Questions tagged [serial]

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

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Serial Port Issue

I am a new linux user, I have a workstation connected to a testing device through serial port (ttyS0) then suddenly it stopped working. I connected USB-Serial adapter to check the software also was ...
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Send ESC (ASCII 27) to sensor using putty

I am working on the Young anemometer 81000, datasheet: http://www.youngusa.com/Manuals/81000-90(I).pdf. Section 4.0 COMMAND MENU tells me I should send the ESC character (ASCII 27) 3 times in quick ...
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How to unload /reset serial port driver from High Sierra

I am trying to connect serial port devices to MacBook Pro using serial to USB connector running OSX 10.13 High Sierra. The hardware chip detail is User:~ mymac$ kexstat | grep -v apple -bash: kexstat:...
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Deterministic serial communication using UART

We are trying to receive sensitive data each 10 msec (100 bytes) via UART communication between Raspberry Pi 4 (runs ubuntu mate) and another embedded board that uses pic18. The UART is set as follows:...
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What does serial really mean? Isn't USB3/SATA actually parallel? [duplicate]

As far as I understand. Serial means data is being sent one by one instead of parallel where multiple bits of data are streamed simultanously. Howewer connections like SATA and USB 3 actually have ...
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Virtual com ports with Wine?

I am running some software under Wine (a SYM-1 simulator) that can accept connections on a serial port. I would like to be able to connect a serial communications program (e.g., screen or kermit or ...
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76 views

Minicom and screen in background

I would like to log serial port output in background. I use screen command for minicom to make sure minicom running on the background when I disconnect my ssh session. This actually works fine, but ...
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34 views

PPP0 Interface not coming up after dialing up using wvdial with a Quectel LTE Modem

I have a BG77 module that I communicate with through the serial0 port on a RaspberryPi. I have configured WVdial correctly, as can be seen here: root@raspberrypi4:/home/pi# wvdial --> WvDial: ...
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PUTTY -m ,but waiting for terminal to iddle

from an ubuntu VM I try to putty to a reaspberry by through uart pins and an FTDI dongle I want to automate the upload of a text file I use : sudo putty -serial /dev/ttyUSB0 -sercfg 115200,8,n,1,N -m ...
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1answer
423 views

Send ctrl-alt-del over minicom

Is there a way to send key combos (namely a sysrq) over minicom? I'm looking to issue ctrl-alt-del to a box of mine so I can shut it down gracefully. Does this exist?
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Initializing Serial Getty in Ubuntu Core 18

I've built a custom Core 18 image and loaded it onto my device. It appears to initialize just fine, but when I reach the initial configuration screen, it stops taking serial input and just spews ...
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snapd and appimage resetting serial port

I have a 3D printer connected to a USB virtual serial port (/dev/ttyACM0). I have found that when I start the Ultimaker Cura Appimage [1] and also when I did a "snap install", on Ubuntu 19.10, my ...
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664 views

Arduino Nano Serial Port error on Mac OSX Catalina 1.15.4

I have just recently bought my first Arduino board. Unfortunately when I went to upload my first sketch i got an error message saying that no serial port could be detected. Under Tools>Ports I can ...
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933 views

/dev/ttyACM0 lost after sleep - How to redetect / restart / rescan for ttyACM0?

I have a Ubuntu 16.04 based VM which runs inside VirtualBox on Windows 10. On my Host, I've connected a ZWave USB antenna, which I've then mapped/attached to the VM. When I first boot my VM, I can ...
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52 views

How do I change my Interfaces to up instead of down status?

What command do I use to change a S0/0/0 interface with PPP Encapsulation from a line protocol of down to up? I have already applied a no shutdown command.
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146 views

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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1answer
131 views

Are the communication protocols too different between USB and Ethernet?

I have a PA system that has 60 devices of which 57 are indoor wireless modules. They need a USB-a to b cable to program, and according to the manufacturer there is no way to program it over wireless. ...
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1answer
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How to format Excel cells to show only a certain part of the code my scanner scans from certain objects?

For ex: When I scan an qr code it shows: Column A1 vbmsavchjas asdhgaskhdgaskhdg_INX7642854858625 but I am only interest in the last characters: Column B1 INX7642854858625 I can use afterwards in ...
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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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24 views

Serial console echoes back input

Modified /etc/default/grub as below and successfully setup serial console on Ubuntu 18.04 (Bionic) GRUB_CMDLINE_LINUX="console=tty1 console=ttyS0,115200" GRUB_TERMINAL="console serial&...
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1answer
351 views

How to determine motherboard serial number

I determined that my motherboard is broken. Since I cannot turn on my laptop, how can I see which model of motherboard I have and what its serial number is? I need to buy new one. My laptop is a Dell ...
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1answer
285 views

no login when making a direct connection (USB-serial-USB) between Linux hosts

My goal is to use an FTDI null modem cable (FTDI-nmc) with integrated USB-serial converter on both ends as a simple and convenient method to occasionally log-in to various headless devices such as ...
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542 views

Use USB Barcode Scanner as Serial Device

I have an USB barcode scanner that is recognized as Keyboard. I have to read the scanned barcodes in background using Java but it seems to be no way to read directly from an USB port (and I do not ...
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380 views

ESP8266 Serial USB adapter doesn't work on Ubuntu

So I need to program a little ESP8266 microcontroller with the Arduino IDE. But the board which is connected with a Serial-to-USB Adapter won't get detected by my Ubuntu system. The adapter: https://...
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76 views

Unable to connect a TTL to USB converter to a phone

I have been unable to connect the USB side of a TTL-to-USB converter to a phone by using a Female-Female USB A adapter and a normal mobile phone cable (which can handle data). This is the converter ...
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988 views

How to represent a Carriage return (\r, ^M) as part of text over serial

I am trying to send a message including carriage returns (represented without pressing enter) over a serial connection. It works if i press enter with an open serial connection, but I have not found ...
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46 views

How to send Serial data to a UDP switch?

