RS232 comannd with arduino

i am experimenting with new xibo 1.8.1 cms and both windows and android player i am trying to work with rs232 commands i have arduino board connected to com4 on windows and to /dev/bus/usb/002/004 on android but it seems my commands is not working i am using command helpers same as the link here but it is not working.

can any body submit a working connection string example


The command string should be exactly as listed in the documentation - can you enable audit logging on your player to see what it is trying to do?

A valid connection string on Windows would be:


The same connection string on Android would be:


You should be able to get the supported baud/parity/databits/stopbits etc from the Adruino documentation?