Tag Archives: COM port

Writing bytes to a serial port in C

This is a (relatively) simple example of a C program to send five bytes to a serial port in Windows. In this case, I’m sending the five characters “hello” via COM22 at 38400 baud, but of course the program can … Continue reading

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Simple command line trick for sending characters to a serial port in Windows

I often need to send short character strings to a serial port in Windows. The sort of thing I might use this for is sending a command to a robot or other microcontroller-based device that I’m building using a USB-to-serial … Continue reading

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