Programmig with Serial ports
Iam trying to send a message from my PC to a simulator through serial ports.Does anyone help me how can i proceed?
check out the javax.comm package and documentation, it has some sample programs for sending and recieving on the serial ports. Be careful with the installation, there have been some threads about this lately, but some of the files need to be installed in c:\program files\jre or similar, you can search the forum. Hope this helps :)
Similar Messages
-
Communicating with Serial Port
Hi,
Hi I have an application that i have to communicate with serial port...
Its working perfectly if am giving all the com settings as constants(pls hav a look @ codea).
But i want to read the port number and baud reate from text file.When i changed the coding,in the serial
setting i was not even able to find the port number and baud rate.it was displaying as buffer size.I think the way i connected the port number and baudrate to the clusture may be wrong(pls refer codeb).How do i fix this problem?
Thanks in Advance....
Solved!
Go to Solution.
Attachments:
modemsetting.JPG 88 KBThe problem I think is that you don't have a cluster tied to the center terminal of the bundler so most of the values don't have a name. Wire the cluster from above to the center terminal on the lower bundler. BTW, it doesn't matter what values are in the cluster you wire up because they will be overwritten.
Mike...
Certified Professional Instructor
Certified LabVIEW Architect
LabVIEW Champion
"... after all, He's not a tame lion..."
Be thinking ahead and mark your dance card for NI Week 2015 now: TS 6139 - Object Oriented First Steps -
Any way to communicate with Serial PORT using JavaScript
is there any way to communicate with Serial PORT using JavaScript ??
Dont tell me to do it in java because I need to this on client side not on server side.
such as when client pressed the button, a javascript function will be called and in that function I need to communicate with the serial port of that client... That action will not go to server side.Is there any way to send a string of bytes to the serial port from the client side ?
Just a button on the web page that sends out stuff to the comport.
I was hoping to do this using java script also .. -
Use a HP 34970a with serial port
Hello,
I have labview 7.0 and I have to use a HP 34970a with serial port.
Can anyone say to me any advice to do it?
Where can I find some material?
Thanks
VincentHi Vincent,
> I have labview 7.0 and I have to use a HP 34970a with serial port.
> Can anyone say to me any advice to do it?
> Where can I find some material?
Your first step should be visiting http://ni.com/idnet and search for an
instrument driver for your device (in this case I can promise you will
find one).
The "Learn" link on the same page tells you more about instrument
drivers in general which could be helpfull if this is the first time you
are working with instrument drivers.
Rico -
Communicating jsp with serial port
Hi, I'm developing an web application that needs to communicate with Serial port. I'm not getting how to communicate with Serial port. I'm building application using jsp. Any one help me Please...
package serialio;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.OutputStream;
import java.util.Enumeration;
import java.util.TooManyListenersException;
import javax.comm.CommPortIdentifier;
import javax.comm.PortInUseException;
import javax.comm.SerialPort;
import javax.comm.SerialPortEventListener;
import javax.comm.SerialPortEvent;
import javax.comm.UnsupportedCommOperationException;
* @author SASH
public class SimpleWrite
implements Runnable, SerialPortEventListener {
public String line = "";
public String line1 = "";
public String text1 = "";
public String text2 = "";
public void run() {
static Enumeration portList;
static CommPortIdentifier portId;
// static String dest = "0517111930";
static String messageString = "Hello";
InputStream inputStream;
static SerialPort serialPort;
static OutputStream outputStream;
public void serialEvent(SerialPortEvent event) {
switch (event.getEventType()) {
case SerialPortEvent.DATA_AVAILABLE: {
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
try {
while ((line = reader.readLine()) != null) {
arata(line);
// System.out.println(line);
} catch (IOException e) {
System.err.println("Error while reading Port " + e);
break;
} //switch
public int getWrite(SerialPort serial) {
try {
inputStream = serial.getInputStream();
outputStream = serial.getOutputStream();
try {
serial.addEventListener(this);
} catch (TooManyListenersException e) {
System.out.println("Exception in Adding Listener" + e);
serial.notifyOnDataAvailable(true);
} catch (Exception ex) {
System.out.println("Exception in getting InputStream" + ex);
return 0;
public static void main(String[] args) {
portList = CommPortIdentifier.getPortIdentifiers();
while (portList.hasMoreElements()) {
portId = (CommPortIdentifier) portList.nextElement();
if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
if (portId.getName().equals("COM3")) {
try {
serialPort = (SerialPort) portId.open("SimpleWriteApp", 9600);
SimpleWrite wr = new SimpleWrite();
System.out.println(wr.getWrite(serialPort));
} catch (PortInUseException e) {
System.out.println("Port In Use " + e);
try {
outputStream = serialPort.getOutputStream();
return;
} catch (IOException e) {
System.out.println("Error writing to output stream " + e);
try {
serialPort.setSerialPortParams(
9600,
SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
} catch (UnsupportedCommOperationException e) {
public String arata(String line) {
System.out.println(line);
if (line == null ? "250075C54CD9" == null : line.equals("250075C54CD9")) {
System.out.println(text1);
return "250075C54CD9";
} else if (line == null ? "1D00451A3270" == null : line.equals("1D00451A3270")) {
System.out.println(text2);
return "1D00451A3270";
return line;
this code is working correct getting output at system output terminal but i want use further in as input for my jsp how to get this ?.......
arata method is also working correct in class but it is not returnig value in jsp?
plz give me way how to take string as input ........... -
Error 37 with serial port / no with hyperterminal
I have added to my Pc a card with two serial port, I can access to them by hyperteminal or by labview but only at port 0 and 1 at the same time or 2 and 3, if not I have an error 37. What can I do?
