Questions tagged [rs232]

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.

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18 views

Connect usb barcode reader to communicate with COM client app

I would like to ask you for an advice. I am a junior network admin at an undisclosed corporation and we have and old integration system which handles barcode reader input via Serial connection over ...
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91 views

USB to Serial RS232 - device setup correctly but software cannot open port?

USB to serial set up correctly with drivers and device manager states "The device is working properly" and assigned to COM2, but no software seems to be able to detect or use COM2. cmd mode ...
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227 views

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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391 views

Driver bug in CH340 USB to RS232 converter chip

I have a USB to RS232 converter adapter with the chinese chip CH340 from WinChipHead (wch.cn) The CH340 chip is not only used in adapter cables. It can also be found in counterfeit Arduino's from ...
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Running Windows XP rs232 software on Windows 10 PC

I have a piece of software that communicates with CNC machines using a usb to rs232 converter. The software communicates perfectly on Windows XP. I had to install the same software in compatibility ...
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1answer
811 views

RS232 to VGA adapter [duplicate]

I have some devices with an RS232-connection (e.g. a beamer, a TTL-to-RS232-adapter for my NanoPI R1 described here, etc). No i have found a RS232 to VGA adapter: Now i wonder, if I would have this ...
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137 views

Configure Serial port for ethernet

I have an unmarked cable that adapts an rs232 serial port to an Ethernet jack. How do I configure my ubuntu 18.04 machine to work with it?
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35 views

Weighing Scales connected by RS232 to USB keeps disconnecting

i have some weighing scales with a serial port (RS232) and are connected to Windows 10 PC with a Serial to USB Cable. The scales are detected (COM3) and drivers are installed correctly, and im able ...
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1answer
1k views

pyserial RS232 to Ethernet converter? will work?

If I use an RS232 to Ethernet converter like this and connect it to the lan network by transmitting data from a printer or any other serial device, is it possible that I can read the serial ...
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108 views

Can a single cat5e cable be used to transmit RS232 and 100BaseT?

Ive got a single cat5e cable running from point a to point b. I need to run RS232 and 100BaseT over it. I know i can get 100BaseT over the cable by using only 2 pairs. But can i use the remaining 2 ...
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1answer
57 views

Putty received data only shows after pressing Enter

I am working on an application which pulls data from an RS232-enabled device. I am able to connect to the device using Putty and send queries, however the response is not shown immediately in Putty. I ...
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2k views

Converting USB keyboard to RS232

In my workplace we use an old software that accepts keyboard input, but only from a keyboard that's connected to a COM port. We have an old converter that has a PS2 keyboard input and converts it to ...
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1answer
503 views

How to convert from an EasyLyte RJ-12 connector to and RS-232 serial connector

I have a device with an RJ-12 connector, I need connect to a computer by RS-232. This is document of device: Computer Connection: The EasyLyte systems can be interfaced with an external computer by ...
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1answer
41 views

Cabling between inverter and single board computer

I'd like to interface an inverter with Gateworks GW5220. The inverter has an RS232 port shown below and GW5220 has a 5-pin RS232 Serial interface. The GW5220 serial connector is labeled as follows: ...
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2k views

How Can I Communicate RS485 Device With PC

I'm trying to communicate with a RS485 device with my PC. I connected RS485 device to RS485-RS232 converter. RS485-RS232 converter is connected to the USB-RS232 converter and USB-RS232 converter is ...
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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 ...
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2answers
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Putty serial port access to RS-232 console showing double character display with USB/Serial cable

I am trying to access a Matrix Sense firewall administration console through its RS-232 interface and the display I get with Putty is weird. The hardware is a PC Engines APU4B4 motherboard. I am ...
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1answer
539 views

Adding RS232(Serial Port) to motherboard

I need to add a RS232(Serial Port) connection to my pc, and unfortunately I'm unable to use RS232 to USB adapter, only direct RS232 connection, I have seen this item: https://www.aliexpress.com/item/...
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159 views

Safely Transition from RS232 “Dumb Terminal” to RJ45 Telnet/SSH

An HPUX 11i network, running on new hardware, for what they call “mission critical” operations at a unique business, terminates for the user at Sherwood 7000STs. While functional (and lightning fast ...
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1answer
2k views

Forward shell to serial on Linux

I'm trying to forward a shell to serial (USB to RS232) so I can use an old monochrome CRT terminal. How can I forward a shell to a serial port so the other end can send commands & read output ...
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99 views

Can non IP data formats over cat5 / 6 (eg. RS232 etc..) damage an IP switch?

Can various data formats can be run over a cat5 / 6 cable with RJ45 ends. These can include (not an exhaustive list) HDbaseT RS232 / RS485 (using an RJ45 to serial adaptor on the end) POE Cat6 (...
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3answers
133 views

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 ...
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2answers
162 views

linux high speed character detection rs232

I have to do a code in C to detect the inter-characters time within a rs232 line on linux. Inter-characters time to detect could be 1ms. So I need something to timestamp very quickly an incomming ...
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484 views

Interfacing With IEC 62056 - 21 port via RS232

I need to read energy meters (electricity prepaid meters or smart meters) information via the optical port in DLMS or IEC 62056-21 using RS232 interface. I already have the optical port and a ready ...
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1answer
643 views

Serial connection recieving continuous junk

I am trying to connect over a serial port to an HP AM867A switch (more broadly it is a Brocade 8gb SAN switch). I got the switch used so I am trying to perform password resets. The switch is running ...
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1answer
332 views

RS232-to-Ethernet adapter configuration not working [closed]

I have a iPocket232 serial RS-232 to Ethernet adapter and whenever I try to configure the settings in a terminal window on Windows 10, it doesn't let me select an option. When I type in an option ...
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2answers
3k views

Does this RS232 Serial Cable require an external Power Supply?

