F322020, once interpreted as hex and broken into bytes, encodes the string "PQFCO2 " (with 2 trailing spaces).
What is unclear, is whether the OP is receiving ASCII strings, but I think that it's the case.