Serial port

Serial Port C# Console Read

24 Nov 2012 by OriginalGriff

The problem is that the serial port is doing something called buffering - it is receiving the data from your microcontroller while your software is waiting for you to press a button on the keyboard. When you press the button, it fetches the next input line - which is the oldest, not the newest -...

Optimise serialport data recieved handling

24 Dec 2013 by Sergey Alexandrovich Kryukov

Just some recommendations, but they might be a key solving your performance problem and the problem with loosing data.Do all serial port communications in a separate thread and use only the synchronous read. Your thread is supposed to be blocked at the reading calls when the data sent is not...

Continuosly serial port read

1 Dec 2015 by George Jonsson

You need to sit down and think about what you are doing.Your method serialPort_DataReceived is, most likely, triggered every time a byte is received.So when a byte is received, what do you do?Well, if you expect a certain number of bytes to be received you can read the available...

MSChart

read

Read serial port data from web application

6 Apr 2016 by F-ES Sitecore

If you're pushing this site out to selected clients then you could do something like write a Windows Service that responds to HTTP requests and interacts with the hardware ports and sends an HTTP response back to the calling client. That way your webpage could use normal jQuery ajax to query...

MVC

C++/CLI reading Binary From a Serial port

22 Apr 2011 by Nish Nishant

You need to call ReadByte in a loop until it returns -1. And then you can probably use File::WriteAllBytes to write it to a file. If you want to append to the file, you'd need to write more code (something similar to what you already have now.And I don't think it makes sense to display...

C++/CLI

Read data in Serial Port in C#.net

22 Jun 2011 by Sergey Alexandrovich Kryukov

Of course if won't work this way. You can send data to serial port from the button event handler, but you cannot read this way. This is blocking operation.You need to read all the time in a separate thread. When data comes, it will read it; you need to interpret data on the fly.Please...

C#3.0

stack corruption around the variable

4 Aug 2011 by Guyverthree

C pallini is correct the problem that you are having is that a char is only a single byte.an int can be 2 4 or even sometimes 8 bytes in the length this is why the stack is corrupting.You are trying to put 2/4/8 bytes into the address space of a single byte.This then overwrites the...

stack corruption around the variable

4 Aug 2011 by Chuck O'Toole

This may not be the solution to your stack corruption but there is another problem in that code.All of your strings you are sending over the serial line are declared to be 8 characters and you transmit 8 characters but the strings are only 6 characters (7 if you count the null at the...

WriteFile() crashes when trying to carry on multithreading

23 Sep 2011 by E.F. Nijboer

This is a classic producer/consumer problem that needs synchronization to make it work properly. It's just like in real life, it is impossible to write both at the same time using just one pencil. You need to make rules about sharing or make one person responsible for writing stuff...

Designing an application that communicates to hardware through serialport

15 Aug 2012 by Kenneth Haugland

The documentation from Microsoft should help you along:http://msdn.microsoft.com/en-us/library/system.io.ports.serialport.aspx[^]Here is a site with complete code:http://www.dreamincode.net/forums/topic/35775-serial-port-communication-in-c%23/[^]

application

How to read Binary Data from Serial Port without any Encoding?

27 Oct 2015 by Patrice T

Quote:I am expecting the result data of C# application like the result from Matlab and XCTU. I have tried with SerialPort encodings(ASCIIEncoding, Unicode, Latin). But nothing works. Help me. this is my code,The trick is simple, you receive binary data from serial port, don't convert it.Your...

Which is the faster way to read serial port in C#

23 Dec 2015 by OriginalGriff

You can't guarantee that time frame with windows: it's a preemptive multitasking OS, so it decided when your app gets to run, and for how long. If it decides to suspend you at the wrong time, then you will miss the time slot and there is nothing you can do about it.My personal preference...

How to get weight scale indicator in C#

8 Jul 2018 by OriginalGriff

Start by checking your communications settings using HyperTerminal or similar - when you can read the data properly using that, transfer those settings (Baud rate, bits per char, parity, stop bits) into your code and see if you can duplicate what hyperterminal shows. Until you can do that, you...

