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 read raw serial data on linux?

I'm working a project for school that requires us to send data from our embedded system on a FPGA back to our host computer over serial. I have a UART instantiated in my FPGA and I have done all of ...
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CDC Virtual Serial Port

I would like to know what a CDC Virtual Serial Port for Windows and Linux is. I have an idea of some of the components (like a virtual serial port), but I don't understand some of the pieces (like ...
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Serial port interference on Linux?

I am attempting to communicate with a MODBUS device over serial port. On my Windows machine this works, and the modpoll software can talk to the device just fine. However, on a fresh Arch Linux ...
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Is serial port a 'male' or 'female'?

Usually, the "ports" on the computer are female but this one in specific appears to be a male port. I have never seen one and google images are also causing a confusion from seeing this: If that's ...
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18 views

How to run a virtual machine with no graphics card (VGA) configured in VirtualBox

I want to use the following feature of Linux (which one of my virtual machines): If no console device is specified, the first device found capable of acting as a system console will be used. At ...
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46 views

RS232 switching matrix for multiple devices and PCs? [closed]

I have six pieces of equipment which con be controlled via RS232. I want to be able to select which pieces of equipment are connected to any one of my three computers at a given time. I know that I ...
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1answer
53 views

How to host modern console application on legacy serial COM device in Windows

EDIT: Changed primary example from Zork Dungeon to the default OS shell. I have a console application running on a modern machine. I also have an Apple //e with a Super Serial Card, which allows it ...
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14 views

Change serial connection speed in ExtraPuTTY automatically

I really need help.. I'm using ExtraPuTTY to open a terminal on some serial port on my PC. At the beginning of the session I want to transfer a file over Putty XMODEM feature to the end-point at 3Mb/s ...
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1answer
98 views

Receiving data from Serial Port

I want to receive data from RS232 Serial port to my terminal and with a directive to a file. It should be pretty straight forward. cat /dev/ttyS0 cat /dev/ttyS0 > file.txt Before that I've ...
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2answers
141 views

Barcode scanner USB to serial

I have a problem with a barcode scanner. It came with a USB Cable but in the manual it says that it can do RS232 communication. The modes it can operate are: Keyboard Wedge, which works fine but I ...
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1answer
61 views

Can't communicate with serial scales

I have a set of serial scales. They communicate at 2400 E 7 2. I have used these scales on many other devices so I know they work. They put out a constant stream of data. The O/S is 64 bit Windows 8.1 ...
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22 views

How to select grub entry via PS2 port?

We want to output the grub entry to serial port and select the grub entry on another machine via serial port. We have two machines. For the machine with built-in serial port, we followed the ...
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69 views

Can I read a serial console over USB (not with an adapter)?

I'm working with a device that provides serial console access via a USB-B port. My workstation is a laptop running Linux Mint 17.1. Previously, I was able to access the serial console from my laptop ...
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120 views

Converting serial port binary hex to serial port ASCII decimal

I'd like to convert a binary hexadecimal data string on one serial port to an ASCII decimal string output to another serial port. Is there already an application that does this? If not, would it be ...
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3answers
494 views

File transfer over a serial port using Windows 8

I am looking for a way to transfer a file over from my Windows 8 computer to a Pandaboard (has OMAP ubuntu on it) using a serial cable. The solution should work in general for any ARM board, so for ...
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1answer
80 views

Why is USB Serial so fast in linux?

I've just started using a 3G modem on a RaspberryPi using the "stock" USB Serial driver from the linux kernel (as indicated in the modem documentation). Once the modem was recognized and appeared as a ...
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1answer
37 views

Xyplex MaxServer 20 Terminal Server

I recently purchased a Xyplex (which was purchased by MRV) MaxServer 1620 terminal server for my CCNA lab so I could manage all of the console connections from a single device.. Well, that was the ...
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53 views

How do I dump every byte written to a tty?

When connecting to a switch over serial (/dev/ttyUSB0) using PuTTY, I'm presented with a login prompt. If I connect using the Python pyserial library and write a few line breaks (\n\n\n) I'm not ...
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Where can I find a serial port cloner for Debian Linux

I have two application that need to share the same serial port, one is for monitoring and the other will actually respond back to what will happen through the physical port. I tried to make use of ...
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110 views

How can I allow two applications access to the same serial port

I need two application to run on the same serial port (/dev/ttyUSB0). One is a read-only monitor, while the other is an application that will read the data on the serial port and respond back. How ...
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Serial Port output history?

Is there a way I can go back and view previous serial sessions I have had? I use cu on ubuntu to open the serial connection. I need to see if I can find a traceback on my cisco router. thanks
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1answer
103 views

How to set up usb-to-serial port on QNX?

How to set up usb-to-serial device in QNX operating system to use it in code like open("/dev/serusb1")? I'm using VMWare to host QNX. How to check if USB adapter is properly connected?
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43 views

Define a USB Device Port on Mac OSX 10.10

I am using a 3D printer app that is not the driver that came with the printer. The advantage of this app is it can utilize a reloaded filament cartridge and ignores the state of the chip. However, it ...
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99 views

How do I Introduce Latency to a Serial Port

I am looking for a way to introduce latency to a serial port. I am using a radio through a USB port and am looking to purposely delay the transmission by some amount of time (hopefully in an easily ...
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155 views

How do I configure Putty to show non-printing Ascii Characters when using a Serial Connection

I am trying to debug communication with a hardware device via serial port. The hardware device will occasionally send out information that is not a alphanumeric or whitespace character. While my ...
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28 views

Serial Connection Issues

I have a Radionics rfid badge reader on my desk which is supposed to interface with our badge software (Stanley PAC) which is installed on my computer. I am using a docking station (also HP) which ...
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1answer
44 views

