How to write serial port using C#

Question

1.00/5 (1 vote)

See more:

I have made a serial port communication application using c# window application but unable to write code for serial port . I have data in array , but not able to write that array of data in serial port..

Please Reply me soon..

What I have tried:

List

Posted 17-Sep-16 4:10am

ADI@345

Updated 18-Sep-16 3:11am

v14

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Answer 1 · 2016-09-17T04:14:00

Solution 1

Try:

SerialPort mySerialPort = new SerialPort();
mySerialPort.BaudRate = ...  // Set your parameters;
...
mySerialPort.Open();
byte[] data = ... // your byte data;
mySerialPort.Write(data, 0, data.Length);

"These all information i declare in an array named array1 ,then calling that array1 in serial write port"

So why didn't you tell us yesterday "it's an List of integers"?
They are trivial to deal with!

List<int> array1 = new List<int>();
array1.Add(1);
array1.Add(666);
array1.Add(int.MaxValue);
byte[] data = array1.SelectMany(BitConverter.GetBytes).ToArray();

Posted 17-Sep-16 4:14am

OriginalGriff

Updated 18-Sep-16 3:58am

v2

Comments

ADI@345 17-Sep-16 10:18am

where i have to call my array ..

OriginalGriff 17-Sep-16 10:26am

byte[] data = ... // your byte data;

ADI@345 17-Sep-16 10:38am

Actually i want to know that,
List array1 = new List();
I have to write this array1 in serialWrite

OriginalGriff 17-Sep-16 10:43am

What is it a list of, and how do you convert it to serial data - I don't know this because I can't see your screen. So give me information to work from and I'll try to help you - but a Generic List that doesn't even tell me what it's a list of doesn't help at all!

ADI@345 17-Sep-16 10:47am

I am unable to post my code here..

OriginalGriff 17-Sep-16 10:49am

So try to explain: I can't do anything without information!

ADI@345 17-Sep-16 10:54am

I have my data in array for which i declare array1 here , this array1 includes my information that i have to write . I simply needs to write this array1 in serial write port.

OriginalGriff 17-Sep-16 11:02am

You can't just write a list - of an unknown class - to a serial port.
You need to convert it to byte (or character) values first.
Think about it: even if it was an array of bytes, the system at the other end needs to know how many bytes to expect, so it knows when it's all finished!
And your List probably isn't byte values: it's probably a class of some form which means that the size of it is currently unknown, and may not even be the same for two different instance of the class within the list.
There isn't a generic "send this .NET object" because Serial Ports don;t know anything about .NET!

So start by thinking about what the list contains, and what is at the other end of the serial port. What is it expecting? Are you writing that as well?

ADI@345 17-Sep-16 11:10am

how will i convert bytes or character first.

OriginalGriff 17-Sep-16 11:18am

The trouble is that I have no idea what you are trying to convert *from* - and it is different for an int and a string for example.
Remember that I can't see your screen, access your HDD, or read your mind. :laugh:

ADI@345 17-Sep-16 11:22am

i am unable to send my code here..

ADI@345 17-Sep-16 11:29am

Please let me know whether i will write my array of record in serial port.

ADI@345 17-Sep-16 12:13pm

byte[] byteArray = new byte[array1];
//This code give error :-
cannot implicitly convert type 'system.collections.generic.list

OriginalGriff 17-Sep-16 12:20pm

Which is what I have been telling you for over an hour...

Ralf Meier 17-Sep-16 13:43pm

respect ... you are very patient ...

Ralf Meier 17-Sep-16 13:42pm

What OG tries to explain you :
Which kind of data have you filled-in (added) to your generic List array1 ? The content must be converted (purhaps also to string) before it's give to the serialport. The port doesn't know anything about the content of your list ...

ADI@345 17-Sep-16 14:19pm

byte[] buffer = new byte[array1]; //
how will i correct this line.. here array1 is in int.. array1 contains my record which i have to write .. so whether i have to convert this array1 into string..

Ralf Meier 17-Sep-16 16:37pm

We are turning in circles ...
My suggestion is : you show us some more of your code and (important) what your "array1" contains and how it comes in this array.
After this we must create a kind of converting-method which creates something which is useable for the serialport. But there is also one thing, we forgot : what does the receiver (the program on the other side of the serialport) awaits ? In other words : to what device do you send this data and what is this device doing with this data ?

If you want to go a step ahead you should begin with answering "our" questions AND you should improve your question with lots of more information.

ADI@345 18-Sep-16 9:17am

These all information i declare in an array named array1 ,then calling that array1 in serial write port
public void write(string text)
{
SerialPort mySerialPort = new SerialPort();
try
{
mySerialPort.PortName = comboBox6.Text;
mySerialPort.BaudRate = Convert.ToInt32(comboBox7.Text);
mySerialPort.Open();

byte[] buffer = array1;
mySerialPort.Write(buffer, 0, buffer.Length);

}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
mySerialPort.Close();

}

ADI@345 18-Sep-16 9:18am

Actually i am unable to post my whole code here...

OriginalGriff 18-Sep-16 9:58am

Answer updated.

Ralf Meier 18-Sep-16 14:41pm

Very good ... ;)
But I suppose that this don't solve the OP's problem because : Serialport.Write is one thing - the receiving of the data the other thing. Who receives the data ? This answer is (for me) still missing ...

OriginalGriff 18-Sep-16 15:15pm

Unfortunately, you can only provide proper answers to people who listen to the questions you ask them... :sigh:
I'm not convinced OP understands what a serial port is, much less what is connected at the other end, if anything.

ADI@345 19-Sep-16 1:01am

As per my query, i don't get any proper answer from your side.. i am still confuse how to call my array in serial write port .. if u know please reply, its urgent for me ....

ADI@345 19-Sep-16 9:39am

I am using information provided by you , but one thing i want to know that i again need to declare data in array1 during serial write communication
array1.Add(1);
array1.Add(666);
array1.Add(int.MaxValue);
byte[] data = array1.SelectMany(BitConverter.GetBytes).ToArray();

Ralf Meier 19-Sep-16 13:43pm

No ... but you should declare Array1 in the same way as OG has done "List of INT"