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 log in my alteon2424?

I was given an old alteon 2424. Pluging a serial cable on the console port allows me to see it booting. I can choose at boot between 2 images in nvram by pressing ctrl o. Both images talk about ...
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2answers
126 views

Serial Communication vs Device Drivers

My understanding is that serial communication is for direct CPU-to-CPU (or microcontroller-to-microcontroller) communication along a serial bus. My understanding is that a device driver is for ...
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1answer
207 views

How to make a terminal (running in Atari emulator on Mac) talk to a telnet BBS?

There are a number of Atari ST BBSes still running today, available via telnet. I connect to some of these occasionally using SyncTerm on my Mac. It would be even better to use an ATARI terminal ...
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1answer
3k views

USB-to-Serial showing gibberish at 115200 Baud

I've got a serious problem which drives me crazy because I tried everything I could think of. First of all, I made a video: http://youtu.be/boghkuq7L_s but please read the following text for more ...
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3answers
2k views

What is the minimum delay between two consecutive RS232 frames?

I have been working on creating a UART on an FPGA. I can successfully transmit and receive single characters typed on PuTTY. However, when I set my FPGA to constantly write a large sequences of "A", ...
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281 views

Again, how can I get the data sent to printer by attaching linux pc to the printer side of the wire, hen print it somewhere else?

The similar question was asked by davidb, however the circumstances are different. I have a device with the 9-pin RS-232 port and an ancient printer connected to that device. I need to replace the ...
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3answers
502 views

Simulate serial printer on pc

I have an old lab device which prints it's result to a serial printer. I need to replace the serial printer with a computer. I have connected the device's 9 pin serial port to the computer's serial ...
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115 views

Piecing together low-powered hardware for an RS-232 terminal server

I'm working on reconstructing my Cisco lab for training/educational purposes and I found that the actual terminal server I have is dead. I have a couple of 8-port PCI serial cards which would be more ...
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1answer
743 views

Sniff data on serial ttyS0 by virtualbox COM

I am running VirtualBox under linux. Gues OS is Windows XP. I have an IR transmitter connected to serial port, (yes the old kind DE-9), on my box and added the following in VirtualBox "Serial Ports": ...
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2answers
121 views

How can I tell if my serial card supports RS-485?

It's a Rosewill RC-300 1 Port serial PCI adapter. From http://www.newegg.com/Product/Product.aspx?Item=N82E16815166003, it says "The Rosewill RC-300 features a 9-pin RS232 serial port to add..." so I ...
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1answer
582 views

How to avoid modifying permissions on a file every time I start my computer

My serial port is located at /dev/ttyUSB0, and every time I want to access it after waking up my computer or starting it (Ubuntu 12.04), I have to run sudo chmod 777 /dev/ttyUSB0 to grant myself ...
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2answers
3k views

Is there any way to check which baud rates are supported on a serial device?

Is there any way to check which baud rates are supported for a serial device on Linux? I've poked around the /sys/class/tty/ttyS0 directory, but I can't see anything in there that lists this type of ...
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248 views

Sending a file to uCLinux

I have a board running uClinux, and I need to send a file to it, but I'm not sure how... I have a RS232 port, and Ethernet port with an IP address at my disposal, I can telnet to the board, but ...
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957 views

Using a named pipe to simulate a serial port on a VMware virtual machine (linux host and client)

Trying to write a python program to create a simulated data stream and feed it, through a named pipe, to a VMware virtual machine. The host is running Ubuntu 11.10 and VMware player 5.0.0. The Vm is ...
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1answer
1k views

How to setup a serial terminal for DM500HD?

I need to connect to a Linux based STB (set-tob-box) over an emulated serial terminal. I'm not sure how to setup this connection. The manufacturer has given me this number to use: 115200/8N1. What ...
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4answers
11k views

How can you test communication on a COM/Serial port?

We have a OHAUAS defender 5000 series model T51P Weighting scales with a COM port. if we connect this to a PC we should be able to get the weight on the computer by sending a command to it. Is there ...
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1answer
393 views

Is it possible to make a persistent USB serial port regardless ofthe existence of the USB device?

USB serial ports, especially devices which emulate serial ports, don't quite behave the same as old serial ports, which causes a few problems with some software. old serial ports, always existed, ...
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1answer
4k views

How to connect to Ubuntu using Serial Port?

