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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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
207 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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1answer
651 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
777 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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1answer
90 views

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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159 views

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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679 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 front....
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4answers
1k 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
159 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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422 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
142 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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2answers
485 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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0answers
450 views

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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2answers
287 views

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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236 views

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
4k 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
21 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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315 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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1answer
307 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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62 views

Make serial gnu-screen send a line at once

Is it possible to send lines at once in linux screen utility, if used as serial terminal, like for example screen /dev/ttyACM0 9600? By default, every character typed is sent immediately, but my ...
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1answer
507 views

RS232 serial Y splitter to Raspberry Pi (USB) and thermal printer sometimes blocks flow to printer

We are sniffing data from a restaurant point of sale system (RJ45 to DB9) to its thermal printer by using an RS232 splitter and a Raspberry Pi (DB9 to USB on the Pi). This has worked great 99% of the ...
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219 views

How to get the IMEI of an usb dongle? [closed]

I'm wondering if there is any open/universal method to get the IMEI of a 3g usb dongle programmatically.
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1answer
374 views

Why would I be unable to type input when using a using serial console in Linux? [closed]

I have a Slackware machine with an RJ45 serial port and I'd like to have a serial console on it. So I have connected it up to another machine running Hyperterminal. I can only get output on the ...
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1answer
619 views

Unable to communicate with peripheral over Serial USB from Linux

I am struggling with establishing comunications with a peripheral over USB serial on my Linux here (fedora 20/64bit), and I am probably missing some step: I connect the device, a /dev/ttyUSBx port ...
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1answer
969 views

Change COM Port Number programmatically

In Device Manager, I can right click on a serial device, navigate to the Port Settings tab, click Advanced, and change the COM Port Number via a drop-down menu. I need to automate this step across a ...
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2answers
2k views

Can't access SerialPort on virtual machine

I'm using VMware Workstation 10.0.4 with a Windows 8.1 64bit as OS on the virtual machine (and the host system). Now I am facing the problem that though the serial port is mapped into the virtual ...
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2answers
672 views

Echo/Pipe command output to Serial line

I have a serial device running on 115200 baud at /dev/ttyUSB0. I need to Pipe the output of a command to it. I Need somthing like: command-that-gives-stdout | command-that-puts-stdin-to-serial --baud ...
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2answers
9k views

How to view serial COM ports but not through Device Manager

How would I go about viewing a list of COM ports in use without the use of Device Manager? I don't want to install any software either. Is there a possible way to do this through the command line?
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45 views

serial port settings for scale model 240878

Has anyone ever have configured the serial port settings for a globalindustrial scale model 240878? I have tried some many configuration already using BC-Wedge but can't get the right value from the ...
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2answers
143 views

Mapping a virtual serial port to a remote serial port

I'm trying to start a multiplayer match on an old game (runs on Dosbox), which uses serial communication. So what I need to do is define virtual comports on both computers running the game, and ...
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1answer
2k views

How to send AT commands to HuaweiE3276 using Putty

i am trying to connect with COM port of Huawei LTE modem E3276 with a java program. To test AT commands i am using Putty as terminal application. Once i give COM port and all other parameters (Baud ...
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Serial TTA0: connection to Virtual machine | Weird characters and no input

I have setup a serial TTA0: connection to an OpenVMS Emulator running in virtual windows. The console serial port is configured as follows: TTA0.type="socket" TTA0.port=":20000" TTA0.stop_process="...
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131 views

How to install Windows 95 from CD-ROM on laptop with no CD drive

I have a old Toshiba T4700CT laptop which I'd like to install Windows 95 on. However I own't Windows 95 on CD-ROM and this laptop only has floppy. I'd prefer not to have to hunt down and pay for a ...
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1answer
388 views

If I plug a two serial devices into usb adapters both into a single USB hub will my computer see two different COM ports?

Hopefully a simple question but I couldn't quite find the answer myself. I'm writing a program in C++ that will, among other things, need to control two devices that are run by serial port. This ...
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1answer
1k views

How to read infrared signals from a IrDA FIR port on Windows 7 (Acer Travelmate 8200)?

