I want to communicate with a LanBox and I have to send values in hexadecimal, but represented by their ASCII values. So, for example 0 is 00 in hexadecimal, and it's sent as 48 48. 255 is FF and is sent as 70 70.

The only thing I can think of is [makefilename], but it seems that it's only helpful for converting a decimal number to hexadecimal. How can I go about the rest, splitting the two characters and finding their ASCII values?