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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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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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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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 ...
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libftdi disconnects ttyUSB0

After rebooting, my USB device connects fine. $ dmesg -T | grep tty [Sun May 25 10:14:43 2014] console [tty0] enabled [Sun May 25 10:14:43 2014] 00:05: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = ...
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79 views

FT232 USB-Serial not usable with deamon

I am trying to use an USB-Serial converter with a program (a deamon) that is launched at startup on a embedded board (Odroid-XU). The deamon does not work since it fails to open the serial port ...
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Problems sending data over serial port with PuTTY

I am using version 0.63 on Windows 7 x64 in a corporate domain environment. I have an enduser that is programming a bluetooth module over a serial connection. He is using a USB to Serial and we had ...
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157 views

Configure PL2303-based USB-to-RS232 adapter to stay awake when no active device is present

I am resurrecting some X10 devices with the aid of a USB-to-RS232 adapter. The problem is, that the adapter only works with the Firecracker device when there is another serial device on the line (the ...
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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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212 views

USB to Serial driver for windows

When I connect ingenico terminal with USB cable to my windows 7 laptop, there is new COM port in device manager and I can use it. Properties show that serial port uses sagem monetel driver. I do not ...
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Is there any reason to use serial port over parrallel port

Serial Port : Serial communication takes place asynchronously, meaning that no synchronization signal (or clock) is required: the data may be sent at random intervals. In return, the peripheral must ...
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62 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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Is there a device with multiple serial ports to configure multiple devices

Is there a device that has multiple serial ports that I can connect to my computer so that I can connect other networking devices that can be configured from the serial port to this device and then ...
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126 views

Can COM ports be used as RS232 serial ports?

Appologies if I am misusing/abusing specifications. Question: Is it possible to send serial signals via the PC's COM port? Is it further possible to split this port somehow and send signals to two ...
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1answer
1k 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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231 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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341 views

How to send characters to a virtual serial port in Windows 8.1

Microsoft is very unhelpful, as per this link. However one method is the command: echo abcdefghijklmnopqrstuvwxyz > COM3 And as per a question here here, another option is: SerialSend ...
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Ubuntu: Write to serial port: permission denied

I've connected a USB to Serial bridge dongle, and running dmesg | grep tty outputted the following: [ 0.000000] console [tty0] enabled [603199.380677] usb 2-2: cp210x converter now attached to ...
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777 views

Serial PCIE not detected?

I have a "Moschip PCIe 9922 Multi-I/O Controller" 2x serial PCI-E card that I'm trying to get working on Ubuntu 13.04. lspci shows the controllers fine, but "dmesg | grep tty" isn't showing them. $ ...
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170 views

Check which com port my device uses?

I have a device hooked up to the USB connector and within it's software i have to choose which com port it uses. With Windows XP i would go to the device manager and go to com devices/ports where it ...
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1answer
26 views

how to skip Hyperterminal splash page (spinning globe)

Is there a secret trick to skipping the 5 second animated splash screen when Hilgraeve HYPERTERMINAL starts? When I open HyperTerminal (HyperTrm.exe), I want it to open immediately, and not show me ...
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1answer
405 views

Sending Linux commands over serial connection to an Android device

I have a question about being able to send Linux commands over a serial connection to an Android device. I have heard of PuTTY and tried to use it, but I am ultimately lost with it. I was in the ...
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Serial Terminal with custom colors

Looked around but I can't seem to find a serial terminal program that has ability to custom color lines according to certain symbols found in received lines. For example I would like to see 'ERROR: ...
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Serial Port not able to communicate with device with all versions of windows

I have a piece of hardware that communicates over a serial connection. On a windows 7 machine everything works fine. When I try from a windows XP or Server 2008 R2 I am unable to get any response. ...
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464 views

Usb to Serial RS232 adapter with full handshake/flowcontrol support

I need a usb to serial RS232 DB9 adapter to connect a printer. I bought an adapter with a very common-used Prolific PL2303XHD chip, but I have many many troubles with flowcontrol. I tried to switch to ...
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201 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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Bluescreen when Putty reads from serial port

I already got two bluescreens this morning when running Putty (Version 0.63.0.0, which is the newest version as far as I can tell). I have a microcontroller that sends data to a serial->usb converter. ...
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How to create a simple computer interface that senses toggling of a switch?

I want to build a simple computer interfacing system. The use case is: A user will press a switch that is connected to a computer through a serial port (or any other means, I don't care) and a running ...
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414 views

Editing Kernel configuration file

I'm trying to compile uplcom driver for Ubuntu 12.04 for USB support of PL-2303HX serial adaptor using the following link. http://manpages.ubuntu.com/manpages/jaunty/man4/uplcom.4freebsd.html But, ...
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How to fix the COM port name for USB serial port in Windows 7?

