Questions tagged [serial-port]

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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Minicom spamming the output in reading serial port

When I'm reading the output of a serial-usb converter using minicom 2.9 (let's say /dev/ttyUSB0), from time to time the output of minicom gets spammed with ...Minicom2.9Minicom2.9Minicom2.9... ...
mehdi's user avatar
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Is it possible to pass PCI express data signals via an express card USB 3.0 adapter?

I have a Magideal Dual Ports HUB PCI-E USB 3.0 Express Card Adapter that I use as a PCIe to USB 3.0 adapter. I want to connect an external GPU (as a PCI express device) via a USB 3.0 cable which only ...
Fuad's user avatar
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"Duplicate" serial device - read/write from 2 processes

I have a serial/rs485 converter to read/write from a Modbus device. I have the need to be able to read and write from 2 process. How can i "copy" the real device /dev/ttyUSB0 to specify in ...
Marc's user avatar
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(C-)Kermit suddenly stopped working on Windows 10

I've been using (C-)Kermit for decades to communicate with my various HP48GXs. My current setup as regards the environment in which I run (C-)Kermit is primarily on a Linux Mint Vera 21.1 Cinnamon 64-...
jdb2's user avatar
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How to use a serial attached GPS device with geoclue and PureMaps?

I have a serial attached GPS device on my Raspberry Pi 4 running the current 64Bit distro. I want to use PureMaps to navigate. PureMaps is not detecting any directions and in the C++ files it seems ...
karlo922's user avatar
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Virtual (USB) COM ports on Windows 11 Home (Surface)

I have a device which communicates via emulated serial over a USB A/B (USB-B at the device itself, USB-A into a host computer). I have used it successfully on a Windows 10 laptop, but I also want to ...
Zenilogix's user avatar
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Converting USB traffic to Ethernet to avoid a long cable run

I have an industrial computer cabinet ("near cabinet") to which Ethernet cable has already been run. Because of an oversight in the design of the system, a proprietary interface module that ...
cncmang's user avatar
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Cannot configure serial monitor in Visual Studio on Windows 10 - why are ports not listed?

Docs says after opening the serial port monitor (Debug -> Windows -> Serial Monitor) in VS community 2022 64bit Version 17.6.5, there should be a list to select the port. I do not get this. I ...
Charles Bisbee's user avatar
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Application under Wine cannot access any serial ports?

I'm trying to run this program under Wine (that's programming software for a Kenwood TM-V71 radio). The software installs and runs without a problem, but when it comes time to select a serial port ...
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High "System interrupt" CPU % in Windows 10 Task manager, linked to ACPI.sys, if and only if a serial port device is connected

I see a 20% "System interrupt" CPU usage in the Windows 10 task manager if and only if a device is connected to the PC with serial port. With the "LatencyMon" tool, I can see this ...
Basj's user avatar
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Linux serial console works with earlyprintk=ttyS1, but not with console=ttyS1

I have a server with its secondary UART (ttyS1) connected via USB to a laptop (at /dev/ttyUSB10). If I boot Linux on the server with console=ttyS1,115200n8 earlyprintk=ttyS1,115200n8 I can see the ...
Karim Manaouil's user avatar
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1 answer
1k views

Windows 10 RS232 Serial Communications

I have an application that uses RS232 communication to communicate to another device. This application works fine on Windows 7 machine. I have the same application installed on Windows 10, the ...
StixO's user avatar
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Downloaded a FTDI virtual com port driver for windows 10/11 to set up a go board for fpga learning, but I can't access the port on tera term or DM

I tried updating drivers and changing three different cables (micro USB cable), I tried doing the same thing to my other laptop, but no luck. I also tried going back to Windows 10, enabling hidden ...
user1745262's user avatar
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Minicom enable echo by default and set color for local echo

To enable the echo with Minicom I use the combination Ctrl+A E, I was wondering if there is a way to activate the echo automatically without having to use this key combination every time? Also is ...
Parminder Singh's user avatar
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3 answers
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esptool.py PermissionError while configuring serial port

esptool.py v3.0 Serial port COM11 A fatal esptool.py error occurred: Cannot configure port, something went wrong. Original message: PermissionError(13, 'A device attached to the system is not ...
Mukul MBR's user avatar
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3 answers
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How do I enable serial access to a computer (not from a computer)?

I have a Linux server (on Desktop hw) running Ubuntu Server (headless). Its tucked away and hard to access, once a year an update or something else create a problem where I can no longer ssh into it. ...
Duxa's user avatar
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How to have one process listen to a serial port that another process is writing to?

