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C# Serialport Datareceived


You may be running with DataReceived on a zero load system that's 1000 times over-spec for the task, and as a result the failure rate due to a race condition may The specific symptom in this case is an ObjectDisposedException thrown on a separate thread that cannot be caught. SerialPort.DataReceived Event .NET Framework (current version) Other Versions Visual Studio 2010 .NET Framework 4 Visual Studio 2008 .NET Framework 3.5 .NET Framework 3.0 .NET Framework 2.0  Indicates that data has been That said, am I supposed to believe that you googled it and that is your support?

We appreciate your feedback. That's wasted design time, in every single consuming codebase, that could have been spent on what differentiates your product. Fred Fred says: March 23, 2016 at 1:54 pm Im expereincing problems with my code … Im getting a System.IO.Ports error when i execute my code on my moxa. Those are horrible approaches that should be dealt with via sender timestamps in the data stream, etc. https://msdn.microsoft.com/en-us/library/system.io.ports.serialport.errorreceived(v=vs.110).aspx

C# Serialport Datareceived

Is this an acceptable approach or can you offer any advice for what I'm doing? It should be something like this: string CommErr = SerialError; Now depending on what SerialError is, you might need to call the ToString() or a property that displays its text value. Use the serial port the way it was designed. Cancellation of overlapped or async operations may play into your issue as well.

If I can build a non-blocking state machine (and that might be a big if), and I have event driven serial read routines, it shouldn't matter what thread the event handlers I guess if that you are basing your lamenting comments on your experience, you should probably learn how to create professional programs and not blame the technology. (Editor's note: removed profanity) I've read a lot of the posts regarding non-blocking code but I'm still not sure the "right" way to go about it. C# Serial Port Datareceived Thread EDIT I found some more info on the event handler, it looks roughly like this: protected virtual void OnUsbConnected(object Sender, EventArrivedEventArgs Arguments) { PropertyData TargetInstanceData = Arguments.NewEvent.Properties["TargetInstance"]; if (TargetInstanceData != null)

There are some SetupDi APIs (I think ... C# Serial Port Read Example cyberh0me Superhuman 103,178 exp Reply #5 — Posted 3yr ago (modified) by cyberh0me | Superhuman | 103,178 exp Reply #5 — Posted 3yr ago (modified) by cyberh0me | Superhuman | 103,178 interesting project you could change your code to read bytes as soon as they are available when they are available and this in a new thread namespace { class { private Reply Ben Voigt says: May 3, 2015 at 7:58 pm You'd think that, but as far as being a wrapper for the underlying API goes, BaseStream isn't anywhere near complete.

Only one event handler can execute at a time.The DataReceived event is not guaranteed to be raised for every byte received. Serial Port Listener C# BTW, in first comment, IOSPS should be IOPSP. But if more data were available, it’s possible that the reader won’t get all the data when the app has finished all of its reads. Reply Ben Voigt says: October 22, 2014 at 12:53 pm "As far as I know" leads to false assumptions.

C# Serial Port Read Example

Thx, Reply Andreas D says: March 5, 2015 at 2:40 am I'm pretty much "suffering" with SerialPort as well, especially the fact it deals with the device "suddenly disappearing" while the you could check here Hardware handshaking control: the Handshake property Port selection: constructors, PortName property, Open method, IsOpen property, GetPortNames method And the one member that no one uses because MSDN gives no example, but C# Serialport Datareceived Reply Ben Voigt says: February 1, 2016 at 9:33 am So you work for one of those groups that takes the attitude "CFR 21 doesn't actually require us to use the C# Read Serial Port Continuously Was the term "Quadrant" invented for Star Trek more hot questions question feed lang-cs about us tour help blog chat data legal privacy policy work here advertising info mobile contact us

Lagos Mihali says: January 31, 2016 at 7:29 am Boy, I have hundreds of instruments and robots running on hundreds of apps and couldn't disagree more. Calling the Win32 API directly we would be able to streamline this even more, for example by reusing a kernel event handle instead of creating a new one for each block.  You can specify starting index and length. Reply Just Sayin! C# Serial Port Datareceived Event Not Firing

Disproving Euler proposition by brute force in C How to find the distance between 2 regions? So, if you ship a C++ program to customers you need to deal with that, but not if it is .net. And working for an FDA regulated manufacturer says nothing about the projects you don't apply the same level of scrutiny to. Matt says: December 10, 2014 at 2:05 pm I'm getting compile error due to kickoffRead(); being an unassigned local variable in VS2012.

One of the main reasons is that SerialPort and its underlying BaseStream are designed to behave similarly to other .NET streams, which (for example) means that Read() may not act as Vb.net Serial Port Example I’m looking for some full example from send to receive an answer. Marya says: October 21, 2014 at 2:50 pm Is there any way the we read from the buffer without knowing how long is the buffer?

You may prefer this because this is less invasive than updating your Invoke calls.

rx says: April 6, 2015 at 6:33 pm Why not publish your code "as is" on github? Besides, at SO you'll get input from multiple experts. It is not applicable to a variable that is part of a method, since it's already most accessible to the method itself. C# Serial Port Readexisting Yes, I do suggest that you quit commenting now, because if you continue without clarifying what class of device you use .NET and IOPSP in, you look like you have something

So, it could be System.IO.Ports.SerialError error = e.EventType; Look, no matter what you want to achieve, it's apparent from your attempt to write code, that it is absolutely useless to write To get a string: ReadExisting reads all available bytes and returns a string using the encoding you specify on the SerialPort. I learned how to program In 1966 and have been working in a GMP environment since 1973. I will give you the benefit of the doubt by extending you a chance to clarify that implication -- I truly hope that you were simply trying to throw around supposed

Reply Ben Voigt says: January 28, 2015 at 10:09 am Some of the issues are related to the fact that the software APIs support all the handshaking modes, and many USB Reply JPelletier says: October 9, 2015 at 3:52 pm Thanks Ben for the great article! It looks like I may not be alone: https://www.nuget.org/packages/UnmanagedExports Any thoughts on this subject? I am now using the Marshall software libraries that uses the API.

Examples of bugs this tip addresses SerialPort.Read(buffer, offset, count) appears to return unexpected data SerialPort.Read(buffer, offset, count) does not wait for all of the bytes to be received Developers sometimes assume Important differences are that the event actually carries the received data with it, so the application is all set for processing serial data, and the implementation does this with a single As far multiple sensors I would try to move that code into a separate thread. Learning resources Microsoft Virtual Academy Channel 9 MSDN Magazine Community Forums Blogs Codeplex Support Self support Programs BizSpark (for startups) Microsoft Imagine (for students) United States (English) Newsletter Privacy & cookies

It seems like you did neither. So, continue to take your chances. You have two choices: either declare myComPort as a static member of your class, or use the sender argument of the event handler: static void comPort_DataReceived(object sender, SerialDataReceivedEventArgs e) { SerialPort I also noticed if I send the same message several times (Port.Write("w");Port.Write("w");Port.Write("w")) that it works.

here: public class Program { private static object _memberField; private static void MemberMethod() { // not here: // private static object _insideMethod; // <- will not work } } share|improve this