RS232

Raw TCP/IP packets over serial line - How to pass to TCP/IP stack

6 Apr 2011 by DonTone

Hi,I have a simple question about a problem that surely someone has already encountered. I have a legacy device that communicates (communicated) with another device through RS-485. It does this with its own protocol, which is quite simple and embedded in there are raw ARP, IP, TCP, etc...

TCP/IP

Serial communication in VC++ using windows form (Beginners)

25 May 2011 by Sergey Alexandrovich Kryukov

Do you accept Rich text format string coming out from a serial port? :-)I doubt. Why not using a TexBox? Or, better yet, a ListBox (convenient to append one message at a time).Don't try to mix serial port communication and System.Windows.Forms. Separate concerns. Find out how to work with...

Read data in Serial Port in C#.net

22 Jun 2011 by Tarun Mangukiya

See at MicrosoftHow to access serial and parallel ports[^]Thanks.

C#3.0

Real time chart with data from a serial port

8 Mar 2012 by Aaron Pate

I was just wondering, Is there a way I could display data from a serial port on a chart in real time, if not by just refreshing the web page?Basically I have a radio receiver hooked up to my computer by a serial port. I need to get the data so i can plot a chart that will show the frequency...

Silverlight

chart

datareceived += and -=

4 May 2012 by OriginalGriff

I would try closing the serial port, removing the handler, and the opening the port again.

SerialPort reading problem

8 Jun 2012 by Amund Gjersøe

Your timer should not be necessary, and let port.RecievedBytesThrescold=1 (default). The only thing you can be sure of if you set it to 21, is that it will be at least 21 long. My suggestion is to do the buffering your self:byte[] buffer = new byte[50];int endOfBuffer = 0;void...

send and read data with serial connection

26 Oct 2012 by CPallini

If you are programming for Windows, I suggest you to use directly Windows API. They are very well documented documented[^] and relatively simple.

serial

Problem in Serial Port Communication

29 Nov 2012 by André Kraak

'0x01' is not the same as 0x01 (without the quotes).For example 0x77 is a hexadecimal representation of the value 119, which in turn is character[^] 'w'.Remove the quotes from the second format and it should work.char...

VisualC++

C# Serial Port Error.

18 Apr 2013 by Sergey Alexandrovich Kryukov

Probably you mean SerialErrorReceivedEventArgs.EventType, its type is not string but...

Transmission rate over the serial port

2 May 2013 by Sergey Alexandrovich Kryukov

Please see my comment to the question. The whole idea is wrong: you never wait for anything in your code. Are you trying to do a spin wait? This is always an evil. Either use a timer events or a separate thread (better); sleep between sending cycles. But even this could be wrong, due to the...

MFC

how to send "1" to a serial port and then receive the values the pic will be sending me after it received "1"

2 May 2014 by OriginalGriff

Firstly, stop opening and closing the port: it won't help and it may cause data to be lost. While the port is closed, anything received by the physical port will be thrown away...and it allows other applications to "grab" the port as well. And you don't need an event handler to pass the data...

PIC

microcontroller

What`s the Problem with this Plot Program win32

28 Mar 2015 by Sergey Alexandrovich Kryukov

Hey Sergey! Thiago wrote:I actualy didn't know this. Thanks for telling me! Someone formatted it for me. Ok, I've been told that SetPixel is too slow, but I am afraid I don't know what else to do. Do you have tips? Could you recommend a real-time plot library?Thanks,ThiagoYou are...

How Do You Communicate Between a Logic Board and Host Laptop

22 Jun 2015 by OriginalGriff

We can't tell you - because we don't know.You need to talk to the manufacturers, and try to get some idea of the communications protocol from them. You can't "guess" how to talk to it - there are far, far to many different ways to do it. If you had the communications software it's possible...

Which is the faster way to read serial port in C#

23 Dec 2015 by CPallini

I guess that:There is no noticeable performance difference between method (1) and (2).There is no way to guarantee the within 15ms responsivity.

Which is the faster way to read serial port in C#

25 Feb 2016 by Patrice T

First optionSerialDataReceivedEventHandlerEvent handler is there to prevent consuming resources while continuously checking the next char.

Serial port wrong value

18 May 2016 by Patrice T

Advice:- use a char array to store the data received from serial. You can't have expectations about what is the data you are receiving. Never receive in a string and then transform to char.- To debug the serial link, replace 1 of the devices with a computer using a terminal emulator. it will...