I have a process (in bash) that writes data to a serial port. I would like to see that data, but instead of hooking up an Arduino and showing the data on a display, I thought it would be easier to ...
OZ1SEJ's user avatar
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1 answer
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How to connect to a computer with db25 without screen?

I have and old computer and I need to install Ubuntu server on it but I don't have a VGA monitor, what I do have is access to a db25 to usb cable and a laptop with SSH client. Is there any way I can ...
Omar Morales Rivera's user avatar
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RS232 cannot be discovered as /dev/ttyS* or /dev/ttyUSB* on ubuntu of wsl 2

I'm having problem to get serial connection using RS232 (to USB) and picocom of wsl. From Windows I can see that my RS232 is using COM24 and from lsub on wsl I can also see my RS232. However, if I do ...
rnels12's user avatar
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Is it it possible to send an A/V receiver commands via a USB cable to a 3.5mm jack on the receiver? [closed]

I have a Linux computer (Ubuntu 20.04.5) and a Harman Kardon AVR51 A/V receiver which has a 3.5mm input jack for IR remote control. My question is, if it is possible to send some kind of command from ...
tapinko's user avatar
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Does anyone know how to receive data from a 1d barcode scanner?

I am using a yhd-M300C 1D barcode scanner, it connects by a usb cable but it comes with no drivers so the computer doesn't recognize it. I am using Ubuntu 22.04 The scanner comes with a bunch of code ...
frend123123's user avatar
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Putty setting for different colors of text transmitted and received

I'm using Putty as a terminal emulator to control some equipment. The protocol is to send a command and receive a reply, each terminated by a CR/LF. The format of the command and reply are nearly ...
gnuarm's user avatar
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Piping data from ethernet to serial and back to ethernet doesn't work

CONCEPT VISUALIZED I'm trying to establish a bidirectional communication where ethernet UDP packets enter a linux system (suppose a Raspberry pi) from eth0 interface and piped into the UART hardware ...
zanglorion's user avatar
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154 views

Which Linux rescue disk has out the box serial console support?

We have a RHEL8 machine in a different city that needs to be rescued. The machine is connected to a serial console, and we can successfully access the BIOS and choose a disk to boot from. Our problem ...
Graham Leggett's user avatar
1 vote
1 answer
548 views

Terminal server for accessing serial consoles behind USB FDTI-based interfaces

I've long used terminal servers (like this) to access the serial consoles of various devices like switches and routers. These terminal servers can be configured to make a serial console available over ...
teego1967's user avatar
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An application on a computer emits data to a COM port. What are my options to read this data on a different computer?

An external system (not ours) can be configured to emit serial data to a COM port on a Windows computer. What we want to do is read the data on another computer. This computer only has USB ports ...
birgersp's user avatar
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Minicom showing garbage characters

I am developing a program for an IP camera and when I tried connecting my device's serial console through minicom, I got the following prints. ~ # ls ...
Thilak's user avatar
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Overflow from serial port in Wine/Virtualbox?

I'm trying to read the data saved on a minimax B4 sensor connected to my Ubuntu 20.04 machine using a serial port via USB (mounted as /dev/ttyACM0). The program reading the data is an old Windows one ...
Giangiacomo's user avatar
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0 answers
720 views

How to create a serial over LAN server under Linux, using virtual ports

I am able to connect to serial over LAN devices (like USRIOT-TCP-232-302), as client, from my linux server, using socat and it works pretty well. I now would like to have devices connecting to the ...
Cedric Simon's user avatar
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0 answers
142 views

Attempting to tap a serial connection between hardware and software, but application takes control over the serial port

We're trying to monitor the serial messages sent/recieved between a hardware device and a piece of software, however when trying to monitor the device, the software is taking control of the port and ...
HPringles's user avatar
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0 answers
717 views

WSL2 causing COM ports on Windows 11 to act weird

I'm experiencing some very, very weird things with my serial ports. I own a few tools that I use for various things, such as measuring the power of a device (using a tool called Power Profiler Kit II)....
MortenMoulder's user avatar
1 vote
1 answer
1k views

Can't change baud rate of ttyUSB0 in Ubuntu 18.04 (galiumos)

I wasn't able to use an app with the diagnostic interface until I changed ttyUSB0 baud rate to 9600 with the command : sudo stty -F /dev/ttyUSB0 9600 and after restarting app it wasn't working again ...
cookiebuntu2406's user avatar
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1 answer
2k views

Where can I find a TeraTerm User Guide?

