Testing barcode:
FN1 substitution string setting: The FN1 character (0x1D) in an UCC/EAN128 barcode, or a Code 128
barcode, or a GS1 DataBar barcode can be substituted with a defined string.
Single character C1/C2 replacement: By setting, a defined character in the data string can be replaced
by another defined character. The C1 and C2 replacement are applied simultaneously.
Example: Replace all the “A” character in a data string to be “B” character.