What do I do wrong? Wpf serialport communication

19 Jul 2016 by Patrice T

Quote:I need to display something when I receive a data. Could u tell me how to fix my code? I think invoking new EventHandler doesn't work correctly.There is nothing to fix, you need to rewrite your code.But first of all you need to understand how serial port is working. It is slooooow,...

WPF

Null refernce exception during serial port communication attempt

15 Sep 2016 by CPallini

You never assign a valid value to the COMPort variable.You should do soemthing similar toCOMPort = New SerialPort()' set the various parameters of the serial port hereSee SerialPort Class (System.IO.Ports)[^].

null

reference

Reading serial port in C#

26 Sep 2017 by OriginalGriff

Try setting the DtrEnable[^] and RtsEnable[^] properties to true: it may be that the unit expects hardware handshaking that HyperTerminal is setting high. But also try adding the data from your device to the string in your DoUpDate method: private void DoUpDate(object s, EventArgs e) {...

Serialport receives data as 2 part

7 Dec 2017 by Jochen Arndt

You are handling receiving in an asynchronous event. That is triggered when new data are available. In your case port.BytesToRead is one with the first event. Once the event has been handled (one byte is read) it returns. Meanwhile additional bytes has been received and the event has been...

Sending hex data to serial port via C#

2 Jun 2018 by Patrice T

Quote: The code is compiling but there is no data received. I fear your problem is that serial port is slooow, but you close the port immediately after sending your data. You need to keep the port open to give it a chance to receive data from logger. Since serial port is slow, the handler will...

Using circular buffer for reading data from serial port

7 Jun 2018 by Jochen Arndt

Note: Answered this on a repost of this question but going to add it here as well because the repost might get deleted. Added also some more information. I still don't think that there is a need for a ring buffer here. You already have a buffer: rxBuffer. To make that a ring buffer all you...

Why some commands to serial port are accepted with a right respond and other not

22 Jul 2018 by Jochen Arndt

The data received handler is executed in another thread. That is why you have to use Invoke to update the content of your text box from. Similar applies to the DataToSetandGet variable used there to store the received string. You can't use it from other threads (like the GUI / main thread as in...

event-handler

read/write

Serialport communication C#

21 Mar 2019 by OriginalGriff

Start by communicating in both directions using Hyperterminal or similar: establish that coms is possible and exactly what parameters are needed. Then hard wire those parameters in and do a basic test without using events to ensure that your code is basically connected. Expand that to use your...

C# serial port using with timer and while

21 Jul 2019 by CPallini

Why are you using a timer for reading? Use the DataReceived[^] event handler instead. See, for instance Serial Comms in C# for Beginners[^].

communication

Create a listbox that shows available serial ports synchronously

2 Oct 2019 by Maciej Los

Wel... Start here: Ready-to-use serial port enumeration list box[^] For further details, please see: SerialPort.GetPortNames Method (System.IO.Ports) | Microsoft Docs[^] [EDIT] There's no guarantee that SerialPort.GetPortNames method will return the names of ports. But, there's work-around....

How do I access this serial device ?

13 Sep 2021 by k5054

Assuming that you're using linux ... I think you should have a /dev/ttyUSB0 or /dev/ttyUSB1. That's what I get for a similar device connected to either a Rasberry Pi or my main system running Fedora 33. I think maybe I've seen /dev/ttyUSB1 when...

Ports name and description in combo box

5 Oct 2022 by Richard Deeming

Try something like this: using (var searcher = new ManagementObjectSearcher("SELECT DeviceID, Caption FROM WIN32_SerialPort")) { string[] portnames = SerialPort.GetPortNames(); var ports = searcher.Get().Cast()...

Programming the Tektronix TDS 340 100MHz digital storage oscilloscope

7 May 2023 by ToughDev

In my previous article I provided some information on the Tektronix TDS 340 100 MHz digital storage oscilloscope and instructions

Remember smartterm 240 dos program? How to create a C# version of that?

