Usb to Serial port adapter

I have a gilsson usb to serial port bi directional adapter cable which uses the Prolific pl-2303 chipset. I am attempting to use this cable to interface a Mac Mini with a Harsper PDP plasma television.
I am attempting to control the functions of the television via the serial port on the television. i.e. Turn on, input, volume, etc.
What I need is software, or source code that would allow me to send hexidecimal commands to the television and receive the task completed codes.

ZTerm will allow serial communications. Get it to ensure that throughput is happening as expected.
RealBasic will allow you to roll your own with a fair amount of ease.
A long time ago I used the above to communicate with my cellphone to send and receive text messages via the serial port, so I know it can work. Understanding the protocols is the difficult part...

Similar Messages

USB to Serial port adapter - Mac thinks it's a modem

I’m trying to connect my Mac’s USB port to a Sony Beta SP recorder's Serial Port using a generic USB to Serial adapter which uses the Prolific PL-2303 chip.
I’m using the latest Prolific Universal driver, but when I plug in the USB cable I get a message that a ‘new network device has been detected’ and suggesting that I use System Preferences to set it up. But in System Preferences it seems to think the USB to Serial adapter is a modem and is looking for a phone number and other configuration data.
Does anyone know how to get it to work as just a serial communication device to my Sony’s serial port? If I get it working I'll be connecting it to an RS232 to RS422 adapter to talk to the Sony port.
Thanks.

Thanks Andy.
I'll have a go again. It was late last night when I was trying to set it up, so maybe a fresh brain will have more success. I did try to 'Cancel' the network preference window that opened, but got the impression that it would not work unless I did 'something'. Someone else told me I could cancel that message permanently within System Preferences, so I'll try that too. Yet another bit of advice I got was that I would have to install 'MacPorts' and run something called 'Minicom' to set up the serial parameters. Windows was so simple by comparison
As a non-techie (at least in all these software and protocol issues) I'm more than a little confused.
Regards
Message was edited by: esmonde

Problems with asynchronous visa read with USB to serial port adapter

I have an application that sends and recieves data from a power supply and on most computers (desktop PCs), the application runs fine. I found that on at least one computer, using a Keyspan Tripp Lite USB to RS232 adapter, in one out of 25 queries, I wasn't getting the whole reply back from the instrument. After some debugging I found out if I switch the VISA write and read calls from synchronous to asynchronous I don't see the error any more. Is there a way to disable asynchronous mode for that computer? I'd rather not have to find all the VISA write calls in my application and update each one just to support that computer.
CLD (2014)

Try playing with the Tx ACK Advance setting on that port first. (From the Keystone config utility) You might also look into the Rx FIFO buffer settings (16 is a short default buffer)
There is no (Easy) way to universally disable Async . VISA Async tranfers MAY complete synchronously anyhow (It throws a warning when that happens) So if Keystone settings do not help you might want to swap out to a FTDI chip enabled USB - serial device.
Jeff

Usb to serial port converter in lenova g560

hi this is madhan. i m using lenova g560 ideapad. there is no serial port in my laptop. For my project i need a serial port. i heard tat in market USB to serial port converters are available. Does Lenova g560 support this change?? If so is there any driver to make support to serial port?????????

If you buy a Serial-USB interface/cable you won't have any problem. Usually this accesory comes with drivers. If you have Windows 7, mayte it will detect all automaticaly.
Regards.
IPnaSh
First Spanish Community Guru - Colaborador ad honorem

USB to serial port

Hi all,
I am working on a VI to acquire data external to computer. The data is
being acquired via the serial port of the computer. When i first built
the software in labview , i tried it in my desktop( which had serial port) and it
worked fine, i was also able to generate messages in labview and send
it serially out.
However now i tried it in my laptop which didnt have serial port. So i
bought a USB to serial adapter. I can see the data from the in hyperterminal. But i cant get labview
to work with the simulated serial port. Labview doesnt display the
readings and gives an error: "unknown system error". I cant figure out
why, there must be no mistake in the labview program as it works fine
in my desktop, and also no mistake in the data being sent cause i can
see it in the hyperterminal window in the proper format.
Please help.
Thank you.

