> You could always reserve another character (say 254) as an escape
character,
> and then esc/255 means you are sending 255 instead of start of packet, and
> esc/esc means you are sending the value of the escape character.

Even better:

Assign 254 as your escape character.
Then use 254/0 to replace the 255 within a packet
and 254/1 to replace a 254 within a packet

This results in no occurances of the 255 in the body of the packet, and
eliminates the chance of misunderstanding a 254 in the packet.

Bob Ammerman
RAm Systems

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