I have asked question recently in Arduino Stack exchange but I forgot to specify the problem clearly. I thought it is a problem with the Arduino's
serial.read(). Seems like the question belongs to Super User or Electrical stack exchange. What should I do?
I was going to delete the question but the question has answers now but the answers did not help. I see this question more into Serial communication. Also I have seen many users having the kind of same problem in reddit and Arduino forums.
The question may not have a answer at all, it may be old devices (Versastat II) are not compatible with modern devices. I have fully edited the question after the two answers, which is bad indeed, afterwards added the full problem scenario..
Should I delete the question and repost? Help!