Help with SerialPort and C#

[Andrea Judge]

Hi there,

I'm developing an application to catch OBD sensors' data from my car.
I connect it via a RS232 interface.
Now.
with HyperTerminal I can connect and send/receive data, but I'd like to do
this from inside my C# program.
Anyone can write down a very small (or tell how to do it myself) application
containing methods like WriteToSerialPo rt(string what) and
ReadFromSerialP ort(what).

Using the built in control SerialPort, I can correctly open a port, and
write something to it (commands like "ATX" and other worked fine from
HyperTerminal), but I can't read nothing, using SerialPort.Read Line(). This
method always generates a Timeout exception.

What's wrong?
To send, for example, the "ATX" command through the serial port, I use
SerialPort.Writ e("ATX"), but nothing seems to happen.

Hope someone will help me soon!!!


Andrea

[Ales]

Re: Help with SerialPort and C#

Hi,
you should use SerialPort.Read Line() when you recive DataReceived
event. If no event is triggered then you didn't recive any data.

Try to send SerialPort.Writ eLine("ATX") or SerialPort.Writ e("ATX\r").

Ales

Andrea Judge je napisal:[color=blue]
> Hi there,
>
> I'm developing an application to catch OBD sensors' data from my car.
> I connect it via a RS232 interface.
> Now.
> with HyperTerminal I can connect and send/receive data, but I'd like to do
> this from inside my C# program.
> Anyone can write down a very small (or tell how to do it myself) application
> containing methods like WriteToSerialPo rt(string what) and
> ReadFromSerialP ort(what).
>
> Using the built in control SerialPort, I can correctly open a port, and
> write something to it (commands like "ATX" and other worked fine from
> HyperTerminal), but I can't read nothing, using SerialPort.Read Line(). This
> method always generates a Timeout exception.
>
> What's wrong?
> To send, for example, the "ATX" command through the serial port, I use
> SerialPort.Writ e("ATX"), but nothing seems to happen.
>
> Hope someone will help me soon!!!
>
>
> Andrea[/color]

[ozbear]

Re: Help with SerialPort and C#

On Thu, 22 Dec 2005 18:32:27 +0100, "Andrea Judge"
<judge@SPAMNOGR AZIEarea51staff .it> wrote:
[color=blue]
>Hi there,
>
>I'm developing an application to catch OBD sensors' data from my car.
>I connect it via a RS232 interface.
>Now.
>with HyperTerminal I can connect and send/receive data, but I'd like to do
>this from inside my C# program.
>Anyone can write down a very small (or tell how to do it myself) application
>containing methods like WriteToSerialPo rt(string what) and
>ReadFromSerial Port(what).
>
>Using the built in control SerialPort, I can correctly open a port, and
>write something to it (commands like "ATX" and other worked fine from
>HyperTerminal) , but I can't read nothing, using SerialPort.Read Line(). This
>method always generates a Timeout exception.
>
>What's wrong?
>To send, for example, the "ATX" command through the serial port, I use
>SerialPort.Wri te("ATX"), but nothing seems to happen.
>
>Hope someone will help me soon!!!
>
>
>Andrea
>
>[/color]

Send a carriage return along with your command string.

Oz
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