I am using VMware and I want to connect to Ubuntu VMs via serial port. I am connecting both using pipe as referred in this website https://www.vmware.com/support/ws3/doc/ws32_devices3.html How do I ...
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1answer
2k views

Windows 7 CDC-232 Drivers Issues

This is the single most infuriating issue I have with Windows ever since XP. I recently built a new system and bought Windows 7 32bit. I am an electrical engineering student and I have a whole host ...
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2answers
2k views

Serial port splitter (1 output device -> 2 computers)

Does anyone know how I can split a serial cable so the output from one device is connected as inputs to two different computers? I try to connect the (-)(+)TX at the same to the two computer... I get ...
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1answer
405 views

can a bad cable break serial port

I had a really strange experience last week, I am not quite sure if this is the right place to ask it, I decided to give it a go. One of the technicians in my company was preparing some serial cables ...
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1answer
808 views

What does COM Stand for in terms of Serial Ports

In terms of Serial Ports what does COM actually stand for. I can't find any reference to it. (To be clear I am not talking about Component Object Model but the Hardware Interface used in Windows ...
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2answers
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Is there a free way to monitor a serial port on Windows 7 x64? [closed]

The title questions pretty much says it all. I've looked around quite a bit, but I have yet to find a free way to monitor a serial port (without opening or blocking it from other applications), that ...
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1answer
657 views

Emulating a Serial Device on OS X

I have been working with building Microcontroller (mostly Arduino) based devices for the past few months and have been quite surprised by the seeming lack of any form of serial emulation. I know ...
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1answer
1k views

How to connect to Linux USB serial gadget using Mac OS X?

I have an embedded device, on which I use the USB gadget USB interface to either make it available as a mass storage device, or enable access over USB serial using the g_serial module. While I can ...
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1answer
177 views

Serial redirection for a desktop computer

Lets suppose I have a desktop computer. Is there any way (i.e. a PCI card or some kind of software/hardware) through which I can enable the computer to support serial redirection? By serial ...
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1answer
1k views

Seeking 9-bit serial port card for Windows PC [closed]

I need to connect to serial port on a system bus which uses 9 data bits. Is there an off the shelf card which will handle that? Obviously it would need to come with driver software to return 9 ...
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1answer
1k views

LPT port using USB

I have a machine which connects to PC with LPT port. And in the program I am selecting port number on which is LPT port connected, something like etc. ( a326 ). Now I have bought LPT to USB ...
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4answers
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How do I clean up COM ports in use?

How do I clean-up these in-use COM ports? The COM port numbers always seem to be taken up by something and although right now I only have 4 serial ports (3 over Bluetooth and one USB to RS-232), I ...
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3answers
519 views

Setting up a Digital VT100 as a terminal to OS X Lion

I have followed this guide: http://www.club.cc.cmu.edu/~mdille3/doc/mac_osx_serial_console.html And I installed the closed-source Prolific driver (the open source one and the FTDI ones always gave ...
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3answers
4k views

is there a way how to remotely control computer via USB

I am looking for a way to control my other computer (win/linux) remotely (ideally via VNC) via USB or serial - without using network or virtual network. It can be fully software based, hardware based ...
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2answers
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How do I link two serial ports in GNU/Linux?

I need to have one serial port receive data and another to transmit same data. How do I make such setup in GNU/Linux. One will be a port created by bluetooth and another will be a USB to serial ...
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1answer
445 views

interface an lcd through rs232 interface

Linux has character device file representing serial port /dev/ttys*. I can simply open , read , write , close a serial port using system calls in my c program. I am working on a board which has an ...
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1answer
325 views

How can I use the Verifone Printer 900 on Windows?

Does anyone know how the Verifone Printer 900 works? I'm unable to print from Windows, can't find anything like a driver. I'm already using a serial to USB adapter. I'm using COM3.
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1answer
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How do I find the device which has Com Port X reserved - want to reclaim the port num for different device

I added a 4 port pci serial card to my windows 7 PC. I want to assign them COM1-4. I know how to change the COM Port Number when the com port number is not already in use. In my case, COM4 is taken ...
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Linux IrDA printing

I have a USB IrDA that I got working with my IrDA printer (SiPiX compact printer A6) on the Windows side, using default 4000000 speed and 1.0ms turn-around time (in the driver config). The USB IrDA ...
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13k views

Putty or Tera Term VT alternative for OS X

I am currently using putty and Tera Term VT for connecting to external devices over serial port for bugging. Is there any alternative for OS X?
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1answer
434 views

How do I set up Debian 6.0.3 to work with serial terminal?

My problem is that most guides on the Internet I've found explain how to enable serial terminal on GRUB 1 and it appears that they moved to GRUB 2 on Debian. I'm running Debian inside VMware and have ...
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2answers
2k views

How to read data from LAN cable?

I have a device that connect to a Window PC by LAN cable directly instead of serial port. Back when I use serial port, I can use coolterms or hyperterminal program to read the exact data send in from ...
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1answer
1k views

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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398 views

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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1answer
218 views

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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6k views

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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625 views

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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1answer
114 views

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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1answer
2k views

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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1answer
474 views

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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1answer
1k views

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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3answers
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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 ...