I have an Acer Travelmate 8200 notebook with Windows 7. The notebook has a built-in IrDA Fast Infrared Port (on the front panel) which is activated in the BIOS. Windows did auto-detect the IrDA port ...
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2answers
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How can I set the parity bits when using screen to access a serial port

I typically use screen(1) to open a serial port with the command: sudo screen /dev/ttyUSB2 115200 I've tried setting parenb (and a number of other things) using the following command: sudo screen /...
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1answer
2k views

Unable to find PORT name in ubuntu 12.04

I am writing a code for serial programming in ubuntu 12.04. I have connected a usb to serial converter with my usb port. Now I want to know On which port I have connected my usb ( for example COM12 ...
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1answer
148 views

serial port over tcp without terminal server

Using pandboard, i would like to forward the ttyO2 port where first login comes up and gives a bash. Without using a terminal server (intermediate PC or serial-server) as pandaboard support eth0 how ...
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1answer
133 views

Is there a way to identify the device data is being received from? (python)

Summary I have an MT4000 device connected to my computer using the serial port ttyS0. This is broadcasting data which is being received and read by a udp listener written in Python. I am also sending ...
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161 views

Timeout in COM communication

I have a device that connect to computer and communicate with the computer via a COM port. I tested it with 2 different computer. It works properly in Windows-Server 2008, but return timeout in ...
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0answers
1k views

Linux tells me a serial port is in use, but it isn't

On CrunchBang linux (Debian variant), I have a COM port on ttyS0, which I'm trying to use with an NFC device. libnfc responded that it couldn't see any NFC devices, so I tried directly opening the COM ...
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1answer
189 views

Triggering a server to shutdown in receiving a signal via serial port (RS232)

I'm a fresh graduate (Electronics & Commn) and want to start my career in linux administration. I'm using a Ubunutu 14.04 server machine for R&D (with ups). Now my scenario is whenever main ...
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1answer
102 views

Prevent PuTTY from minimizing

I am using PuTTY to monitor a serial port spewing both binary data and ascii data at 1000000 baud. The binary characters are raw uint32_t bytes from sensor values and are essentially random. When ...
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1answer
209 views

Redirect TCP/IP to COM port driver

There are many programs which emulate a COM port and let you redirect it to an ethernet port. I want to do the opposite of that. Create a virtual ethernet port that redirects to a physical COM port. ...
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2answers
606 views

How can USB 3G modems reach high speeds through a virtual serial port?

I'm a bit puzzled about the virtual COM ports used by modern high speeds USB devices that creates several serial interfaces, one of which is used for data transfer. A modern 3G/4G USB modem can reach ...
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1answer
329 views

How to send a BREAK on a serial port from command line in Raspbian Linux?

I am looking for a way to send a serial BREAK from a shell script in the Debian Linux that comes default on a Raspberry PI without needing any additional software to be downloaded or compiled. ...
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1answer
196 views

Output to Serial Port

I am trying to output to an arduino through the serial port in windows using a program called boblight. Basically, I have to tell it where to output. I have tried "COM3", "dev/com3", and "dev/ttyS3". ...
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2k views

Impersonate a serial device with socat

I am trying to use socat to impersonate an external serial device. If I do this in one terminal: sudo socat -ddd -ddd PTY,raw,link=/dev/ttyS32,echo=0 READLINE and run this simplified version of my ...
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327 views

Unable to send/receive from microcontroller virtual serial port

I have a MSP430 Launchpad (microcontroller) which forms a virtual serial port on my Windows 8.1 rig. Somehow I cannot receive/send any data through this serial port on this rig. I have tried 2 other ...
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1answer
13k views

How to transmit single Hex value serial data in Putty using alt code?

I am trying to sent a specific hex value across a serial COM port using Putty. Specifically, I want to send the hex codes 9C, B6, FC, and 8B. I have looked up the alt codes for these and they are ...