Error 37 means that LabVIEW cannot find the appropriate serial device. This indicates that one of the following conditions exists:
LabVIEW cannot open the specified serial port;
LabVIEW cannot find the file serpdrv.
Make sure that the serial driver was installed before the board, and that the com ports appear normally in the control panel. If you cannot get it working, contact NI through either phone or email support. Since there are several potential causes, this is difficult to diagnose without more information. You can contact NI using the following webpage.
http://sine.ni.com/apps/we/niae_asc.main
Kim L.
Applications Engineer
National Instruments -
Problems with serial port synchronization.
Hello to all!
I have an oxygen analyser, the equipment has a serial port for communication, being based the communication on the AK communication protocol.
In order to request to the equipment that responds with the measured value, the following command in hexadecimal is sent: (02 78474B4FE20 03), obtaining like hexadecimal answer the following: (02 58474B4FE203220323038353030 03), in which it is included the measured value.
I need to have the measurement from equipment in a PC, using the AK protocol and the serial port. For this, I have made a (vi) that it writes the read measure command in the serial port, wait a time (150ms) and read the port, this way everything works correctly, but there is a problem and it is that the communication is very slow due to the delay between the writing and the reading.
If I eliminate the delay, the synchronization between the writing and the reading is lost, appearing readings of value 0. I think that is because the PC read the port and the analyser not yet has responded to the request from PC, and this happens in spite of using the options of synchronization of visa read and visa write vi's, (Do I/O synchronously).
I would need to design a (vi) that hoped that the equipment had sent the last data, and then it sends the reading request again, being able this way to make the communication more fast and to eliminate the erroneous readings.
I have attached two examples, first is (vi) that works well, but has the problem of being slow due to the delay, and the second analyzes the received message to know when this complete and then it writes another message of read to analyser, but it appears to me an error (ocurred AT sights read... Time out) after minutes.
I would thank any aid that somebody could offer to me.
Greetings and thanks!
Attachments:
Test_AK.zip 32 KBI don't have a serial port connected on this machine at the moment (they are becoming rare on laptops!) but try this code as a starting place. I notice in your second example you are basing the read on receiving a specific string, in the one I've made you can set the bytes at port compare to a number equivalent in length. I haven't tried it, as I mentioned before, so I appologize for any errors in my code.
P.M.
Putnam
Certified LabVIEW Developer
Senior Test Engineer
Currently using LV 6.1-LabVIEW 2012, RT8.5
LabVIEW Champion
Attachments:
serial read.vi 67 KB -
Thinkpad with serial port (RS232)
For my job I need a laptop with a serial (RS232) port.
I have the choice of the following laptops: Lenovo Thinkpad X230, X230T, T430, T530, W530.
Neither of them have a serial port, right?
I saw some mention of an adapter for the ultrabay slim bay, that would support an RS232 adapter.
Does that work for all the above mentioned models?
And if so, would the RS232 port work in the same way as the regular one? I need to program e.g. an Agilent datalogger with Labview to measure and recieve the measured data through the serial port.
Kind regards,
Rachel.thare are two ways :
1. you can buy a usb to seial cable converter.
2. if your laptop have a Docking Station. there is a serial port in the Docking station. Put your laptop on the Docking station, the windows system will automatically recognizes the serial port.
For example, my laptop is thinkpad x61t, Itself does not have any serial port, But there is a serial port on the Docking station.
I am a volunteer, don't work for Lenovo. I am a software engineer.
thinkpad x61t, os:win7 Awavo Software com port monitor serial port monitor -
are there any laptops by hp that have a serial port along with usb?? I really need a true serial port.
Hi 241R ,
Here is a link to probook 6470b which has a serial port -http://www8.hp.com/h20195/v2/getpdf.aspx/c04296097.pdf?ver=4
Hope it helps
Regards,
PraTH_KR
Although I am an HP employee, I am speaking for myself and not for HP.
**Click on “Kudos” Star if you think this reply helped** Or Mark it as "Solved" if issue got fixed. -
Fastest Thinkpad with serial port
Hello!
what is the fastest thinkpad with dock station or port replication that still have the serial port that has been produced?
Is it the X60 ?
I have my faithful T30 but it is a little slow now...
CiaoWelcome to the forum!