No, I am using Windows Xp only, however it has started to work today when i again tried, I do not know why!, but thank you all for your replies, i should have posted my query after testing it thoroughly. My apologies.
vinay
Message Edited by raybuzz on 07-27-2009 05:58 AM

USB to Serial port delay

I have some LabVIEW code that communicates with a TI MSP430 development board via a USB serial port simulator. The hardware that does the serial to USB conversion is part of the development board. how the application works is the LabVIEW code sends a request using the VISA write VI, and the board responds. The requests and responses are both about 5-6 bytes each, and are being sent at 115200 baud 8-N-1.
Everything works, but there is a roughly 600ms delay between sending the request and receiving the first byte of the response. After the first byte is received, the other bytes are received within 1 ms. I assumed the firmware in the develoment board was slow, but I put a scope on the RX and TX lines coming out of the microcontroller, and the firmware responds in less than 1 ms, so the microcontroller isn't the issue. So somewhere between the UART to USB hardware, and LabVIEW, there is a 600ms delay. I have a feeling that it is the TI development board, or drivers that are holding things up. The USB to serial stuff seems to be kind of flaky generally on these boards. However, I wanted to come on here, and see if anyone had any ideas about how I might figure this out, or what might be wrong. I'm going to post on the TI forums also, and see if I get a resonse there.
Has anyone seen an issue like this before using USB to serial converters?
Is there something else I could try to narrow down where the issue is, or rule out some part of the system (like making sure that it isn't an issue with the VISA drivers)?

Jeff·Þ·Bohrer wrote:
What is the USB-Serial chipset?
The FTDI drivers offer some latentcy optimizations. Others do not.
Most TI MSP430 boards have their own build in USB interface based on the TUSB3410 from TI and the according driver for it is the TUSBWINVCP package. Nothing to do with FTDI.
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

USB and serial port access in java

Hi
I have a magstripe card reader connected to my computer with a USB interface (port).
I am using javax.comm API to get the card swipe data but could not succeeded.
Can i do that or have to do something else ???

ok. Below is my code:
this is a sample code come with the API.
package msr;
* @author Dell
import java.io.*;
import java.util.*;
import javax.comm.*;
* Class declaration
* @author
* @version 1.8, 08/03/00
public class SimpleRead implements Runnable, SerialPortEventListener {
    static CommPortIdentifier portId;
    static Enumeration           portList;
    InputStream                inputStream;
    SerialPort                serialPort;
    Thread                readThread;
     * Method declaration
     * @param args
     * @see
    public static void main(String[] args) {
    boolean                portFound = false;
    String                defaultPort = "COM3";
     if (args.length > 0) {
         defaultPort = args[0];
     portList = CommPortIdentifier.getPortIdentifiers();
     while (portList.hasMoreElements()) {
         portId = (CommPortIdentifier) portList.nextElement();
         if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
          if (portId.getName().equals(defaultPort)) {
              System.out.println("Found port: "+defaultPort);
              portFound = true;
              SimpleRead reader = new SimpleRead();
     if (!portFound) {
         System.out.println("port " + defaultPort + " not found.");
     * Constructor declaration
     * @see
    public SimpleRead() {
     try {
         serialPort = (SerialPort) portId.open("SimpleReadApp", 2000);
     } catch (PortInUseException e) {}
     try {
         inputStream = serialPort.getInputStream();
     } catch (IOException e) {}
     try {
         serialPort.addEventListener(this);
     } catch (TooManyListenersException e) {}
     serialPort.notifyOnDataAvailable(true);
     try {
         serialPort.setSerialPortParams(9600, SerialPort.DATABITS_8,
                            SerialPort.STOPBITS_1,
                            SerialPort.PARITY_NONE);
     } catch (UnsupportedCommOperationException e) {}
     readThread = new Thread(this);
     readThread.start();
     * Method declaration
     * @see
    public void run() {
     try {
         Thread.sleep(20000);
     } catch (InterruptedException e) {}
     * Method declaration
     * @param event
     * @see
    public void serialEvent(SerialPortEvent event) {
     switch (event.getEventType()) {
     case SerialPortEvent.BI:
     case SerialPortEvent.OE:
     case SerialPortEvent.FE:
     case SerialPortEvent.PE:
     case SerialPortEvent.CD:
     case SerialPortEvent.CTS:
     case SerialPortEvent.DSR:
     case SerialPortEvent.RI:
     case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
         break;
     case SerialPortEvent.DATA_AVAILABLE:
         byte[] readBuffer = new byte[20];
         try {
          while (inputStream.available() > 0) {
              int numBytes = inputStream.read(readBuffer);
          System.out.print(new String(readBuffer));
         } catch (IOException e) {}
         break;
}

