Linux echo serial port

Writing to the serial port from the Linux command line

The device starts the requested operation. When I try to accomplish the same operation from a stand-alone Debian box or from a Debian VirtualBox instance of the same Windows machine, I had no luck so far. Here are equivalent Linux commands (at least I think so):

stty -F /dev/ttyS0 speed 9600 cs8 -cstopb -parenb echo '\x12\x02' > /dev/ttyS0 

3 Answers 3

If you want to use hexadecimal codes, you should add the -e option to enable interpretation of backslash escapes by echo (but the result is the same as with echo Ctrl + R , Ctrl + B ). And as wallyk said, you probably want to add -n to prevent the output of a newline:

Also make sure that /dev/ttyS0 is the port you want.

thanks, I am sure that it is the port that I want, is there a simpler way of testing serial connection, echo always returns success.

will not be interpreted, and will literally write the string \x12\x02 (and append a newline) to the specified serial port. Instead use

which you can construct on the command line by typing Ctrl V Ctrl R and Ctrl V Ctrl B . Or it is easier to use an editor to type into a script file.

The stty command should work, unless another program is interfering. A common culprit is gpsd which looks for GPS devices being plugged in.

Thanks so much for your response, I tried the echo -n CTRL+VCTRL+RCTRRL+VCTRL+B from command line but I couldn’t make it work, I want to try other commands, therefore I want to know how you come up with these translations(0x12 = ^R , 0x02 = ^B), these are not ascii translations I suppose.

@erincarikan: use man ascii to see how 0x12 relates to Ctrl-R. They are pure ascii. It is possible that some ctrl combinations won’t work, like ctrl-@ (NUL). It could be easier to write a program to do a binary protocol like this.

thanks I totally got it, but unfortunately it doesn’t work, I am suspecting that something is interfering with stty , I don’t have gpsd running. I got to look into this more.

Using Screen:

Note: Screen is actually not able to send hexadecimal, as far as I know. To do that, use echo or printf .

I was using the suggestions in this post to write to a serial port, and then using the information from another post to read from the port, with mixed results. I found that using Screen is an «easier» solution, since it opens a terminal session directly with that port. (I put easier in quotes, because Screen has a really weird interface, IMO, and takes some further reading to figure it out.)

You can issue this command to open a screen session, and then anything you type will be sent to the port, plus the return values will be printed below it:

(Change the above to fit your needs for speed, parity, stop bits, etc.) I realize Screen isn’t the «Linux command line» as the post specifically asks for, but I think it’s in the same spirit. Plus, you don’t have to type echo and quotes every time.

echo

It follows praetorian droid’s answer. However, this didn’t work for me until I also used the cat command ( cat < /dev/ttyS0 ) while I was sending the echo command.

printf

I found that one can also use printf’s ‘%x’ command:

c="\x"$(printf '%x' 0x12) printf $c >> $SERIAL_COMM_PORT 

Источник

Echo command to serial port in Linux

Use then, the serial number will be emulator-X and your avd_X will always be on ports X,Y , so you can run your commands with this serial number, like for example To kill the emulator run Solution 2: There are 2 ways that I know of to perform a reverse Serial Number to AVD name lookup The Telnet option — The Ugly Way As pointed out in this SO answer. How can I recognize each emulator device or get the serial number of emulator after it runs?

Echo command to serial port in Linux

I want to echo something from my Ubuntu host to some device.

It works well if I use putty or minicom.

However, it doesn’t work if I do echo from the shell terminal:

From my device, I saw that the first letter of the cmd is received correctly while the second one received is ASCII bigger than 200. I also have tried to use the «stty» command to adjust the serial communication settings but didn’t help. Does anythone know why?