I have a device that supports USB and RS-232 protocols but the device comes with only USB cable. The device works just fine with USB cable, however, I need to use the RS-232. I've purchased RS232 ...
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37 views

Relationship of system serial drivers to RS-232

I am trying to strengthen my understanding of serial ports and device drivers. I was told that the serial port standard, RS-232, defines the electrical characteristics and timing of serial port ...
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2answers
9k views

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 ...
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502 views

windows 7 - serial port communication, setting stop bits

I have a program which reads/writes to a serial port (com). I suspect that the program sets 2 stops bits for the communication (it has some problems with reading messages). I can't change a ...
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1answer
867 views

Latencies in Ethernet to RS232 adapter

Requirement: I have a software running on my Windows which communicates to an external device using RS232 port. The hardware receives the commands sent from PC and responds back to PC. When using a ...
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1answer
414 views

Finding the address of a control register for a serial port in Ubuntu (or UBOOT)

I'm relatively new to Ubuntu and serial ports. I'm trying to find the address of the control register, that controls serial port 1 in Ubuntu. The Serial Port is using the RS232 method to communicate ...
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1answer
359 views

Lantronix ETS16P: Escape Sequence

I have an Lantronix ETS16P serial terminal server which I have configured to login via telnet and have access to the serial port of my servers, routers, switches. I have done this by configuring a ...
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116 views

Can a RS-232 COM port damage the motherboard's SATA controller?

We have a chromatograph connected to a computer through one of those old COM ports (RS-232 serial port). That COM port is onboard, connected directly to the motherboard's logic. The motherboard has 4 ...
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1answer
126 views

USB to Serial Connection - Danger to Motherboard from Electric Shock?

Last night I setup a machine that talks to our security system over Serial Connection. The serial cable goes through the roof of our building. The machine I setup this one, also hosts important VM's. ...
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945 views

Control Amplifier from Computer via RS232

I got a second hand Rotel RSX-1056 amplifier that I would like to control from my computer (because I don't have the remote). The amplifier has a serial port (RS232) and on the web I was able to find ...
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2answers
865 views

how to connect 2 computers using console cable

I know this is a weird question, however, I have a console (rollover) cable - the one used to connect to network devices' console port (e.g. cisco switches). I'd like to know if it's possible to use ...
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1answer
903 views

Read serial input from RS232 to USB converter

I want to connect a barcode scanner to my PC and read its output from a selfmade program. I know that there are basically two methods of obtaining output from a barcode scanner: As Keyboard Wedge - ...
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1answer
895 views

Forward internet connection over RS-232 Port

I have a Campbell Scientific CR1000 board and have a wireless modem that I plug into the board's RS-232 Port. In order to save data, I would like to forward/bridge my internet connection from my ...
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3k views

Sending commands via serial connection

I've got a Sartorius GD-503 electronic lab scale that I'm trying to work into a control setup. I've got both the regular manual and the data interface description manual. So far I've got my laptop ...
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1answer
556 views

How do I find the Vendor ID of this RS-232 to USB-A 2.0 adapter? [closed]

I need to programmatically allow permissions for this USB device via its vendor ID, but I don't know what its vendor ID is: Does anyone know what the ID is, or how I can discover it?
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1answer
11k views

Receiving data from Serial Port

I want to receive data from RS232 Serial port to my terminal and with a directive to a file. It should be pretty straight forward. cat /dev/ttyS0 cat /dev/ttyS0 > file.txt Before that I've ...
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3answers
852 views

Can USB to RS232 converter completely “mimic” classic RS232 port on motherboard?

I bought notebook few days ago and of course it doesn't have serial port :) I'm interested in satellite technology and most satellite receivers use serial port for communication with computer. That's ...
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2answers
3k views

How to communicate with two PC using RS232

I was just wondering that is this possible to communicate with two computers using RS232 using softwares like docklight and putty. Suppose if i send Hi from on pc will it recive in another PC and ...
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617 views

Linux server to send and receive from RS-232 using socat

I'm trying to bench test a configuration where a Linux server will send and receive RS-232 data from a Black Box RS-232 to Ethernet converter. I've followed this example. I've configured ser2net.conf ...
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1answer
779 views

Netgear Prosafe GSM7248 Console problems

Hey all this is my first time dealing with a managed switch and i seem to be having issues with trying to log into the RS232 console on it. First thing i did was reset it back to factory defaults (i ...
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1answer
579 views

How to transfer data between RS-422 and RS-485 ports?

I'm relatively new to behaviors of serial ports such as RS-232, RS-422, and RS-485. I'm wondering how do you initiate data transmission between a system and a device connected to each other by one ...
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1answer
1k views

RS232 serial Y splitter to Raspberry Pi (USB) and thermal printer sometimes blocks flow to printer

We are sniffing data from a restaurant point of sale system (RJ45 to DB9) to its thermal printer by using an RS232 splitter and a Raspberry Pi (DB9 to USB on the Pi). This has worked great 99% of the ...
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1answer
319 views

Setting RS-232 RTS pin

I am experimenting with my PC's RS-232 interface on Win7. I want to toggle the RTS line state with "mode com1: rts=on" command. However monitoring the RTS line with multimeter shows that the state of ...