Although the integrated serial port died with T30 and A31p, it's still available on dock for most newer ThinkPads:
http://www-307.ibm.com/pc/support/site.wss/MIGR-61297.html
Good luck.
Cheers,
George
In daily use: R60F, R500F, T61, T410
Collecting dust: T60
Enjoying retirement: A31p, T42p,
Non-ThinkPads: Panasonic CF-31 & CF-52, HP 8760W
Starting Thursday, 08/14/2014 I'll be away from the forums until further notice. Please do NOT send private messages since I won't be able to read them. Thank you. -
Looking for 17 inch tecra with serial port
do they exist?
any current models with rs-232 serial port still on board?
i know the 14 inch models have it, but i need a 17 inch model..
grtPretty sure there are no 17" Tecra models.
-
Is there a Labview Chroma6310 driver that works with serial port instead of GPIB?
The driver that I have downloaded from NI site is based on GPIB, I need to run it via serial port. I don't have GPIB board. I am pretty new in NI world. How easily can I convert the GPIB driver to serial port (ASRL)? Has anybody already done this? Any help on this is highly appreciated.
Best regards,
FarshI haven't looked at the driver and I'm not familiar with the instrument but the conversion should be pretty simple. If it uses VISA for the GPIB communication, the conversion is already done. VISA works with both GPIB and serial - just use the name of the serial port as the VISA reference name. This would be ASRL1 or Com1. If it's an older driver with the traditional GPIB calls, then replace every instance of GPIB Write and GPIB Read with VISA Write and VISA Read. You might also have to add some line terminator like CR/LF to every write. There are a lot of instrument drivers that are compatible with both serial and GPIB. The HP34970 is one that comes to mind. You might want to look at it to see how to do it yourself.
-
P35 Neo Combo won't boot with Serial Port disabled
Need to disable onboard serial to free up Com1 for new PCI Serial card. Older DNC program needs to use COM1. As soon as the onboard Serial Port is disabled the PC won't boot. Have updated BIOS to latest version. Have seen a couple other people mention this on the net but no solutions yet. Any ideas?
Probably a BIOS bug.
Try contact MSI for on this issue and see if they could provide any fix.
>>How to contact MSI.<< -
Slow waveform reading time when digitizer is combined with serial port command
Hi All,
I'm using Digitizer PCI-5112 to capture and differenciate waveforms. The waveform measurement from NIScope will be used to determine the command to be sent to Newport ESP 300 motion controller.
When I run read.vi the digitizer will read the waveforms in a high speed as I wanted. For the same waveform, when I combined read.vi with command to ESP 300 (becomes control.vi) the waveform reading becomes very slow (approximately only 1 waveform per second). Is this happened because of hardware limitation of ESP 300 ? Is there anything wrong with my program to send the command to ESP 300? or Is there any other way so I can keep reading the waveform in a high speed? I realize may be this is because I put the waveform reading part and sending command part in the same loop. But I don't know any other way to do this. I would appreciate any clue or answer. Thank you very much.
Attachments:
control.vi 156 KB
read.vi 108 KBHi Dennis, Thank you for the response.
Sorry, I forgot to attach Positioning.vi at my previous message. This Positioning.vi is used to read the position of the axis. I think I get what you mean, I've tried to remove the while loop for the Positioning.vi but it didn't give any effect. Could you kindly check this positioning.vi for me?
Actually this is my first time communicating Labview with motion controller. I got those functions from my colleague. Is there any example or library I can refer for the 'normally used' serial functions? (my connection is RS232) It would be very helpful for me.. Thanx
Attachments:
Positioning.vi 18 KB -
Interaction with serial port (RS232)
Hi!
I am workin with a PLC and I need to get information about connecting it to an Oracle DB.
Anybody could help me? I have no idea where to begin looking, any information would be very useful.I doubt you are going to get this to work directly. I can't think of a PLC that includes the ability to load the Oracle SQL*Net client, but it has been a few years since I did PLC programming.
If you can't load the SQL*Net client over the only alternative would be to implement the TTC protocol directly and this is not a published specification.
Perhaps you should use a PC client of some sort as a 'middle man' to interface with both the PLC and the Oracle DB.
Mark
Maybe you are looking for
-
How do I drag files in Finder to a different folder?
How do I drag files in Finder to a different folder?
-
How to design a custom browser using Java?
Hi, Which of the Java APIs (packages) we have to use to design a custom browser? thanking you,
-
New field in ME28 output in ALV grid
Dear All, In ME28 - PO release transection code, when we run in ALV gird, we have a TAX code field but not the tax code description. Can we have this, if yes let me know the procedure. Thanks, SAmir Bhatt
-
Im trying to install the JavaBeans Activation Framework. On the download site it says all you have to do is include the 'activation.jar' file, which comes with the download, in the system Path variable. Ive tried this, and I just cant get it to work.
-
Under places there is a folder which I can't access and can't delete
In Finder, Under Places there is a folder which I can't access (click on) and therefore can't delete. It has a yellow and black wheel next to it.