Minicom device

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. It only takes a minute to sign up. Thus they have only "crossed over" data lines. But if you are not using it with an actual modem, you might want to go to the "Modem and dialing" settings and disable the "Modem has DCD line" option. Once you've got the Default updated with all the proper settings, try restarting minicom with no flags.

This works for me most of the time. If your communication doesn't work, check the baud rate and parity are correct. Sign up to join this community. The best answers are voted up and rise to the top. Asked 6 years ago. Active 1 year, 4 months ago.

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Viewed 43k times. I am trying to use minicom in Ubuntu. I got this output: [ 0. Following steps are executed in order: Open the minicom by using command sudo minicom -o -s -w. Press Enter to exit to main menu then Esc to start minicom. After these steps it should work fine, but my minicom is showing "offline".

Where is the mistake in my configuration? Thank you! No mistake. Both can be overridden. These signals were used with modems to indicate a solid connection and readiness to talk, respectively.

Probably before your time. Active Oldest Votes. Serial ports include control lines in addition to the data lines. If the data is coming though OK, you can ignore this, probably.Features include dialing directory with auto-redial, support for UUCP-style lock files on serial devices, a separate script language interpreter, capture to file, multiple users with individual configurations, and more.

When it is used, minicom does not initialize, but puts you directly into the configuration menu. This is very handy if minicom refuses to start up because your system has changed, or for the first time you run minicom. For most systems, reasonable defaults are already compiled in. Minicom will skip the initialization code. This option is handy if you quit from minicom without resetting, and then want to restart a session.

It is potentially dangerous though: no check for lock files etc. For now it is assumed, that users who are given access to a modem are responsible enough for their actions. This is the default in 1. Minicom assumes that your Meta key sends the ESC prefix, not the other variant that sets the highest bit of the character. This only works on terminals that support it and that have the relevant information in their termcap or terminfo database entry.

Some terminals, notably Televideo's, have rotten attribute handling serial instead of parallel. By default, minicom uses '-a on', but if you are using such a terminal you can must! The trailing 'on' or 'off' is needed. With this flag, you can override the environment TERM variable.

This is handy for use in the MINICOM environment variable; one can create a special termcap entry for use with minicom on the console, that initializes the screen to raw mode so that in conjunction with the -l flag, the IBM line characters are displayed untranslated. Because there is apparently no termcap support for color, these escape sequences are hard-coded into minicom. Therefore this option is off by default. You can turn it on with '-c on'.

Run the named script at startup. So far, passing username and password to a startup script is not supported. You can specify an index number, but also a substring of the name of the entry. If you specify a name that has multiple entries in the directory, they are all tagged for dialing.

You can also specify multiple names or index numbers by separating them with commas. The dialing will start from the first entry specified after all other program initialization procedures are completed. This overrides the terminal port defined in the configuration files, but only if it is a pseudo TTY.

Open capture file at startup. Example might be 'latin1'. This mode is to display 8bit multi-byte characters such as Japanese.Review your favorite Linux distribution. Welcome to LinuxQuestions.

Mac's and serial TTY's

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They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own. Click Here to receive this Complete Guide absolutely free. Hi, Has anyone had an issue where minicom is set to communicate with a usb device, command is sent.

In order to see the response we need to close minicom and reopen it. The response is there. We are using XUbuntu The usb device is custom hardware purchased that uses ascii commands. Thanks Paul. Originally Posted by prl We have confirmed the port settings. Using wireshark to sniff the packets it looks like the response from the device is in two packets.

And the first packet does not include an end of line character. I agree with TBOne that you have not provided enough information. Just because there isn't an EOL character should not prevent minicom from displaying incoming data although we do not know how its configured. As stated hopefully the manual that came with the device has some information on its protocol.

If it is online can you provide the URL?

Working with the serial console

I have used minicom with many many serial devices, real and virtual i. Its just understanding how the protocol works. Last edited by michaelk; at PM.An Arch Linux machine can be configured for connections via the serial console port, which enables administration of a machine even if it has no keyboard, mouse, monitor, or network attached to it.

A basic environment for this scenario is two machines connected using a serial cable 9-pin connector cable. The configuration instructions below will enable boot loader menu selection, boot messages, and terminal forwarding to the serial console. When using GRUB with a generated grub. Edit refind.

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To enable serial console in Syslinuxedit syslinux. The serial parameters are hardcoded to 8 bits, no parity and 1 stop bit. At boot, systemd-getty-generator 8 will start a getty instance for each console specified in the kernel command line. Enable the service to start it at boot. See its homepage [2] for more examples. Start Minicom in setup mode:. Press Enter to exit the menus pressing Esc will not save changes.