First You need to set the tty device settings and then you need to transmit the data whatever you want

stty -F /dev/ttyUSB0 9600 -parity cs8 -cstopb 

Chainsaw – How to Find the Model Number, This video provides helpful tips to identify where the model number is located on a chainsaw. Part testing, repair procedures and replacement parts are not d

Finding echo serial number and chain length size

About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright …

How to identify your amazon echo device by it’s name, if

If you have multiple Amazon Echo devices in your home and move them around etc it can sometimes be difficult to identify what’s what. However, if you ask the

My Amazon Echo Won’t Register!

My Amazon Echo won’t register!I’m pretty sure it is still in your Amazon order list, and that rang up as a hefty bill. I don’t know how to fix this or get co

How to Get Serial Number or ID of Android Emulator After it Runs?

If I run several emulators with -no-window option in one machine. The command «adb devices» shows:

List of devices attached emulator-5554 device emulator-5556 device emulator-5558 device . 

However, according to this output, I can’t tell the difference between each emulator device at all. I need to know which emulator runs on what AVD, then I can install APKs or send commands to the emulator.

How can I recognize each emulator device or get the serial number of emulator after it runs?

Always start the same AVD on the same ports, don’t let emulator decide. Use

then, the serial number will be emulator-X and your avd_X will always be on ports X,Y , so you can run your commands with this serial number, like for example

$ adb -s emulator-X shell cmd 

There are 2 ways that I know of to perform a reverse Serial Number to AVD name lookup

The Telnet option — The Ugly Way

As pointed out in this SO answer. you can reverse lookup the AVD name for each serial number using Telnet. This is kind of weak, because all you’re doing is finding an instance of the emulator launched given a particular AVD name. It doesn’t uniquely identify the emulator you are wanting to work on. It also suffers from the need to use telnet and parsing out the port number for each emulator.

First get the currently running serial numbers

then telnet to each device’s port number

which will return the AVD name of that emulator.

The UUID option — The Right Way

I originally saw this done in a project called DCMTK. Generate a UUID uuidgen and set a property on the emulator at launch! My example launches an emulator to perform some compile time checks for libraries that require running code on the target to determine type information.

emulator -avd nexus19-arm -no-window -no-boot-anim -noaudio -prop emu.uuid=7a6f8701-43c2-4e16-988a-8b4992c0bf8d >/dev/null &1 & 

Then when you want to find that specific instance of the emulator you just roll through all running emulators and look for that UUID.

adb -s emulator-5556 shell getprop emu.uuid 

for SERIAL_NUMBER in `adb devices| grep emulator| cut -f1`; do UUID=`adb -s $ shell getprop emu.uuid | tr -d '\r\n'` echo $ $ done 

Tracking the whole emulator lifecycle

1. Launch the emulator with a UUID property
2. Then kick off a loop that checks each device to be online and/or having the matching UUID
3. Once you get a match call adb -s $ wait-for-device so you know when you can talk to the emulator
4. If you need the system to be fully online check for the property sys.boot_completed
5. When you’re done just kill of the emulator with adb -s $ emu kill

The same string (e.g., emulator-5554 ) is show in the title bar of the emulator window.

How to get serial numbers dynamically?

I want to get serial number 1 to any number dynamically, when my values fetched and show in a table. I ve used but no result, I want the numbers according to my inserted values, if i m getting 3 rows i want 1 2 3 .

here 1st one is my result table

the numbers should dispalye according to my entry dynamically

Firstly, you does not rend the form each row per seat. Also I don’t know what does $_SESSION[‘total_seats’] contains. But you can try this.

You have to wrap the whole row in the loop. Try this:

remember to increase the number for each row.

