Super User
Super User

Questions tagged [serial]

Serial stands for doing things sequentially, one bit at a time.

Serial stands for doing things sequentially, one bit at a time; as opposed to doing things in parallel. In computers it is usually used for serial communications (e.g. via a RS232 port or via USB). Other uses of serial communication as USB and PCI-e. (Each x1 lane is a serial link).

191 questions
60
votes
12 answers

How do I Connect a 30yr-old Tandy 1400LT laptop to the internet?

Just for the fun of it, I want to get an old Tandy 1400LT laptop: NEC V20 (Intel 8088 equivalent) 640 KB RAM 9'' CGA backlit monochrome display two 3,5'' 720KB DD floppy drives RS-232C serial port (DB-9 M) Centronics port parallel (DB-25 F) I…
Clemens Bergmann
  • 711
24
votes
5 answers

Why are USB ports sometimes referred to as serial ports and called COM?

As far as my understanding of computer ports goes, A serial port is a 9 pin plug such as the one showed here and it is also called a COM port. USB ports are a different standard from serial ports. Why then do I often see USB ports called "serial…
mickkk
  • 975
21
votes
6 answers

Is there a distinct advantage that a PS2 port has over a serial/USB port?

Silly question perhaps ... I'm told that PS2 technology dates back to the early 1990's or thereabouts. By and large, motherboard manufacturers still support PS2 technology/ports instead of providing an additional couple of USB ports for keyboard and…
Everyone
  • 1,862
11
votes
2 answers

Display Hex in PuTTY for Serial

Does anyone know if there is a way to get PuTTY to show the hex values of what it's receiving over a serial connection instead of characters?
Präriewolf
  • 247
11
votes
3 answers

screen a serial get could not find a PTY Error

I insert the serial-USB convertor into my Mac. and under the /dev I find the tty.wchusbserial1410. but when I use screen to connect it: screen /dev/tty.wchusbserial1410 9600 there get error: Sorry, could not find a PTY.
aircraft
  • 890
  • 1
  • 9
  • 28
10
votes
1 answer

Sharing a serial port between two processes

As it is not possible to directly share a serial port between two processes using Linux, I am looking for another way to achieve this, I have heard about socat but could not find a concrete example of how to realize the following: Split one physical…
peterrus
  • 203
8
votes
4 answers

Using an Rj45 to D9 RS232 Adaptor with a laptop to control an RS232 device

I've got an RJ45 to D9 RS232 Adapter that I want to use to control an RS232 device in the following config: Laptop RJ45 Ethernet port -> Cat6 patch lead -> D9 RS232 adapter -> RS232 Device Would the above work ?
sam
  • 4,359
7
votes
2 answers

How to set up a reverse Telnet on Mac OS X

I am trying to set up a reverse Telnet (Telnet to COM) on Mac OS X 10.9.5 (Mavericks). The Mac is connected to a serial device. I have no problem accessing the serial device from the Mac using screen: screen /dev/cu.USBserial However, I would like…
some user
  • 2,846
7
votes
2 answers

how to reset /dev/ttyS0

I'm trying to connect to a Khepera robot using serial interface (running Scientific Linux 6.1) I used the command screen /dev/ttyS0 to communicate which worked OK, but then I wanted to close it and use MATLAB, but I found no way to close that…
hyperknot
  • 952
6
votes
6 answers

Laptop with internal serial port in 2009 (and 2010)

Are there any computer vendors (like Dell, Lenovo, or..) that still sell laptops with an internal serial port? We are using several modem and other kind of box at work that have to be used (and/or programmed) with serial port (RS232, DB9, ..). We…
Vincent Demeester
  • 173
5
votes
2 answers

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 occasionally sends out information that is not an alphanumeric or whitespace character. While my Python program sees every non-printing character that the…
user3346931
  • 289
5
votes
2 answers

Is serial RJ45 to USB a standard?

I can't find any resellers here in Sweden for the RJ45 to USB cable from Current Cost. Are such RJ45 to USB cables covered by a standard so that I could buy one from another vendor? It would also be great to know if it works in Linux / Ubuntu. It…
Jonas Elfström
  • 225
5
votes
4 answers

Why is my modified ISO not bootable?

I am trying to install an OS via console. This means modifying the ISO file for the OS. I unpacked it, edited the grub.cfg file i.e. just the section that is relevant, I left all other sections alone: menuentry "Install Ubuntu Server" { set…
Xoteric
  • 151
5
votes
1 answer

Is there a way to run rsync over a USB / serial connection through a terminal program.

I want to keep two directories in sync between my laptop (Ubuntu) and my PocketCHIP (Debian) which connects over USB serial. I use cu to log in to the PocketCHIP, but is there a way to rsync between them (without being on a network)
interstar
  • 853
4
votes
1 answer

Quickly write byte to Bluetooth dongle's serial port when webpage loads

I have a USB Bluetooth dongle mounted (?) as /dev/rfcomm0, and when I navigate to my local IP address from another device on my network in a browser, I want it to write a 't' to the serial port so that it is transmitted over the Bluetooth connection…
Tanner
  • 41
1
2 3
…
12 13