RS-232 (also known as EIA RS-232C or V.24) is a standard for serial binary data exchange between a DTE (data terminal equipment) and DCE (Data Communication equipment). It is commonly used in the serial ports of PCs.
Questions tagged [rs232]
110 questions
14
votes
2 answers
USB-to-Serial showing gibberish at 115200 Baud
When using a USB-to-Serial interface everything works as long as I don't go beyond 57600 Baud. At higher rates I only get giberish like this:
év.b0JNLYÆÿ¿iëd0U²(kßÞb!
…
Mose
- 583
14
votes
4 answers
I found an old CRT monitor with a RS-232 (not VGA) video input. How can I use it on a modern computer?
I found an old Samsung CRT color monitor. I was hoping to use it for playing retro DOS games, but the main issue that I'm facing is that it's using RS-232, which as far as I can tell, is a very unusual choice for a monitor. I'm fairly confident it…
link jones
- 149
9
votes
2 answers
Is DB-25 port Serial or Parallel?
I would like to know whether the DB-25 port is a serial or parallel port. These ports are otherwise known as printer ports, aka LPT port.
I'm very confused about this since, according to Wikipedia, this port is considered part of the D-Subminiature…
Sam
- 103
- 1
- 1
- 3
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
8
votes
3 answers
How can I log in to Ubuntu using a USB serial port?
How can I enable remote terminal log in into Ubuntu 9.10 (Karmic Koala) using a USB serial port?
I created device /dev/ttyUSB0, and I want to allow logins using HyperTerminal.
I found some resources, but they are related to real hardware RS-232…
marc
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…
6
votes
7 answers
connect two computers together via a rs232 serial port
Wondering if anyone knows of a solution to connect with telnet/ssh through a rs232 serial port
Edit:
I am looking for a way to connect to computers together via a serial port. I want to be able to view the file system of a computer through a serial…
Richard
- 971
5
votes
3 answers
What is the minimum delay between two consecutive RS232 frames?
I have been working on creating a UART on an FPGA. I can successfully transmit and receive single characters typed on PuTTY. However, when I set my FPGA to constantly write a large sequences of "A", sometimes I end up with a sequences of "@" or some…
Lord Loh.
- 1,034
5
votes
3 answers
What exactly is transmission time?
The transmission time can be defined, as per Wikipedia, as (for a digital signal):
"The time from the first bit until the last bit of a message has left the transmitting node."
Thinking about digital signals, the tranmission time corresponds to…
5
votes
3 answers
Backup USB connection for Test Cell - USB splitter design?
This is a question for a project I am working on involving an unusual use of some USB equipment. Please see the diagram.
Our existing setup consists solely of a single link between the device and the laptop - this is the USB-over-Cat5 link shown as…
Guest1
- 51
4
votes
6 answers
Serial to Stereo cable?
While going through some (really) old computer parts I came across a very interesting cable: a female RS232 (9-pin serial) to 3.5mm stereo jack.
Any ideas what this cable might have been used for? (it's not a makeshift DIY cable)
I remember having…
Molly7244
4
votes
0 answers
Using a modern Linux computer as a VT52 Terminal for a CAEN Sy127
I have an old CAEN Sy127 high voltage supply which I would like to control from a modern linux machine. The Manual (p. 20; also there is a more thorough documentation of the communications module in section 2.3 starting on p.9) says that the HV…
gearmic
- 41
4
votes
2 answers
How does a RS-232 to USB converter work?
When I send some data using RS-232 cable a sender and receiver have UART. I can use RS-232 to USB converter to connect some device or other PC to my laptop. Does such converter has inbuilt UART? How data is converted from RS-232 to USB?
Irbis
- 151
3
votes
3 answers
Connect 2 computers with RS232 to USB cable
So I have a very, very old DOS machine with an RS232 port on it and I want to be able to transfer files to it from a Windows 7 machine. For this i bought an RS232 to USB cable.
What sort of software do I need for the devices to see each other, once…
Capurnicus
- 31
3
votes
1 answer
Can't communicate using PuTTY, but can with Termite
I'm trying to establish a serial connection to a peripheral from my PC's RS-232 port. Pretty simple stuff, and I've had not trouble doing it with countless peripherals before. And yet when I configure PuTTY to the right baud rate, stop bits, etc.…
SharpHawk
- 93