23 Aug 2023 by CHill60

There are many resources here on CodeProject - I suggest you start with the following Serial port[^] Serial Port Programming Part 1 – A (Very) Brief Introduction[^] Basic serial port listening application[^] Serial Comms in C# for Beginners[^]

Threading.Timer and read from SerialPort problem

9 Mar 2011 by OriginalGriff

Without seeing the code you are actually using, it is difficult to work out what is happening. However, it may be worth you changing from Timer based serial port to event based: Handle the SerialPort.DataReceived event instead of doing it every x ms.The File/SerialPort difference could be...

serial communication with microcontroller in vb.net

16 Apr 2011 by OriginalGriff

First thing to do:Open HyperTerminal (or similar) set up the com port, the baud rate, bpc and stop bits.Try to talk to your microcontroler using the keyboard. If that works, then move on to step two. If it doesn't work, then find out why first. It may be control lines (RTS/CTS etc.) it may...

microcontroller

Read data from serial port: Using source on same computer

20 May 2011 by barneyman

it looks like that product outputs the NMEA over the com port so another external device can consume it - not really what you're afterEither connect another computer with a null modem cable (or a computer to itself if it has 2 com ports) or use a virtual serial driver that understands how to...

serial

Serial communication in VC++ using windows form (Beginners)

25 May 2011 by Richard MacCutchan

You don't actually say which bit is causing you the biggest problem, but this[^] is a useful page on serial port handling.

Getting error only first time I communicate with my SerialPort later on its working fine.

26 May 2011 by Ruard

I don't know if this is really going to help but you can clear the buffers after connecting:SerialPort.DiscardOutBuffer()SerialPort.DiscardInBuffer()and add some delay (like Sleep(100);) between mySerialPortObj.SendFunc("{3QFG}"); and string receivedString =...

Please explain this QBASIC code to me and tell me how to implement in VB.NET

1 Jun 2011 by Mathew Crothers

Start by looking at reference and examples here http://msdn.microsoft.com/en-us/library/system.io.ports.serialport.aspx[^].You need to open a com port with 300baud, no parity, 8 data bits and 1 stop bit.After that you can create a stream to write and read from the serial port.

COMPort

forms

Visual Basic Graph of Serial Input is Not Correctly Reading Arduino Output

26 Jul 2011 by OriginalGriff

Probably, your problem is that you are calling DiscardInBuffer so often. If your VB code is out of sync with your Arduino code (and lets face it, it will be since the Arduino is continuously pumping data in realtime with a brief delay, and the VB is working when windows feels like it) There is a...

how to insert RFID datas to access database?

28 Aug 2011 by OriginalGriff

Assuming you have a connection to your database, use the following SQL Command string:"INSERT INTO TB (G_P) VALUES('" + "OC:OO:9F:A0:A3" + "')"Normally, I would also recommend that you use a parametrized query, but get it working first!

SerialPort.DataReceived - thread count

3 Nov 2011 by OriginalGriff

Serial Ports are buffered, both in the hardware and within Windows so there is little risk of overrun, unless you are taking a stupidly long time in the handler - remember that event handlers are not interrupts, so the hardware can continue buffering data perfectly happily while you work with...

forms

Close Serial COM Port safely in C#

9 Nov 2011 by OriginalGriff

Don't abort the thread.Instead, use a timeout on the SerialPort (SerialPort.ReadTimeout Property[^] which will cause the read operation to throw a timeout exception). Use a semaphore to tell the thread to terminate when it can, and let it close down in an orderly way.

C# - NetDuino - Serial

12 Nov 2011 by OriginalGriff

It freezes because you are doing a blocking Read call , having set the timeout to zero. That means that the Read will not return until Buffer.Length characters have been read - the error timeout has been disabled by the zero you wrote to it. If te Arduinoi does not supply at least Buffer.Length...

Arduino

Read com ports continuously in c#

8 Apr 2013 by Sergey Alexandrovich Kryukov

Strange entangled code. I cannot see where you add a handler to an invocation list of the instance of the event DataRecieved. Why are you trying to read data in the event handler which itself should be called when data is received? Why you invoke it? Invocation will cause a call in the UI...

COMPort

Control brightness of device attached to serial port

23 Jan 2012 by LittleYellowBird

You need to look at the specification for your Signboard. There you should find the protocol and the commands that control each aspect of it's use including the brightness.You need to break the problem down into smaller parts. You will need code to communicate over the Serial port (there are...

