The serial interface or serial port, also known as RS-232 is a communication port used to connect modems, mouses, some printers, scanners and other hardware equipment.

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How can I reduce high CPU usage from DPC's with USB Serial Ports

I have an app that communicates with up to 50 devices over serial ports. The communication takes place in threads, and the threads are throttled so that only a certain number are active at once. ...
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Accessing serial port via sockets

I'm on windows and I need to access my com5 serial port via sockets. I tried serproxy but it does not work. Is there a better tool to do it? This serial port com5 is a virtual serial port of my 3g ...
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RS232 from a Decatur Radar to a PC

I just got a Decatur SI-2 it communicates via RS232 through a DB9 connector. So I went out to BestBuy and got a Dynex™ 16" USB PDA/Serial Adapter Cable. Since I couldn't get it to work on my Macbook ...
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How can I use my cell phone to establish a dial-up networking connection?

I am using Windows 7 and have a BlackBerry with T-Mobile (U.S.). I have paired the phone with my computer over Bluetooth, which automatically creates a serial port for it. I am able to open the port ...
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Serial port IRQ sharing on Linux

I was never able to use two serial ports for I/O on Linux that shared the same IRQ, although the serial driver has "IRQ sharing" enabled. Some BIOS simply don't have enough IRQs to give to each port, ...
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How can I replace some old serial numeric keypads?

My Problem: I have some older serial numeric keypads that are getting hard to replace. I tried a USB keypad but the distance of the cord wasn't long enough, so I tried using a USB to ethernet and ...
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How to do hardware DTR/DSR flow control on Linux (serial port programming)?

It's possible to setup a serial port communication using hardware flow control with the RTS/CTS pins (CRTSCTS flag for tcsetattr), but there is no way to use the DTR/DSR pins for flow control in a ...
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How can I monitor a virtual serial port in Windows 7?

I need to listen to everything that goes (both directions) through a virtual serial port on Windows 7 64bit. I do not need to send anything, just monitor the communication for debugging purposes. ...
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Trackball with 9 pin serial port not recognized by OS

I need to support a trackball mouse (Make:- Cortron Inc) with a 9Pin serial port connector in my application (qt VS2008). This mouse is not getting recognized by my OS (Windows XP) (I dont see the ...
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interpreting stty output to start connection with hyperterminal

I am trying to communicate between an embedded device which runs linux and a PC which runs windows xp over a RS232 connection. On windows I use Hyperterminal, but I don't know which settings I should ...
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How can I find out what chip is used in USB <-> Serial (RS232) converter from FTDI?

I have an USB <-> RS232 converter with no designation of producer on it. After plugging it into USB port on Windows Vista 64bit computer I chose an option to automatically find and install drivers ...
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How to set up a serial port in VirtualBox?

I need to access a serial device in my VirtualBox guest (Windows XP). My host system is ArchLinux 64-bit. I configured the VirtualBox serial port as follows: Port: COM1 IRQ: 4 I/O Port: ...
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Clash between PPP connections on Windows 7

I am using COM ports to connect to some hardware. I setup RAS connections for the various COM ports. If I connect to one device at a time then I am able to communicate using a TCP/IP socket with ...
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Establishing Serial Port communication through USB in Linux

I am new to Ubuntu and I need to establish a serial port communication between my PC and microcontroller MSP430G2452. On connection the USB available with the Launchpad and using lsusb. It ...
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Do I fry my device when attaching a 5V RS232 converter to a 3.3V port?

I have a device, namely a Synology DiskStation. It has a 3.3V RS232 interface on board. All I have is a 5V RS232 to USB adapter. Can I attach it to my DiskStation without making any smoke?
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What's the simplest (free) way to share a serial port over an ethernet link?

I have two computers and I'd like to access the serial port on one machine from the other. Is it possible to do this with free software and if so, what options do I have? The sharing machine is ...
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Set up a Serial-to-Ethernet Converter With a Virtual Serial Port in Ubuntu

I have a '3one data' brand serial-to ethernet converter, that plugs into a serial device at one end, and allows bidirectional communications with the device over an ethernet connection, like this: ...
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Redirecting serial port keeping ability to send signals

I have the following scenario: a laptop running Windows XP, connected to a meter through its serial port. I need to read/write to this serial port from a remote computer (running windows 7). I also ...
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Saving a binary file with HyperTerminal

I have an embedded platform that is connected to my Windows PC via the serial connection. The embedded application sends 532 bytes through the connection. Using HyperTerminal, I am able to see the ...
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File transfer over a serial line

I have 2 linux computers, and a serial line between them, one of them is only accessible through a serial line that has shell on it. How can I transfer files between the 2 computers? I've heard that ...
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connecting device without null modem cable

I have a data collector device which has a RS-232 male port, and the PC which sends data to that device has also a COM (RS-232) male port. For wiring I have a RS-232 cable (male to female) and a ...
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NetBSD Networking

I have an old Toshiba Satellite 4015CDT, with Pentium II MMX, 32MB RAM, 4GB HDD. It also has one USB 1.0 port, parallel and serial ports, a 3.5" floppy drive and a CD-ROM drive (probably almost dead). ...
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Use serial port (COM) as LPT1

I have a device that needs to be plugged in to LPT1 to run a legacy software. I am trying to find a workaround to get it running in a latptop (without parallel port, obviously). I have HL-340 ...
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Serial GPS as time source on Windows 7?