I have a data string I am receiving via a serial port to my computer. I would like to be able to send this data back out over UDP or TCP to a switch to be received by a remote sensor. Networking is ...
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277 views

Link serial /dev/ttyUSB0 to /dev/ttyS0

I have a program that communicates with an Arduino through the serial port but somehow the Arduino is showing up in the computer as /dev/ttyUSB0 and not /dev/ttyS0, which is what the program is ...
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37 views

Serial console buffer

when i connect to my board through serial console, launch my app which log some events with printf() and close serial console, my app can receive request and send response during a small time and then ...
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132 views

Arduino Uno not showing up in tty devices?

new laptop and I have never had this issue before. My arduino Uno doesn't show up in the tty devices. lsusb: Bus 002 Device 002: ID 8087:8000 Intel Corp. Bus 002 Device 001: ID 1d6b:0002 Linux ...
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389 views

How can I access a SPI NAND Flash Memory in embedded Linux?

I am a newbie with embedded Linux. I am using a Leon-Linux system on my evaluation board(Grmon GR712). I can compile the Linux kernel and build an image file via build-root. I want to access an SPI ...
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2answers
591 views

USB Hub dropping data from USB-to-Serial Adapters

I am currently designing a system, which needs to receive data from serial devices (mainly ARM boards). To achieve this, I use some USB-to-Serial (FTDI232) adapter(s). I coded a simple loopback ...
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139 views

Issues setting up a bridge connection for serial devices

I'm having trouble setting up a network of serial devices on a shop floor. I do have some basic networking experience but am not verbose in some of the more advanced settings. I'm trying to setup a ...
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83 views

MS Excel365 Date/Serial Date - anyone else experiencing?

I am having a problem suddenly with all computers at my place of employment. If I type a number into a cell (A1), such as "121218" excel is not auto-converting to a date. In addition, when the cell ...
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394 views

Node.js serialport readline parser - response devided to each sign in new line

I would need some help in resolving a node.js problem with serialport response on one computer with Ubuntu 18.04 64-bit. On the beginning I can confirm that the hardware which I have connected answers ...
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1answer
358 views

Arduino with HM-10 doesn't always receive the complete message that was sent [closed]

I am a beginner trying to communicate between an iPhone and an Arduino Uno. I have an HM-10 BLE module device wired to my Arduino. I use it to send and receive messages from my iPhone. My Arduino runs ...
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488 views

PCI-e Serial Adapter RS-232/422/485 drivers

Excellent 2019 to each of you ! I bought the PEX4S232485 from StarTech couple of months ago to only have it mounted into a Debian Server (Stretch) today. I confess I jump on that board without ...
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297 views

How can I use old MIDI devices with modern PCs?

I have a Yamaha PSR-550 keyboard. It was released in 2001 (it's as old as me!), and is equipped with MIDI ports: How can I use the serial MIDI port (marked to host) with my modern PCs? (They don't ...
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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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1answer
2k views

Redirect serial console for ssh/minicom

I am working with an embedded Linux system using a USB serial port as the system console. When I am local to it, I simply use a USB cable to my PC and run PuTTY, giving me an interactive console ...
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Executing multiple commands over serial port with PuTTY with a .bat file with a delay between individual commands

send.bat: plink -load test < commands.txt (test is a saved session in putty) commands.txt echo set_zero timeout /t 3 /nobreak >nul 2>&1 pause >nul 2>&1 echo set_a 65535 ...
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How do i find out which Windows do i need?

I had to reinstall my laptop, and "luckily" my recovery disk is broken... My laptop is too old to get help from the manufacturer or the seller, BUT i have the Windows serial key at the bottom of the ...
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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: ...
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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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Splitting serial port output

I have a nurse call system that has output that connects to a paging transmitter. Works good right now. We put in a serial "Y" splitter so that we could receive the same data, but to another computer ...
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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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1answer
73 views

How does a machine interpret serial data from an external serial bus?

Most external buses (e.g. USB) transfer data in a serial manner. However, a machine like a PC needs to turn this into parallel data to interpret it? How does it do so? Edit: If most computers operate ...
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4k views

Network between 2 routers - is it LAN or MAN or WAN?

We have two interfaces on two routers, which are connected with a serial cable. Both of the interfaces are in network 224.0.0.0/24. So one interface on the first router has IP address 224.0.0.1/24. ...
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8k views

Running batch commands through PuTTY serial connection

I have a sequence of commands which I use to update the firmware on my Linux machine. When I connect to the machine using a serial connection I can type the commands one-by-one and they work fine. I ...
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146 views

Connect Windows PC to remote Linux serial port

I have a remote Linux(Ubuntu) server with embedded device connected to the server's serial port. I have a Windows program to manage that embedded device. Is any way to share server's serial port via ...