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 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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1answer
111 views

Avoid USB/Serial adapter port change in Windows enviroment

I would like to know if there is some way to "fix" a serial port to common usb/serial adapters. Many times I saw that changing usb port of adapter it takes a new serial port number. It happends also ...
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13 views

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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16 views

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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1answer
2k views

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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1answer
3k views

Wrong newline character over serial port (CR instead of LF)

I'm trying to talk to a device using a usb-to-serial converter on linux. Drivers are working, the device exists at /dev/ttyUSB0. There is a strange problem (checked with a null-modem cable to another ...
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1answer
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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17 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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3answers
5k 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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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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264 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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1answer
42 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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2answers
800 views

Use Serial Port as Digital Out

I want to 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 ...
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1answer
201 views

“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 ...
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1answer
19 views

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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124 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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1answer
41 views

COM port forwarding software [closed]

I need to find software to redirect COM port from PC with device to remote server (over ethernet). But first: connection must be initialized by client to server (from PC with device), and second: ...
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1answer
88 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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13 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
4k views

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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2answers
133 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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7answers
62k 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
101 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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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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118 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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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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1answer
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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2answers
5k views

Redirect serial com to tcp port

I would like to know if exists some utility that connects to serial port and redirect input and output to a tcp port. I need this for a Java application, I need to write and read to a serial port but ...
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0answers
66 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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3answers
443 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
79 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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1answer
344 views

netcat command is not working in bidirectional mode

I am using netcat in Linux to send and receive data (using udp protocol) from a serial port to another device through the network. The command is : nc -u 192.168.10.12 < /dev/ttyUSB0 > ...
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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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1answer
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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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0answers
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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1answer
307 views

How to make a Terminal (running in an Atari ST emulator on a 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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17 views

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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3answers
4k views

What's the simplest (free) way to share a serial port over an ethernet link? [closed]

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 ...
5
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1answer
899 views

Local echo using Screen to connect to a serial terminal

Reading through the book "Building Wireless Sensor Networks" I learned that you can use the Screen utility to attach to a serial console. I tried using it to connect to an XBee module and it seemed ...
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3answers
451 views

Piping from serial port on Mac OS X

I have a USB to RS232 adapter with which I'm connecting my MacBook Pro (OS X 10.9) to an EVK1100 board from Atmel. The program on the board outputs a lot of information on the serial port and I'd like ...
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14 views

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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42 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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1answer
123 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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0answers
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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0answers
149 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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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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15 views

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
340 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 ...