I am using TeraTerm for terminal emulation. I'd like to create a link on my Win10 desktop, to start TT with specific connection params for a COM port. As a reference, I have command lines that open a ...
ysap's user avatar
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1 vote
1 answer
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Windows 10 Bluetooth virtual serial comm port is missing

Question: How to get linked Bluetooth serial Commport installed? For communication a serial comm port is needed. But on some computers, mainly workstations, there is no linked Bluetooth "COM &...
Tib Schott's user avatar
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2 answers
1k views

Why some USB Serial converters work and others don't on specific hardware?

I went online and brought a pack of the cheapest USB to Serial adaptor, put TX on RX and RX on TX and was able to communicate between the 2 ports without any issue. So I plug the thing in a device ...
Guilherme Richter's user avatar
1 vote
1 answer
432 views

Force bash as shell used for serial console login

I am running Ubuntu Server 20.04 headlessly, and typically remote into it via SSH. However, it is also connected via serial RS232 to a terminal server (a Digi CM 16) for kernel console logging and as ...
staehle's user avatar
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How to determine which physical port is connected to which tty path?

I have a device (An NVIDIA Jetson Nano) with four USB ports. How can I tell which /dev/tty* locations are mapped to each of these? I have gone through many similar questions here and on askUbuntu. I ...
Timothy Kleinow's user avatar
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1 answer
559 views

Conecting a controller's RJ45 port to laptop's USB port

I have a CNC controller that uses RJ45 socket as a input for reciving instructions from my laptop. I use a USB to RS232 adapter and then RS232 to RJ45 adapter to finally connect my controller using a ...
Oskar's user avatar
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1 answer
247 views

How to install Drivers in Linux

I had fixed a new serial port to my workstation and following the instructions to install the driver for that card, the instructions says: <1>-copy pci60806a.o to /usr/sbin <2>-Add /usr/...
Firas Alrawi's user avatar
2 votes
1 answer
556 views

zmodem crashing with large files over TCP

I'm attempting to send files to a Raspberry Pi Compute Module 3+ from a Windows 10 PC using a UART-WiFi bridge; the Pi is connected to the UART side, the PC connects to the bridge via WiFi. The bridge ...
Isaac Middlemiss's user avatar
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518 views

If SMB can share serial ports, does that apply to USB Ports as well?

I was just taking a course and they said something I never heard of, that serial ports can be shared over SMB. That sounded kind of strange to me, but I guess I've never had a need to share a serial ...
leeand00's user avatar
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socat resetting USB port on open

I'm having an issue with socat, and it is probably just in my environment. I need to have a USB serial port redirected to a TCP port. I use the following and it works perfectly: socat TCP-LISTEN:4444,...
Andy's user avatar
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1 answer
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Putty cannot register anything i type in, serial connection issue

I'm having trouble using putty to set up a serial connection using my 16 port GSM modem. I am using the correct baud rate, data bits and stop bits for my modem. Just for reference I connected my GSM ...
tomtom2021's user avatar
1 vote
2 answers
2k views

Mirroring USB data to multiple computers/hosts simultaneously

I want to mirror the data sent to (and/or from) a USB device to multiple host computers at the same time (i.e no physical switches to select one host or the other). Here are two scenarios to describe ...
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2 answers
117 views

Configuring Workstation For Serial Port Communication

I am trying to access the Siemens RuggedComm 900W ROS (operating system associated with the Ethernet switch) by establishing a serial port connection. I have followed the instructions described in the ...
logic_bomb_walter's user avatar
1 vote
1 answer
710 views

Is there a way to know which USB device file (/dev/ttyUSB0) is related to a particular interface (wwan0)

The title pretty much says it all, but here is my scenario in case it's relevant: I'm trying to automate bringing a USB modem online when it's first plugged in. With my hardware and cellular service, ...
DaiBu's user avatar
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1 vote
2 answers
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How to fix strange usb serial problems in windows 10?

I have several issues with serial ports in windows 10. The first one is "ie_Open - device already open" in real term, but I also can't open the port in any program. Even uninstalling the ...
Voltage Spike's user avatar
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282 views

How to route all Ethernet traffic to a Serial port on a Linux system?

How can I route all Ethernet traffic on a Linux system to a Serial port and the opposite? I want to convert from the first architecture to the second one, as shown in the picture: picture I monitored ...
BrainTrance's user avatar
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0 answers
1k views

Different serial ports get the same COM identifier in Windows

We're using Windows 10 for testing several different devices, connected to several USB hubs. Some of these have the same VID/PID, some different. There are a lot of devices being plugged in and out, ...
chwi's user avatar
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4 votes
4 answers
8k views

Windows 10: Two serial USB devices were given an identical port number

We are developing a desktop application under Windows 10 x64 v2004 to control virtual USB COM ports where the devices will be connected/disconnected several times during operation: While connecting ...
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