LinuxQuestions.org - Serial communication with minicom

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Serial communication with minicom

I have a RS-232 link between a computer and an instrument.
The computer is sending (or receiving) commands to (from) the instrument through the serial port (Com1).

I wanted to monitor those communications so I have installed and run MINICOM.
I was indeed able to see live the responses from the instrument on the minicom screen.

However, when minicom is running, an error will eventually occur in the communication
between the instrument and the software. It's as if the instrument doesnt like having two softwares talking to it at the same time.

So the question is:
Is MINICOM simply "listening" to the line of communication or is it also sending queries to the instrument (hence interfering with the software) ?

Quote:

Originally Posted by butor20022 (Post 4253390)

Just to be clear: I know I can send commands using minicom, but I'm talking about the situation where I would simply let minicom run without typing anything.