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
Generally a bad idea to use in-band signalling like that. They won’t do anything weird but consider what happens if the actual data contains them.