I've a question to ask.
I'm wondering that the DataReceived event is automatically raised
whenever
a data comes from serialPort? I've read but couldn't find info here:
http://msdn.microsoft.com/en-us/library/system.io.ports.serialport.datareceived.aspx
[
^
]
I've written a little program to read data every 3 seconds from serial port, but that doesn't work quiet well.
The code is below:
string
buffer;
SerialPort sp =
new
SerialPort(
"
COM1"
);
sp.BaudRate =
9600
;
sp.Handshake = Handshake.None;
sp.DataReceived +=
new
SerialDataReceivedEventHandler(DataReceivedHandler);
private
void
serialPort1_DataReceived(
object
sender, System.IO.Ports.SerialDataReceivedEventArgs e)
buffer= sp.ReadExisting();
I don't want to use Timer, because the data doesn't always arrive in 3 second intervals. So, I can't get precise datas.
I know this's a simple question, but I'm stuck...
Any idea how to read with intervals?
My best regards...
If you want to read at specific intervals, then use a Timer.
If you want to process data as it comes in, use DataRecieved.
But be aware that DataReceived is fired every time a byte arrives - so the data you read is likely to be a single character each time, and "buffer" will never hold an entire message if you overwrite it every time you handle the event.
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