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 to view properties of an open serial connection?

How can I view which properties an open serial connection has? So the baud, start and stop bits, the parity, the number of data bits and especially how the to be transmitted string is terminated (line ...
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1answer
386 views

Delete virtual serial ports in Windows XP

In my registry file HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\SERIALCOMM there are 14 ports that I want to delete – \Device\VCom11 to \Device\VCom24. I deleted the ports with Registry Editor but after ...
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89 views

Overheat alert warning on CPU through Serial port

Is there any way to make an external alarm go off if your CPU reaches a certain temperature using your serial port? I over-clocked my processor and I get warnings if it reaches a certain temperature, ...
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200 views

How can I set the power on default state of serial port on Windows 7?

How can I set the DTR line to high by default when a Windows 7 machine starts up? Background: My own Windows service sets the condition of the com port lines to indicate its status. One of these is ...
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2answers
8k views

How can I access putty from linux terminal?

I'm trying to configure my cisco 2950 switch and I need to use putty on linux. Im not used to using linux but I've been told that putty is built in to linux terminal. I have my serial console cable ...
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1answer
276 views

How to quickly determine which process (if any) listens to a serial port

I am looking for a command to see the process listening to a port, e.g. /dev/ttyS0 (with root rights on a Linux system). I can do that with lsof /dev/ttyS0 but this is really too slow. Also, I ...
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1answer
40 views

Determining if I need a 32 bit or 64 bit driver for OSX 10.7.2

I'm looking to download an ftdi driver for OSX 10.7.2. I will be using it for work I'm doing in python 2.7.x, using pySerial. I have no idea how to determine whether I need to download the 32 or ...
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0answers
506 views

Virtual COM Port Using usbser.sys Keeps Dropping

I have a C# wpf application that is communicating with a device via a virtual com port over USB. This device is using the usbser.sys driver. Everything works normally as expected and communication is ...
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1answer
199 views

IrDA adapter - how to enable speeds less than 9600

I need to use infrared usb adapter tekram IR-410W under win8. unfortunately it doesnt create virtual com ports. another trouble is IrCOMM driver doesnt work under win7/8 i need to communicate to ...
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2answers
11k views

Gigaware USB to serial adapter not working on Windows 8

I'm trying to use a Gigaware USB to serial adapter on my new computer. It worked fine with Windows Vista and XP, but not on Windows 8. It's not working and I get this message under device properties ...
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1answer
660 views

Mount serial port through ssh connection (Mac/Linux)

I'm working on a MacBook Pro under mountain lion and I would like to mount serial device connected (/dev/ttyUSBx) on a Linux PC under Ubuntu 12.10 through SSH. I tried with sshfs to mount /dev ...
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2answers
403 views

Terminal emulator in windows which can store commands

Is there any good terminal emulator program which will help me save commands so I dont have to type them again and again . It is for communicating with a serial port (COM port) in windows and I have ...
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1answer
827 views

Displaying / Setting USB BlueTooth Buffer Size

In Windows 7 there is a sequence of mouse clicks on various icons which will display the buffer size of a given Com Port. I can't remember that sequence at this moment. I know I did it once before. ...
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2answers
2k views

Is DB-25 port Serial or Parallel?

I would like to know whether the DB-25 port is a serial or parallel port. These ports are otherwise known as printer ports, aka LPT port. I'm very confused about this since, according to Wikipedia, ...
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6answers
50k views

This device cannot start. (Code 10) - Gigaware USB - Serial Adapter

I'm trying to use a Gigaware USB -> Serial adapter that worked fine on Windows XP on Windows 8. It's not working and I get This device cannot start. (Code 10) A device which does not exist was ...
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1answer
117 views

Serial cable vs USB-to-serial adapter

I have a device with RS-232 and a control program on PC. It works fine via serial cable but with usb-to-serial some functions don't work correctly. Why usb-to-serial doesn't work? I tried to change ...
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1answer
1k views

Serial com issue with virtual box

I have an issue in using the serial port with virtual box. My host system is Windows, my guest system is ubuntu. I have setup a serial connection between the local Windows and another distant PC, ...
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0answers
73 views

Forwarding Data from COM Port via Ad-hHoc Network on Linux

I'm new to Linux and I'm trying to setup an ad-hoc network between two computers in order to send data coming from a COM port on one computer to the other. Currently I'm running Lubuntu 12.04 on both ...
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3answers
1k views

Why do some serial interfaces have many pins?

Various hardware connectors that are dubbed "serial", e.g. USB and PCI-express, have many more than 2 pins/wires. In fact even the good old "serial port" has them. But since they are serial, not ...
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2answers
650 views

Is there free software that can convert serial input messages to TCP/IP packets?

There is a serial port that can receive text messages from the external device. Now I want to pass these messages to a special software. But that software can only receive TCP/IP packet. For example, ...
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3answers
825 views

PCIe x1 serial card suddenly stops working

The Perpetrating PC... MB:MSI Z77A-GD65 OS:Windows 7 Pro CPU:Intel Core i5-3570k Ivy Bridge Memory:16gig G.Skill Ripjaw PSU:Cooler Master Silent Pro 700w HD:1TB WD Cavier black Rosewill rc-300e ...
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0answers
531 views

Send <esc>a with picocom

I have connect a USB serial adapter to my Linux box. I'm trying to connect to the device with picocom and I have to send an escape sequence like <esc>-a (hex: 1B 61) How to do this, ...
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641 views

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
131 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
239 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
4k 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
4k 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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358 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
644 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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0answers
121 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
974 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
128 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
691 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
4k 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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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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1k 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
2k 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
18k 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
456 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
5k 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
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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
495 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
1k 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
787 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
213 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 ...