To send ASCII values as binary data, you convert to hexadecimal characters of 8 bits (a byte on this OS) and embed these characters into a string.

I am not at a computer where I can lookup the exact format PEP requires but the hex characters are as follows:

\xFE\x2F\x1D\x08

\xFE is hexadecimal for 254
\x2F is hexadecimal for 47
\x1D is hexadecimal for 29
\x08 is hexadecimal padded to 2 characters for 8

Windows Calculator in Scientific mode supports conversions to make your life easier in the future.