How do I use GPS device connected over serial port as a time source in Windows 7? I have a GPS receiver on my mobile phone which sends data using Bluetooth serial link in NMEA format to computer.
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Creating virtual serial port in Fedora

I want to create a virtual serial port in Fedora. I'm using Java code to communicate over a serial port. I want to test this code with out any serial devices connected.
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Prolific USB-to-Serial Comm Port significantly slower under Windows 7 comparing to Windows XP

I am using a Prolific USB-to-Serial adapter based on the Prolific chip to use with a device on serial port. I have the latest version of the driver installed: 1.3.0 (2010-7-15). When I use my device ...
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Help accessing Beagle over serial with Minicom/GTKTerm

I am trying to access a brand new Beagle Board from Ubuntu or Mac over serial using the setup seen here: http://specialcomp.com/beagleboard/RevC1.htm I got Minicom and GTKTerm installed on the Ubuntu ...
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How to switch between Linux virtual terminals over serial?

How do you switch between Linux virtual terminals over a serial terminal connection? I'm trying to install Debian on a Beagleboard via the serial console. I'm using screen (screen /dev/ttyUSB0 ...
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How does RealTerm send Numbers

How does RealTerm send numbers? For some reason, when I enter a number under the "Send" tab to be sent over the serial line in RealTerm, it works, but inputting the same commands in PuTTY through the ...
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PuTTY Serial Baud Rate Change

Is it possible to change the baud rate once the terminal has already been opened in PuTTY? If so, how would I do this?
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I'm looking for serial port monitoring software [closed]

I need a serial port monitoring software that works on windows 7 64bit or GNU/Linux and supports at least RS-232. Bonus points are if it's free software or at least freeware. I just need to be able to ...
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OS X: log text from serial port

I have a text stream coming in on a USB-RS232 adapter. I want to pipe it to some Unix tools, to a file, whatever. What is the simplest way to do so? Does it really require third-party software? OS X ...
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New serial window in GNU Screen

I know that I can launch Screen as a serial port terminal from scratch. What I want to do is to create a new window inside an already running screen session as a serial terminal. so that I don't need ...
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How can I login (send text) with minicom?

I am attempting to login from a Linux client to a set top box running Linux via a USB to serial cable. When I power on the device, I can see the init messages scroll past, and I get to the login ...
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Turning on computer using communication port

I am working on something that would require a computer to be turned on "remotely" but still within reach in the same building. I did some reading about WOL (Wake On LAN) and would like to know if ...
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VirtualBox: 4 serial ports

Is there any way in virtual box to have more than 2 serial ports? When I try to set a 3rd or 4th serial port I get "Argument slot is invalid. RT_ELEMENTS(mSerialPorts))". The documentation claims it ...
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Use Serial Port as Digital Out

Goal: Output a single bit from a program on my PC to a TTL circuit. I know I can buy a digital I/O card, but I just want a single value. Can I use one of the pins on the serial port as a single TTL ...
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USB to RS-232 Converter Power Option

I have an device that is interfaced with RS-232 that requires power on Pin 6 at 5V and Pin 5 as ground to power the device. Is it possible to do this with an USB to RS-232 Converter? If not, what ...
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Looking for Fast RS-232 or RS-485 Interface Cards for Windows [closed]

I have a module that is usually bundled with a master module, which we now want to use unbundled. The module uses an RS-485 interface. The problem is, by default, the module runs at 1.25 Megabaud, ...
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“mount” a serial port or USB or PS/2 or parallel port on a local machine over TCP/IP

let's assume I have two boxes, both running some (any) unix variant. I have root privileges on both boxes and they are networked together. I'm using A, the other is B. I'd like to "mount" the ports ...
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How can I send data to the serial port from a Linux shell?

I need to find the linux way of running the following DOS commands: MODE COM1: 9600,N,8,1,P COPY FIRMWARE.COD COM1 Is this possible? I know COM1 in Linux is /dev/ttyS0 but that's about it. How do ...
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Is there a limit to the number of USB to RS-232 ports my computer can support?

I am looking to get a whole bunch of digital output pins that I can directly control from my CPU and I am hoping to use a whole bunch of USB to serial ports to achieve this. Assuming I am using a ...
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Why are some PCs losing data coming on over USB serial?

I have an embedded device that connects to a PC using USB and enumerates as a USB serial port. The device spits out approximately 30 megabytes of data over a period of about 15 minutes. My PC is ...
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XP to XP link with SLIP over serial - No IP address on host computer side?

I'm trying to set up a SLIP link using a serial connection between two XP computers. This is to test some specialized communications hardware that only supports IP via SLIP. As a starting point, I'm ...
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Serial port access errors in WINE

I have a setup in which I use a USB serial adapter + some application which sends and receives data using that serial usb. But this setup which works on a Windows, or even in a VMWare Virtual windows, ...
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Dell Optiplex 755 - serial port driver for windows 7 64bit

I have a dell optiplex 755 (tower), it was shipped originally with vista but was recently reinstalled using Windows 7, 64 bit. THe serial port driver, and something else called "PCI Simple ...
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Serial port RS-232 and Security

If I have a device connected to serial port RS-232 on my computer and an application that is communicating with it. How secure is this? Can another application communicate with the device at the same ...
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How to use IrDA adapter as serial port?

I remember back in windows 98 era that you could install IrDA adapter and associate serial port with it so it would work just like rs-232 to infra-red adapter. Is such thing possible on windows 7? Is ...
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Display Hex in PuTTY for Serial

Does anyone know if there is a way to get PuTTY to show the hex values of what it's receiving over a serial connection instead of characters?
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Multi serial devices on one port

I am developing one software for managing parking lot. System is designed to use four HID RFID devices for authorization clients on gates. Each device should be connected to server by Serial port ...