How To Find Your Model Number, Josh at Russo Power shows you where you’ll commonly find model numbers on different types of machines.Russo Power Equipment sells a …

How to determine windows version from a VB script? [duplicate]

Possible Duplicate:
A vbscript to find windows version name and the service pack

' Copyright (c) 1997-1999 Microsoft Corporation '************************************************************************** * ' ' WMI Sample Script - Information about the OS (VBScript) ' ' This script demonstrates how to retrieve the info about the OS on the local machine from instances of ' Win32_OperatingSystem. ' '************************************************************************** * Set SystemSet = GetObject("winmgmts:").InstancesOf ("Win32_OperatingSystem") for each System in SystemSet WScript.Echo System.Caption WScript.Echo System.Manufacturer WScript.Echo System.BuildType WScript.Echo " Version: " + System.Version WScript.Echo " Locale: " + System.Locale WScript.Echo " Windows Directory: " + System.WindowsDirectory WScript.Echo " Total memory: " + System.TotalVisibleMemorySize + " bytes" WScript.Echo " Serial Number: " + System.SerialNumber Wscript.Echo "" next 

The first message box gives me «Microsoft Windows 7 Professional».

Set dtmConvertedDate = CreateObject("WbemScripting.SWbemDateTime") strComputer = "." Set objWMIService = GetObject("winmgmts:!\\" & strComputer & "\root\cimv2") Set oss = objWMIService.ExecQuery ("Select * from Win32_OperatingSystem") For Each os in oss Wscript.Echo "Boot Device: " & os.BootDevice Wscript.Echo "Build Number: " & os.BuildNumber Wscript.Echo "Build Type: " & os.BuildType Wscript.Echo "Caption: " & os.Caption Wscript.Echo "Code Set: " & os.CodeSet Wscript.Echo "Country Code: " & os.CountryCode Wscript.Echo "Debug: " & os.Debug Wscript.Echo "Encryption Level: " & os.EncryptionLevel dtmConvertedDate.Value = os.InstallDate dtmInstallDate = dtmConvertedDate.GetVarDate Wscript.Echo "Install Date: " & dtmInstallDate Wscript.Echo "Licensed Users: " & os.NumberOfLicensedUsers Wscript.Echo "Organization: " & os.Organization Wscript.Echo "OS Language: " & os.OSLanguage Wscript.Echo "OS Product Suite: " & os.OSProductSuite Wscript.Echo "OS Type: " & os.OSType Wscript.Echo "Primary: " & os.Primary Wscript.Echo "Registered User: " & os.RegisteredUser Wscript.Echo "Serial Number: " & os.SerialNumber Wscript.Echo "Version: " & os.Version Next 

Microsoft Windows XP Professional

Version: 5.1.2600

Creating self-signed certificates with open ssl on windows, Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question.Provide details and share your research! But avoid …. Asking for help, clarification, or responding to other answers.

Источник

Шпоры

Инсталляцию рассматриваем на: # uname -prs FreeBSD 7.2-RELEASE i386 Ищем нужный порт: # cd /usr/ports # make search name=awstats Port: awsta.

Что такое CUDA? Смотрите в википедии. Рассмотрим коротко простейшие примеры использования этой интересной технологии. Этот пост является кон.

Проведем краткий обзор установки проприетарного драйвера для видеокарты NVIDIA. Смотрим, какая видеокарта установлена в нашем компьютерне.

Если у нас есть программа, написанная с использованием gtk, то она может работать и на юникс-системах и на windows. Ее исходники не надо пер.

Хорошо, если у нас есть ноутбук с Debian wheezy. А что если у нас есть второй монитор и мы хотим его подсоединить к нашему ноутбуку? В моем.

Этот текст является конспектом глав «классы», «производные классы», «иерархии классов» книги Страуструпа &quo.

Весь интернет пестрит примерами использования OpenGL. Найти их не сложно. OpenGL сам по себе является кроссплатформенным. А поэтому, чтобы с.

Кваренион — это такая четырехкомпонентная сущность, с помощью которой можно задавать вращения в трехмерном пространстве. Их преимущество пер.

Если вам вдруг понадобилось вычислить дискретное преобразование Фурье, то для этой цели прекрасно подойдут два инструмента: http://www.fftw.

Вывод параметров порта в читаемом виде: #stty -a -F /dev/ttyUSB0 Переключение в raw режим: #stty -F /dev/ttyUSB0 raw -echo -echoe -echo.

Источник