Control brightness of device attached to serial port

23 Jan 2012 by Sergey Alexandrovich Kryukov

You need to use the class System.IO.Ports.SerialPort, please see http://msdn.microsoft.com/en-us/library/system.io.ports.serialport.aspx[^].Generally, you will need to code an exchange protocol in a separate thread.Everything else depends on the specification of your device on the other...

How to understand if data comes to serialport buffer

10 Feb 2012 by Jochen Arndt

You are calling ClearCommError() but did not check the error value. Maybe that will help you finding the problem.You are checking if there are more bytes available than your buffer can hold. That's good. But if this happens, you should call the receive function again immediately.You are...

How to open COMXX files(serial port)

7 Mar 2012 by CPallini

You should escape backslashes in C/C++, writemyPort = CreateFile("\\\\.\\COM14",..

Win32

How to read Null in Serialport Communication

13 Mar 2012 by Dave Kreskowiak

A null is nothing but a byte value of 0. So, scan your buffer after the read and look for a 0. There's your null.Unless, of course, youre dealing with Unicode strings, in which case, it's two 0 values in a row.

Serial communication error.the error is it is giving the output of get has eror and port has erro

18 Apr 2012 by Jochen Arndt

This line contains multiple errors:CreateFile(port_name,GENERIC_READ|GENERIC_WRITE,0,NULL,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL|FILE_FLAG_SEQUENTIAL_SCAN,NULL);port_name is not initializeddwCreationDisposition must be OPEN_EXISTING for serial portsdwFlagsAndAttributes should be 0 for...

file-system

Setting values in ini file....

24 Apr 2012 by Wes Aday

You can do myComport.Handshake = (Handshake)Enum.Parse(typeof(Handshake), "None");Replace "None" with the string that you read out of your ini file.

A program that simulates a serial device to test my code?

6 Jul 2012 by SoMad

I don't actually use any of these serial port sniffers, so I am afraid I cannot recommend one. If you are dead set on this approach, please just ignore this post.I prefer doing end-to-end verification of the data and normally connect two serial ports with a null modem cable, send stuff out...

A program that simulates a serial device to test my code?

10 Jul 2012 by Espen Harlinn

This might help: Virtual Serial Port Driver[^]If you have two serial ports on your computer, Sorens' suggestion is probably cheaper. Best regardsEspen Harlinn

How to make calls using vb.net through a phone?

29 Aug 2012 by khn1o1

I want to make an application using vb.net by which i can make calls through connecting my phone though serial port. How can i do this?

API

phone

How to make calls using vb.net through a phone?

29 Aug 2012 by Sandip.Nascar

Indeed you need to use TAPI (Telephony API)Here are few links which will give you some indepth knowledge in TAI and VB.NETWorking with TAPI 3.x from .NET[^]http://msdn.microsoft.com/en-us/library/windows/desktop/ms734257(v=vs.85).aspx[^]Hope this helps.cheers

API

phone

How communicate with serial port in Java ?

30 Aug 2012 by ridoy

http://www.java2s.com/Code/Java/Development-Class/ReadfromaSerialportnotifyingwhendataarrives.htm[^]http://stackoverflow.com/questions/589334/how-to-read-and-write-from-the-serial-port-with-java[^]http://henrypoon.wordpress.com/2011/01/01/serial-communication-in-java-with-example-program/[^]...

Java

How communicate with serial port in Java ?

8 Dec 2020 by ranjith m amin

I am doing project in which i need to access serial port and read the data from , write data into it. How can i do this in Java.Please Help Me ..Thanks in advance

Java

Serial Communication on Visual Studio Express 2008

14 Sep 2012 by Jochen Arndt

See CreateFile()[^] and Communication Functions[^] in the MDSN. All functions are Windows API functions that can be used with the Express editions.

how to use Serial ports programming in C#

29 Jan 2013 by CPallini

You should connect the LEDs to a microcontroller. Your application, in turn, should serially communicate with the microcontroller itself.There are many available tutorials[^] on serial communication with C#.