I am using USB-to-Serial port adapter in Windows 7 notebook. The model as seen in Control Panel > Hardware and Sound > Devices and Printers is named as Profilic USB-to-Serial Comm Port. When ...
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653 views

How to disable logging to serial terminal - embedded linux

I have an embedded device running embedded linux and I connect to it using a serial port. I am capturing the logs I need using cat proc/kmsg into a file in a background process. I would like to not ...
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Full buffer serial printer

I have a Zebra GK420 printer connected with a serial cable. It works for few labels jobs but if I send many many labels I get a "Full buffer error". I tought it can be the host handshake than I ...
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300 views

TCP > COM1 for receiving messages and displaying on POS display pole

I currently have a Java Applet running on my web page that communicates to a display pole via COM1. However since the Java update I can no longer run self-signed Java Applets and I figure it would ...
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Installation VT220 terminal in Ubuntu

I want to know how to connect a Digital VT220 terminal to PC-Linux with Ubuntu 12.04 using a serial-USB device. At the moment I did next steps: sudo vi ttyS1.conf (at /etc/init) # ttyS1 - getty ...
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270 views

Connect a VFD display RS232 serial port

I need to connect a VSF display to a computer. The VSF datasheet has this pin out specifications (http://www.noritake-itron.com/Specs/CUK/CU2x20029SCPB-KV91B-04.pdf) DIN-Receive EIN-Host Busy ...
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Sending number over serial to arduino sending something different?

I have an arduino setup that turns on a light when it receives a 1, and turns off a light when it receives a 0. I don't think there is anything wrong with the code. I can send the Arduino a 1 with ...
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290 views

What does the “Bits per second” option in COM5 Properties tab indicate?

This is related to my Internet's modem. By default Bits per second were set to 7200. I changed it to 128000. Would it affect or increase my internet speed in any way? What do the Bits per second ...
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Connect 2 Win 7 PCs via RS-232 DB9 serial cable

Is it possible to connect 2 windows 7 PCs directly(Direct cable connection) via RS-232 DB9 serial cable? I tried looping data back to the same PC by shorting pins 2 and 3 with a jumper and used ...
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Serial port sniffer / monitor / logger software for Windows 7, 64-bit?

Question edited. Need to understand the serial communication protocol between a USB device and PC, that uses serial over USB communication. I was planning on using a software based approach for ...
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Converting the /dev/ttyUSB to com ports in linux

I have some software which runs on windows. I installed wine and ran it in linux. It works fine but the issue is it communicates with a serial port. Therefore the only option I can choose are ...
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81 views

udev rules with a math expression

I have a udev rule that creates a symlink for serial devices (USB serial ports) using an expression like this: SYMLINK+="MyDevice_%n". The %n assigns the system device node number starting with 0. Is ...
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Generic text printer / print job status

I've a serial text only printer attached to a machine with Win XP and am using Generic text only printer driver to print jobs. The printer prints jobs properly when it's ON. When it is OFF, the ...
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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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1answer
479 views

Connect COM1 port with socat

Is it possible to connect socat to the COM1 device? I am trying to use example from socat man page socat -,raw,echo=0,escape=0x0f /dev/ttyS0,raw,echo=0,crnl and replace device name /dev/ttyS0 with ...
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98 views

How to view properties of an open serial connection?

How can I view which properties an open serial connection has? So the baud, start and stop bits, the parity, the number of data bits and especially how the to be transmitted string is terminated (line ...
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370 views

Delete virtual serial ports in Windows XP

In my registry file HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\SERIALCOMM there are 14 ports that I want to delete – \Device\VCom11 to \Device\VCom24. I deleted the ports with Registry Editor but after ...
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Overheat alert warning on CPU through Serial port

Is there any way to make an external alarm go off if your CPU reaches a certain temperature using your serial port? I over-clocked my processor and I get warnings if it reaches a certain temperature, ...
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How can I set the power on default state of serial port on Windows 7?

How can I set the DTR line to high by default when a Windows 7 machine starts up? Background: My own Windows service sets the condition of the com port lines to indicate its status. One of these is ...
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How can I access putty from linux terminal?

I'm trying to configure my cisco 2950 switch and I need to use putty on linux. Im not used to using linux but I've been told that putty is built in to linux terminal. I have my serial console cable ...
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233 views

How to quickly determine which process (if any) listens to a serial port

I am looking for a command to see the process listening to a port, e.g. /dev/ttyS0 (with root rights on a Linux system). I can do that with lsof /dev/ttyS0 but this is really too slow. Also, I ...
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Determining if I need a 32 bit or 64 bit driver for OSX 10.7.2

I'm looking to download an ftdi driver for OSX 10.7.2. I will be using it for work I'm doing in python 2.7.x, using pySerial. I have no idea how to determine whether I need to download the 32 or ...