WHAT I HAVE: I have an company software that has an option of working with barcode. I also have a cash register machine with a barcode scanner connected to it.
WHAT I WANT: When I register the sale with a _barcode_scanner_ i would like to send that data _to_the_computer_ also. This way the software would remove the item sold from its internal database, not only the cash register.
WHAT I TRIED: I made a serial cable that splits below the barcode scanner and goes to the computer and to the cash register at the same time and it works, partially. What happens is that sometimes the cash register recives the data correctly, while the computer doesn't and sometimes the opposite. Also it happends that BOTH recive the data, but the computer software that reads the serial port blocks (BC-Wedge; to send serial data to keyboard buffer).
It is possible to download the sales data from the cash register, format it and then import to the software and thus have the database inside the computer and the cash register sync-ed, but this is lot of work and i would need a programmer to do this. Also i have to wait until the end of the day to send the data to the computer.
THE SPLITTER:
On 2 ends i have DB9 female connectors, and from one i have a split wire going to 1 male connector (for the barcode reader).
Why is this happening? I keep hearing a buzzing sound from the barcode scanner when i try to scan (Metrologic Pulsar MS6220). Is it because the both serial ports (on computer and cashregister are sending some data back? Can I fix that (remove the CTS wire)?