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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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Devices from USB hubs caused motherboard to fry [closed]

I have limited info as I'm not present at site but I have 2 powered USB hubs with 32 RS232 devices connected total. They said they connected the devices and it logged them out for some apparent reason ...
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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 ...
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Windows 11 cannot connect to a host-pipe serial port

Using VirtualBox 6.1.32 with a Windows 11 host and a FreeBSD guest, with this serial port configuration: The guest starts up fine, but the host - when attempting to connect via PuTTY: fails with ...
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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)....
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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 ...
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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 ...
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USB WakeUp with CDC ACM

I'm aware I can wakeup a PC from a HID USB device (i.e. keyboard) if the BIOS support this feature. I wonder if this is also possible with a CDC ACM device, like an Arduino board that create this &...
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Windows 10 Lots of Serial Port in use, Arduino UNO with CH340 Stopped Enumerating Through Hub

I have been using several Arduino UNO boards. The com ports enumerate as USB-Serial CH340. I had one stop responding to it's enumerated port of COM15. It is connected through a times 7 hub. I moved it ...
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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 &...
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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 ...
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Is it possible to initialize a function key, say F2, to run a program.exe and use that within say, Putty?

I need to run a .EXE file whilst Putty is loaded that will download a .OBJ file to the port (COM3) associated with Putty. Is this possible? Thanks
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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 ...
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Can I simulate the physical activation of an AUX port on a Windows laptop?

This is a little bit of a strange request. I have a bug with my Realtek audio driver and it's fully up to date - I can't figure out any solution apart from repeatedly uninstalling and reinstalling the ...
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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 ...
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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 ...
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Sharing serial port via Internet

I have Linux machine connected to serial device and remote Windows machine that runs application that uses serial port. I'm planning to share Linux serial port with help of ser2net service that ...
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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/...
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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 ...
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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 ...
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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,...
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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 ...
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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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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 ...
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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, ...
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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 ...
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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 ...
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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, ...
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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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Why does insmod of a driver generate a ttyF device?

I've recently had the case of compilating a driver for a PCIe to Serial Adapter. (more specifically, the AX99100 chipset on that card) For a quick test, I didn't really install the driver, but just ...
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Serial port incompatible with monitor

This question is similar to: Will a VGA monitor work if connected to 9-pin serial port? Can this workstation be used with modern serial monitors? The blue serial port has a box with "10101" ...
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What do IRQ, RTS, DTR & DSR mean here?

Got the below output on my linux. What do TX, RX, IRQ, RTS, DTR, DSR mean here in this context. I have read about Data Terminal Ready & Request to Send, but need help in understanding them in the ...
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Logilink RS232c USB-to-Serial converter software

I have a device with RS232 that works with a PCI board, however when I install a Logilink USB-to-Serial converter, I stop receiving data from my device. How do I resolve this? PCI Board configuration:...
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USB to COM for WIndows XP

Basically, I recently purchased a customer display for my EPOS till which runs on Windows XP (Yes I know XP Is old but it is running some legacy software). Anyways, in the Epson OPOS my display ...
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COM ports not refreshed after editing registry

I have a couple of FTDI devices that I need to change the COM port names of; following: https://www.ftdichip.com/Support/Documents/AppNotes/AN_132_Re-Assigning_COM_Port_Numbers_Using_Registry.pdf ...
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How to view logs in uboot?

I have a linux device running U-Boot and booting Ubuntu Core 18 that is having problems with its serial interface and networking. Because of these problems, I can't configure it via ssh or minicom. I ...
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COM port in Windows 10

I understand that the COM port is a serial communication port inside a computer. But in my windows 10 laptop, I don't see any COM port connected. If I go to the control panel -> Device manager, I ...
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Bash read line from ttyUSB gives sometimes corrupted characters

I want to read line by line from external device (ttyUSB) over serial on my Ubuntu PC. I have following script: while true; do read line < /dev/ttyUSB0 echo $line done The problem is ...
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How Serial Port Loop Back Test work internally/underneath?

When doing a Serial Loopback Test on a USB Port (assume COM1) using Hyperterminal, you can verify that the test passed if what you type on the keyboard is displayed on the Terminal (although it's not ...
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Modern Intel CPUs serial communication

I have Intel X299 Chipset system that runs a linux system that prints boot log to the serial port, How can I connect to the serial port and read the data? modern motherboards doesn't have RS232 input. ...
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How to keep a device at a fixed Comport when removing and inserting

No serial I/O isn't dead :) The example I am going to use is a GPS device on a Windows computer. When you put a GPS locator on a computer it, as a rule, comes in to Device Manager as a COM Port. All ...
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STLink V2 VCP doesn't show up in Windows

I'm trying to get myself situated to program comfortably with my STM32 Blue Pill and STLink V2 USB interface. However, I've run into an issue when trying to gain access to the VCP (Virtual COM Port) ...
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How to share local PC com port to vps?

I have created an application that use a usb gsm modem. I want to try to run my application in my vps and connect it with the gsm modem in my local PC. My questions is: - How to share local PC com ...
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3 votes
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Using ZModem inside command-line on Windows for file transfer over Serial

I need to transfer large files from Windows to an embedded Linux system over Serial port. People seems to be recommending ZModem to do this task. Using TeraTerm's file transfer feature, I was able to ...
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multiple physical USB conectors, single COM port?

I want to run a bunch of arduinos off a single computer, but I want all the arduinos to be in the same COM port. I don't mean having all of them plugged into a USB hub, I mean each different arduino ...
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How to disable PuTTY to not sending CR at the end of the buffer? [duplicate]

When I send something through PuTTY serial port I receive what I've wrote and an extra character, including a CR. Is a problem because it hasn't happened until now that I've started to use this ...
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Mikrotik Serial Port Error "failure: port's channel is already in use"

Problem: When trying to change the settings on the MikroTik's (RB4011) serial port, the following error was received: "failure: port's channel is already in use" This error was received despite no ...
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Get data to go through USB to Serial Port of Digi One SP Device

Basic problem: I bought a "Digi One SP" device to attempt to connect a USB input to a TCP output. The Digi One SP has 3 ports: power, ethernet, and DB9 serial (Image 1). It also has a "Digi One SP ...
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Use USB port as serial comms to PC for STM32-NucleoF411 on Win10

I have a STM32 Nucleo-F411RE that I am using with WIN 10, 64 bit. I'm able to program it and everything OK. But I want to be able to use the usb port that I use for debugging so that I can just ...
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Virtualbox and Serial Port permissions for Windows10

I am using Windows10[HostOS]. I wanna create a virtual environment(windows7[GuestOS]) on Oracle VirtualBox(Ver5.2.18 r124319). However, I get the following error. How can I check this permission? [...
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Send AT commands via serial port using bash script on minimal linux

I need to init, with AT commands, a mobile modem without external libraries using only bash on minimal BusyBox. The mobile modem is on a serial port. It s working well with python but in case of ...
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