Sams4s RS232 protocol

I’ve just launched my new project to be able to talk to and program Sams4s cash registers using open source tools, the code can be found at https://github.com/robincornelius/ECRComms it is not finished but what of it there is currently works with an ER-230 and in theory the backup/download should work with many other models. The actual editing will be model/version dependent and I will need help from others to make it work with more than just the two models I have here (the ER230 and the ER380M).

I’ve also started a documentation project that can be found here this is the documentation of the protocol and file format as I work it out.