Qt - Setting a custom baud rate

Question

I'm attempting to set a custom baud rate of 10400 to my device on Linux using Qt. However, when I run the application, the console output keeps reporting that

Baud rate of serial port /dev/ttyUSB0 is set to 10403 instead of 10400: divisor 2307.692383 unsupported

I've also set the data bits to 8, parity to no parity, and stop bits to 1, which are pretty standard.

Here's my code by the way:

serial -> setBaudRate(10400); // Set Baud Rate
serial -> setDataBits(QSerialPort::Data8);  
serial -> setStopBits(QSerialPort::OneStop);
serial -> setParity(QSerialPort::NoParity);

When I run the application on Windows however, it works totally fine.

My device isn't able to connect with any other baud rate other than 10400. The application is able to compile and run, however the result is all garbage. I want to know if there's a way where I can specify this baud rate without any problems?

So, it doesn't work on linux, or you're just annoyed about the message? — hyde
@hyde My device isn't able to connect with any other baud rate other than 10400. The application is able to compile and run, however the result is all garbage. I want to know if there's a way where I can specify this baud rate without any problems? — xcyl40
It seems like a bug in Qt, which was fixed in Qt 5.6, as said in my answer. — hyde

Kuba hasn't forgotten Monica Kuba hasn't forgotten Monica · Accepted Answer · 2016-07-11T20:04:48

That's a warning; it means you should fix the code, but the code still happens to work. What you're trying to do is not supported by the hardware you run on. Windows is only quieter about this, it doesn't support it either.

Qt - Setting a custom baud rate

2 Answers