Parallel port adapter in labview

I have usb to parallel port adapter . After plug it into my laptop some drivers installed automatically and it is detected in device manager as "parallel port printing support" under "universl serial bus controller".
I know how to write data to serial port using visa write funtion but, i dont know how to access this adapter from labview 2010
i am using windows 7.
Can anyone help me in this regards.
Thank you

Please stick to the original post. Thanks.

Any idea on what is causing my serial ports to lock up?

I recently purchased the NI serial-usb 4 serial port interface box because I was having a problem of my serial ports locking up, and I thought the problem might be with my serial port card. Well, after a few days with the NI boxes 2 of my serial ports locked up. This is a big problem that I need to get resolved. If anyone has any ideas on what might be causing this please let me know.
I am running Lookout 5.0 (build 7) and Logos 4.4.0.17 on a Dell Windows XP machine with 1GB RAM and a 2 GHz processor. I have already tried recompiling my Lookout file and clearing out my database but the problem still occurs. If I restart the file then the ports start working fine again, but I need to know what is causing this since this
wasn't a problem until about 2 months ago.
Any responses would be greatly appreciated.
Thanks
Jason
Jason Phillips

Thanks for the response, Ben.
I have Laplink running on the computer all the time, and we do have 2 SCADA packs in the field at this time, but I don't run the Telepace program on this computer. This computer does not have a modem. As far as the serial port card, I was using a "Byterunner" 4 serial port card but I purchased the NI 4 serial port -usb interface because I thought the byterunner card might be the problem.
Do you think Laplink could be causing the problem?
Jason
Jason Phillips

Adapt QCM serial port VIs for USB QCM

I am trying to adapt Labview VIs that use a serial port and use them a QCM that uses a USB port. Does anyone know how I can do this. I have limited labview experience.
The USB QCM gives me data for the thickness and mass gains of the materials deposited but I cannot correlate those mass gains with the pressures in the reactor. I need to correlate the mass gains with the pressures so I can know the pressure profiles of the materials I deposit. The serial port VIs (for a different QCM) save the data for the mass gain and the corresponding pressure but I cannot do that with the USB QCM. That is why I want to adapt the older programs which store all the information and use it with the new QCM.
Thanks
-Sicelo

You would likely want to use VISA to communicate with this USB device. If you get the VISA alias for the device, you should be able to replace your serial code with VISA code that does very similar things (such as read and write). This link shows the kind of thing you should encounter when using LabVIEW to control a USB device.

Connection to serial port via USB adapter- error -2147221503

I am trying to drive a stepper motor provided with possible Labview or VB programs. This motor is supposed to be connected via serial port, but the computer has not some, so I bought an USB adpater to connect my motor via USB. I am using the labview programs provided (Labview 8.0). The program cannot connect to the port and returns error -2147221503. Where may I find some help with that ?
Thanks
Attachments:
error labview.JPG ‏234 KB

I see references to 'Luminos'. Is this the provider of the stepper motor and LabVIEW code? If so, your first step should be to contact them. The whole VI is nothing but ActiveX properties and methods and the vendor would be the only one who knows what is going on.

