Passing a Command to a Comm Port Using C#'s SerialPort Class

Question

I'm currently trying to pass a specific command from an example test application written in VB6. In VB6 the command looks like:

Comm1.Output = "UUT_SEND ""REMS\n"" " + Chr(10)

Currently I'm trying to figure out how to pass that same data via C#'s SerialPort class.

Keith Nicholas · Accepted Answer · 2013-07-08 21:38:47Z

3

sending stuff out the serialport is relatively straight forward....

var serialPort = new SerialPort("COM1", 9600);
serialPort.Write("UUT_SEND \"REMS\\n\" \n");

To get any responses you will have to hook the DataReceived event.

edited Jul 8, 2013 at 21:38

answered Jul 8, 2013 at 21:11

Keith Nicholas

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7 Comments

DanteTheEgregore Over a year ago

Quote from the manual: For example, “UUT_SEND ““REMS\n”” ”. Note the use of \n, which indicates a Carriage Return (CR) as the end-of-line character. Other characters include \r (Line Feed), \t (Tab), \b (Backspace) and \f (Form Feed). Also note the double quotes around <uut command> to show embedded quotes.

DanteTheEgregore Over a year ago

Did you mean whether \n is literal or a carriage return?

DanteTheEgregore Over a year ago

I'm rather terribly confused. The manual refers to \n as Carriage Return and \r as Line Feed. Is this correct? I believe \r is Carriage Return and \n is New Line in C#.

Keith Nicholas Over a year ago

just looked it up ... msdn.microsoft.com/en-us/library/4edbef7e.aspx \n = NL = Ascii 10 decimal \r = CR = Ascii 13 decimal. In this case the Chr(10) = \n

Keith Nicholas Over a year ago

also looked up VB6, apparently the \n in your string is literal

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