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JohnS
Guru

Joined: 18/11/2011
Location: United Kingdom
Posts: 4332
Posted: 05:28pm 28 Oct 2025      

Some comms protocols are along those lines (*) but I think seeing an Esc as an Esc was to detect that the next character didn't arrive in time (or was not a valid char for any recognised esc sequence).

(*) e.g. DLE STX for the start of a packet, DLE ETX for the end, and DLE DLE to mean one DLE - it's known as byte stuffing

John