In 2016 we added logo printing to the 1510 printer for Rondo, based on the latest ESI printer protocol spec, because we have no printers to test with. Now in 2020 when they try to use it, it does not work.

We have discovered today, the latest ESI protocol document from VideoJet has an error in it. Yet somehow we got it correct when logo printing was added for the 1520 printer.

The [1B][84][38] command required an 8 character file name. It had to be 8 characters. This is the command we were attempting to use but the latest ESI protocol document actually documents the [1B][84][43] command, which has an argument to specify the file name length. Instead of adding the [1B][84][43] command, someone edited the [1B][84][38] command in the document instead.

Both the 1510 and 1520 drivers are now using the correct [1B][84][43] command.