I lose my program (sketch) source. Is there adecompilation or dissassemble tool to recover my original sketch.
Denis
No. You might be able to get the assembly code, but it is impossible to reconstruct the source from that.
It is not possible to (re)generate your original sketch from the flash content, unless your code is trivial.
Rewriting code often creates better code and it take way less time than writing the first version.