After needing to find a small delimiter for my data format I started wondering if I could use 0x1E-0x1F?
They are part of the control codes so I thought they might do something weird?
https://en.wikipedia.org/wiki/C0_and_C1_control_codes#Field_separators
depends on your format ? if the format is binary anyway or has binary blobs (ie it needs a program that is able to handle octets outside the printable range) and using those characters does not introduce any ambiguities with the format then go for it . ANSI and related control codes all start with
0x1B