Problem with Serial Port communication program

2 Apr 2013 by Jochen Arndt

To get code that might work you should:Initialize the serial port (baud rate, number of bits, parity, flow control).Perform a dummy read to clear the status register bits.Replace the delay loop by code that checks if new data are available by testing bit 0 (Data Ready) of the line status...

HTML and RS232 Serial

23 Apr 2013 by Sergey Alexandrovich Kryukov

None of HTML codes or a Web application cannot access such things (on a client system). You need to use some programming system, some programming language. Communication via a RS-232 port is really easy, but it depends on your platform and programming system (language, compiler, libraries) you...

Transmission rate over the serial port

2 May 2013 by CPallini

What are trying to do? If your communuication really needs an accurate synchronization (how accurate must be the 100 milliseconds period), you are going to fail (Windows OS cannot provide it).

MFC

how can I receive messages (line by line) through serial port from microcontroller by received event like hyperterminal?

13 Aug 2013 by The_Inventor

THIS:// Form1 // this->AutoScaleDimensions = System::Drawing::SizeF(6, 13); this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font; this->ClientSize = System::Drawing::Size(471, 262); ...

Get hardware unique ID

19 Nov 2013 by Ron Beyer

Serial is just a way of exchanging byte data with a device, its not really like USB where the device exchanges hardware descriptors with the host before it "connects". On top of that, there are no standard interfaces for the devices you listed to get a hardware id from them, they would have to...

Optimise serialport data recieved handling

24 Dec 2013 by GrooverFromHolland

Hi all,I am receiving 5 data packets per second and loosing packets because handling the data received event and processing data takes too much time.How can I improve my code?This is the relevant code:private void portCs_Datarecieived(object sender, SerialDataReceivedEventArgs...

How to serialport Reading on c#?

12 Apr 2014 by OriginalGriff

Oh, good grief...You need to take a big step back and brush up on how Windows in general and Events in particular work.Look at what you are doing: private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)// split the data { ...

read

How to receive data properly from Mbus in C#?

11 Jul 2014 by Rob Philpott

There could be a few things wrong here. The VB array bounds was a good spot.Chars in .Net are 16bit, and that could be the problem. You're working with binary data so don't use them. Just checking the documentation for the SerialPort class, default encoding is ASCII, 7 bit. Anything above...

How Can I Get Microcontroller Data And Cut Bytes One By One ?

15 Sep 2014 by George Jonsson

You should decide on a format that works for you.The first choice you have is to decide between a binary or ASCII protocol.Both have their pros and cons, but simply putASCII is more readable, easier to debug and good if you want to hook your device up with HyperTerminal.It is a bit...

AVR

Change DCB fields from SerialPort instance C#

23 Nov 2017 by Sicppy

I am trying to emulate communication between an existing piece of software and hardware, using Advanced Serial Port Monitor I was able to come up with this information about the communication.In/out queue size 1024/512Purge the serial port: RXABORT, RXCLEAR, TXABORT, TXCLEARSet timeouts:...

Change DCB fields from SerialPort instance C#

24 Dec 2014 by Sicppy

Alright I solved my problem, I'll post the code and explanation here if anyone is interested.The DCB struct requires a C++ class known as a bitfield, which C# does not have, so instead they have a field called "Flags" stored as a UInt32. They have their own melarchy set up there as to how...

Controlling DTR RTS pins of serial port using ioctl() Call in linux

28 Dec 2014 by Jochen Arndt

It seems that your device is configured for hand shaking by default. You can (and should) use tcsetattr to configure your device. You may also try to use the TIOCMBIS ioctl command to set the DTR and RTS state.You can only set the state of the output pins RTS and DTR. The state of the input...

c# Serial Communication

2 Mar 2015 by Sergey Alexandrovich Kryukov

You misunderstood Control.Invoke. This is not event invocation, so your object sender and EventArgs arguments are superfluous. Having this made-up artificial limitation, you have done bad thing: passing the text through the outer context relative to your method. Instead, you should use the event...

Serial Program Problem!

13 Mar 2015 by bling

Take a look at this line:tx = ReadFile(hCom,&in,1,&num,NULL);tx is declared as int but ReadFile returns BOOL. Your code should check the call for success / failure.num will have the number of characters read (eg. 0 or 1). Your code should check this before attempting to print...

Win32

serial

How to serialport Reading on c#?