Simulate a serial port that actually is an internet port [closed]

In CentOS, how do I make a fake USB serial port that is actually an internet port (like port 80 for http)? Edit: I'm sorry that I didn't make it clear. I'm trying to make a server-side compiler and ...
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1answer
124 views

how to open the options window for extraPutty session manager

I'm using ExtraPutty and have also installed 'Putty session manager' the session manager's options window: It appeared once when I first installed the session manager but I only get access to the ...
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Sharing a Serial port between two process with two different configuration in linux

Is it possible to access a serial port with two process at the same time. one for reading serial data and another for writing serial data.For Reading serial data the process should be configured with ...
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50 views

Not able to receive signal from bluetooth module on PC, works on mobile

I am using an IR receiver with a baud rate 9600, which sends signal to a bluetooth module. I am able to see the data which is sent, on a mobile device with a simple BT terminal application. However, ...
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1answer
346 views

wvdial can't retrieve modem response, terminal programs communicate without problems

I'm trying to make a GPRS connection with a SIM800L and a PL2303 USB-Serial cable. If I screen or minicom the modem (at 115200 8N1) I get an immediate response from the modem and I even after setting ...
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1answer
414 views

Portmon - Portmsys.sys not found

I've been wrestling with SysInternals PortMon utility - trying to get it working under Windows 8.1 64-bit. Initially it would not start - it gave "Error 2" and exited, as detailed in this S/O ...
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How to transfer data between RS-422 and RS-485 ports?

I'm relatively new to behaviors of serial ports such as RS-232, RS-422, and RS-485. I'm wondering how do you initiate data transmission between a system and a device connected to each other by one ...
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xmodem communication over serial port via Tera Term is failing

I'm updating the firmware of transmitters over a serial port using Tera Term. For whatever reason, the upload, via xmodem, keeps failing (or timing out or something along those lines) and I'm trying ...
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278 views

Creating a console adapter for an ACME packet server

I am having a hard time with this problem and hoping that someone can help me out. I have an ACME packet 4250 server that needs a console cable to access it. The box itself takes an RJ-45 in the ...
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491 views

What are com ports and why does a PC need them?

As per the title, I'd like to know the purpose of the com ports, since computers have physical USB ports as well. I've searched the web but without any convincing answer.
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1answer
125 views

How to share via TCP serial port CAT

I want to connect my amateur radio transceiver to a linux (Ubuntu) computer with USB cable (serial port (in windows should be COM3 or COM4) like /dev/??? ) and share it locally with TCP, Is it ...
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1answer
240 views

Get minicom to behave like PuTTY

I'm bootstrapping some servers over serial. I've been using PuTTY on Windows, but I'd really rather use Linux. In PuTTY, I can simply select serial and enter the baud rate. A serial window pops up ...
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2answers
98 views

Where to set advanced settings for serial port on linux

I use a special USB to serial adapter to get data from legacy hardware. Under Windows i have to set some advanced settings in order to start sending data in a way the devices can "understand" and ...
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1answer
276 views

Can I use an UART (serial port) as a MIDI device in Linux?

Can I convince Linux (kernel/ALSA/Jack) to use an arbitrary UART or serial port (usually /dev/ttyS* or /dev/ttyUSB* or /dev/ttyACM*) to output the MIDI messages? This is the way MIDI was done on the ...
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Setting up a virtual Com Port?

What I need to get to work together: A USB barcode scanner A Windows (7) Machine A piece of software that listens for data over a COM port So I believe I need a way to make USB device appear to be ...
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263 views

Does socat connects two rs232/COM1/serial ports with null modem cable

I have box A under which two virtual machines B and C are running. Each one of this virtual machines exposes it's COM1/rs232/serial port to machine A as TCP port. The virtual machines are Xen HVM ...
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Why I have /dev/ttyS* on Linux when my laptop have no serial/RS232/COM1 port?

I am running Debian Wheezy and my laptop does not have serial port. Why do I have /dev/ttyS*, and what will happen when I try to read/write to them? My config: └──> ll /dev/ttyS* crw-rw---T 1 ...
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Serial connection to Cisco C40 not taking input

I have a cisco c40 video codec that is not accepting the admin credentials that I established for it over SSH/HTTPS. I suspect that the config file is corrupt as there are other erroneous behaviors in ...
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1answer
2k views

How can I test my serial port in Windows 7?

I installed Windows 7 in my system. I want to test my external serial port. But I can't find Hyper Terminal to test the serial port myself. Is there any alternate method to test it?
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1answer
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Cannot use COM ports under my Linux

I am trying to obtain the COM port for a device but after I connect it, it is suddenly disconnected. I got the minicom package installed, and when I execute dmesg | grep tty I obatin this output: [ ...
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238 views

Receive a file using runscript (minicom scripting language)?

With runscript one can script minicom serial line sessions. I try to script the reception of a file transferred with ymodem. Minicom uses external programs for file transmission. I tried runscript's ...
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126 views

Windows Service unable to detect COM port

We have a windows service (written in C#) that uses a 3rd party DLL to communicate with a COM printer. Already tested the windows service in 4 local machines, and in every case the printer works ...
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Xubuntu: rs232 dropping data

I got a problem that googling did not solve. We have a computer that we use to "forward" rs232 connections. We had Windows 7 running on it and used the Windows Remote Desktop to forward a Putty ...
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“cannot open port!” in a DLL project [closed]

I made a C Console Application in Visual Studio in order to access one of the COM ports with the following code and all went well. #include <windows.h> #include <stdio.h> #include ...