Lenovo X131e doesn't work with Prolific PL2303 based USB to Serial Adapter and Windows 7 x64

This is sort of a bug report. A Lenovo X131e with Windows 7 x64 and the PL2303 driver including 1.6, 1.61 and 1.7 will not successfully install the driver - Windows always reports "Driver Install Failed" on plug in to USB 3 or USB2 ports. However, putting a USB2.0 hub inbetween the USB to Serial Adapter and either USB port type makes the adapter work fine. This was not the case with the X130e. I'm not sure where to report this beyond this posting, but more of an FYI.

If the USB can be used for other equipment,
That may be compatibility issues for USB and Prolific PL2303.
Don't plug Serial Adapter when installing the driver,
Ofter installation, Connect serial adapter to see whether it is working normally.
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

Using USB Printer on Beige G3 with Localtalk/Serial Port - How?

I have an Epson Stylus 740 which has both DIN 8/Serial port and USB connections, but the serial quit showing-up, so I want to connect via the USB connector. Is this possible?
Is there an adapter from DIN 8 Serial/Localtalk connector on Beige G3 to USB for Printer?
Or do I need to buy a PCI to USB card?
Other solution?
thanks

Russo:
If you tried to connect an adaptor to the serial port that had a USB connector on the end, it probably won't work since the serial port isn't currently working. You'd need a USB PCI card to connect to the USB.
I have this same printer, originally used the serial port and then switched to USB when I got the PCI card. This has worked great.
You should see if something got turned off. Look at these:
Under the Apple Menu>Control Panel > AppleTalk - make sure the printer port is selected
Under Apple Menu>Control Panel > Remote Access > Modem (from the drop down menu) - make sure that the printer port isn't selected
Under Apple Menu > Control Panel > USB Printer sharing - make sure that is turned OFF.
You might also have to install drivers for the Epson from the disk that came with it. If you insert the CD and choose "custom install" you'll get another screen that allows you to choose the serial driver package.
Post back if you get it working (or don't).
HTH.
A

Startech usb serial port

I have a test that needs to communicate to a piece of test hard through a usb to RS485 adapter. However I do not seem to be getting any message to through the serial port. Is there a simple test I could run to make sure that I can send something trough the digital com port?

Hi GTRITom,
Please see the following article about performing a Loopback Test.
http://www.ni.com/white-paper/3450/en
Regards,
Nathan S.
Applications Engineer
National Instruments

Virtual serial port??? Vista 64 bit, usb dongle, palm 755p verizon

I have a new 64 bit Vista OS and I'm having all the same problems everyone else is. I can't hotsync using the cable. I purchased the bluetooth dongle (Kensington) that many have said works. My phone recognizes the PC. My instructions on the phone for the hot sync using bluetooth instructs me to set up a virtual serial port. The instructions are not very clear. This is where it falls apart for me. Can anyone explain how to set up this virtual serial port? Thanks.
Post relates to: Treo 755p (Sprint)
This question was solved.
View Solution.

Well I'm happy to report a successful solution. At the recommendation of some other threads I went out and bout and ioGear GBU321 USB Bluetooth adapter and setup was a breeze and it works (although it is SLOOOOOOW compared to a cable hookup, allow some time and plug your treo in during your first sync).
To setup you do the following (And this may also work for your Kensington):
Insert the driver CD
Insert the dongle when asked.
Install the drivers
Pair your device. Basically go to the Bluetooth setup screen on the Palm and select "Trusted Devices". You'll find the bluetooth adapter, select it and then either the palm or the PC will either provide or ask for a paring code. The instructions will guide you through but basically you'll want to make sure the same numbers are entered on both screens (this prevents you from accidentally pairing with some random nearby computer)
This will actually set up your virtual port for you.
You then go into the hotsync manager and click "serial" and select the port just created from the pairing process.
If you don't know what port was created bring up "Control Panels" and select "Phone and Modem" (Assuming you are in "Classic View").
Click on the modem tag and you'll see something like "Standard Modem Over Bluetooth Link" and next to it will be the assigned port.
I hope that helps. I know I was relieved to not have to trash either my Palm or my PC (Although when the Pre or an iPhone with a physical keyboard comes out all bets are off)
Post relates to: Treo 755p (Verizon)

Usb to Serial port adapter

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