Robust Serial Communication

[Md_Aslam]

I have a device which communicates via RS-232 Port, there are some commands for reading and writing. To make the communication automatic I am using Python(PySerial Library) language, But I am facing a little problem while working, that is, initially everything works fine but after some time I get consistent error of communication failure. I searched a lot on the internet but did not found any relevant solution for that. Programming wise everything is correct from my side, maybe there are some issue with hardware I am not able to figure out.
So please help me to make a robust serial communication system.
Any SOP(Standard Operating Procedure) regarding serial communication programming would be highly appreciated.

PS: I am using USB to RS-232 Cable to connect my RS-232 device and PC.

[MrAl]

I have a device which communicates via RS-232 Port, there are some commands for reading and writing. To make the communication automatic I am using Python(PySerial Library) language, But I am facing a little problem while working, that is, initially everything works fine but after some time I get consistent error of communication failure. I searched a lot on the internet but did not found any relevant solution for that. Programming wise everything is correct from my side, maybe there are some issue with hardware I am not able to figure out.
So please help me to make a robust serial communication system.
Any SOP(Standard Operating Procedure) regarding serial communication programming would be highly appreciated.

PS: I am using USB to RS-232 Cable to connect my RS-232 device and PC.

You can roll your own RS232 but you'll need to study the protocol first.   It is not that complicated though.

Some of the USB to RS-232 cables do not work as well as they should that could be the issue.  You may have to try a different brand.  Make sure they are the type that follow the true specs as some of them only work with a limited output voltage range.

[BeBuLamar]

Of course there could be problem with the software but as far as hardware wise if you use a USB to RS232 adapter the driver may go to sleep sometimes.