I have a scientific instrument which is controlled by an old computer running SCO Unix. I would like to write a Windows application to control the instrument to get rid of the old Unix machine.
I have been able to monitor the serial communication between the Unix PC and the instrument and have determined the setup of the serial port (baud rate, data bits, stop bits, etc.). The initial communication between the PC and the instruments is the PC sending a string of 18 null (00) characters and the instrument responding with another string of null characters.
I then connected my Windows PC directly to the instrument and sent a string of 18 null characters to the instrument (using Eltima Software Serial Port Monitor) but there was no response from the instrument. I have tried all variations of flow control and parity settings yet still can't get a response from the instrument.
Am I missing something here?