10 Apr 2015 by Member 11314519

First of all: the ReadTimeout property should be setted once, i prefer just befor the opening action.over the internet is full of snippet you could read, msdn has its own official way to read Serial Port, even if it ain't aiming to performance...You should consider that the DataReceived...

read

How Do You Communicate Between a Logic Board and Host Laptop

22 Jun 2015 by User 59241

I refrained from answering your previous question because really where to start. The cost of the vendor software is probably going to be insignificant compared to the time you will need to spend here.I can give you a generic approach that I would employ in this situation.1. Obtain a...

How to use serial port and AT Command in c# ?

4 Jul 2015 by OriginalGriff

Google is your friend: Be nice and visit him often. He can answer questions a lot more quickly than posting them here...A very quick search gave half a million hits: Google "serial port and AT Command c#"[^]In future, please try to do at least basic research yourself, and not waste your...

ATCommands

serial loopback c program in linux

6 Nov 2015 by Richard MacCutchan

Sorry, no one here is going to do your work for you. How could you accept a qualification based on someone else's work?

How to convert the Serial out of a Arduino to socket out put(Lan network)

11 Nov 2015 by veena nair

the below sketch have a serial output at the end of the sketch. "(Serial.println(stringTwo);)"How to convert it to a socket output. I want to read the out using a c# program through lan network.===========Sketch============int LED= 2;int LED3= 3;int LED4= 4;int LED5=...

Change the duty cycle of the serial port ?

14 May 2016 by OriginalGriff

If those are individual bit traces you are looking at : 10101010 then basically, no - you can't: serial data bits are always nominally symmetric - and the pattern would be hard to repeat continuously unless you are really careful with data, start and stop bits and parity, and have some...

Serial port wrong value

17 May 2016 by George Jonsson

There are quite a few different reasons why you might receive the wrong character.You are telling very little about your hardware setup, so I can only give general advice for how you can find the error.The most common is that you haven't configured the port correctly.Make dead sure you...

Send and receive data in the same time "serial port problem"

19 May 2016 by OriginalGriff

The problem is quite likely to be that you don't necessarily receive all the data in one event - Serial ports are slooooow, and data arrives byte-by-byte: so the DataReceived event will fire multiple times for each "message" received from your PDA device. It's quite possible that it will fire...

How do I write a C-code for establishing serial communication in loopback mode.

8 Jun 2016 by Sergey Alexandrovich Kryukov

Please see, for example, this manual: Serial Programming Guide for POSIX Operating Systems.—SA

How do I write a C-code for establishing serial communication in loopback mode.

8 Jun 2016 by OriginalGriff

"Do i need any more connection?"Depends on how you have configured the port (and sometimes the hardware): for a "proper" loopback, it's a good idea to connect RTS to CTS (7 to 8 on 9pin serial connector), and DTR to DSR and DCD (1, 4, 6 on 9pin) to bypass any hardware handshaking, and to set...

What do I do wrong? Wpf serialport communication

20 Jul 2016 by User 59241

Use working examples as a starting point wherever possible. This shows how to read from a SerialPort:SerialPort.DataReceived Event (System.IO.Ports)[^]The order in which you set up and open the port is crucial (instantiate, set parameters and attach datareceived handler). Your example has...

WPF

What do I do wrong? Wpf serialport communication

19 Jul 2016 by Bernhard Hiller

You tagged your question with "WPF", but your code looks more like Windows Forms. Use a ViewModel with properties bound to the UI. The PropertyChanged event will automagically be sent to the UI thread, so you avoid all cross-threading issues (DataReceived happens always in a different...

WPF

Serial port communication very slow

10 Aug 2016 by OriginalGriff

Probably, there aren't : serial ports run at a fixed speed (known as a Baud Rate) which controls the maximum speed at which characters can be transfered between devices connected to it. If you serial port is set to 9600 baud, then you can transfer up to 960 characters per second (approximately)...

20 Sep 2016 by OriginalGriff

Serial ports are generally not "fast devices" - and when you use 9600 baud, you are saying "this port transfers 9600 bits of information per second at most". That's roughly 960 bytes per second (slightly less than that due to start, stop, and parity bits in fact) - which in terms of your PC...

hex

bytes