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Asked: 2026-05-22T16:39:43+00:00

I am using SerialPort class to communicate with an external device. I start the

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I am using SerialPort class to communicate with an external device. I start the communication at 300 Baud per second however after the initial “handshake” I have to switch to a Baud rate specified by the device (usually 9600 Bps).

I have been unsuccessful in my attempts to continue communicating after I increase Baud rate however I am not sure why. That leads me to my question: What is the proper way of changing the Baud rate? Can it be done while the connection is open, or should I close the connection first?

I have been unable to find any information about this in the documentation…

I have tried both and have been unsuccessful in both ways, which made me think that I must be missing something obvious.

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1 Answer

  1. Editorial Team

    It turns out you can change SerialPort.BaudRate while it is open. But the SerialPort.DiscardInBuffer that is mentioned in answer by @Groo is a good tip!

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