Remove the modem Init and Reset strings, as we are not connecting to a modem. To do this, under the Modem and Dialing menu, delete the Init and Reset strings. Optionally save the configuration by choosing save setup as dfl from the main menu.

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Restart minicom with the serial cable connected to the target machine. The following example connect to ttyS0 at bps:. GNU Screen is able to connect to a serial port. It will connect at baud by default:. Serialclient [3] is a CLI client for serial connection written in ruby. Install ruby package, then install it with the following:.

This can cause weird problems with some full-screen programs e. However, this requires you to manually input the proper geometry.

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The following methods should be simpler. There is a lesser-known utility called resizeshipped with xtermthat can solve this problem. Invoke it without parameters after you resize the terminal emulator's window:. If you don't want to install xterm, it is possible to do the same work via a shell function.

Put the following function into your zshrc and invoke it without parameters after resizing the terminal emulator's window:.I recently wrote about my first experience connecting to the pinephone via serial console. This post documents how to configure Minicom for establishing an interactive terminal session with a device connected to your computer via a serial port.

The configuration will be saved to file so that it can be reused to connect to the same device again in the future, which is convenient. My version of minicom at the time of writing is minicom version 2. If you are unfamiliar with my key binding notation please refer to my appendix on Key-binding notation.

Connect your device to your computer via the serial cable. The first line tells us the bus number, port and device number. Looking further down the list we can see that the manufacturer is FTDI. There are more serial port names than I mention here.

Also, the index number at the end of the name is determined by the devices minor number and may not be 0. The device name for a serial connection is properly referred to as a serial port.

minicom device

The rest of this blog post will simply use ttyUSB0 as the name of the serial port, but you must use the correctly named serial port assigned to your connected device if you are following along. Our user account requires rw permissions to initiate a connection with the device.

This is achieved by adding the correct group membership to our user account. We can look up the required group membership using the ls command. The output from ls shows us that the uucp group has rw permissions to the device. Another common group that is used for the group ownership of serial devices is the dialout group.

If your system uses the dialout group rather than uucpthen in your mind simply substitute dialout in place of uucp for the rest of this post. It makes semantic sense for the dialout group to be used if the device is a modem or a fax.

We can use the groups command to find out if our user is already a member of uucp. Since my user is not a member of the uucp group, I will add the group membership using gpasswd. Now that we have the right group membership, we can establish a serial connection. By default, minicom reads and writes configuration files to a path that is set at compile time. To find out where that is on your system, simply run the following command. Start minicom by passing it an appropriate custom configuration name.

Since the named configuration does not yet exist, minicom will simply load its default settings.Please note that while PuTTY will work, it is missing a number of features relative to a real Linux terminal. In particular, a number of keystroke shortcuts will not work with PuTTY, and not all output will be displayed correctly in PuTTY although it does manage to display most output correctly. For serious work with Linux, a real Linux terminal such as minicom, described here is strongly recommended.

The use of a terminal emulator, such as minicomis required when connecting to an EMAC board via a serial console. This page sets out to provide general information about using minicom to communicate between EMAC machines and a development PC.

minicom device

Note that most configurations are named minirc. If minicom has yet to be installed on your Linux machine, use apt-get to install the minicom package.

Minicom error solution “Device /dev/ttyS0 is locked”

The minicom settings will need to be changed so that the application will be able to find your device. Pull up the settings using the -s option. This should bring up a colorful display listing the different settings. If the display isn't colored, arrow down to Exit from Minicom. Run the minicom command with the option -con.

The c specifies the color display and on tells minicom to display the interface in color. Another method to set minicom to always display in color is to set an alias for minicom to minicom -con.

minicom device

However, doing this could lead to problems or confusion when trying to run minicom with other aliases or with a very specific set of commandline options, so the environment variable method should be used instead wherever possible. The first thing that will need to be configured is the Serial port setup.

Arrow down to the title and press the 'Enter' key. To modify the different configurations, press the key corresponding to the setting. For example, press the 'A' key to modify the path to the Serial Device. Press the 'Enter' key to save the parameters for the setting. Press enter and scroll to Modem and dialing and press enter again.

Clear out the Init stringReset stringDialing prefix 1Dialing suffix 1Dialing prefix 2Dialing suffix 2Dialing prefix 3Dialing suffix 3 by pressing the corresponding letters [A-H] then deleting the string. The final result should look like:. You will most likely wish to modify the Serial Device setting to have the path to the serial port you normally use. This way, you'll be able to run the command without any options or commands. Press the 'Esc' key to be be brought back to the configurations page.

The next setting that needs to be configured is the Modem and dialing. Press the 'A' key and delete its content. Hit the 'Enter' key to set the setting as blank.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

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I was playing around with a router earlier this evening using minicom and I must not have closed it cleanly. Here is the error message that I get when I try to open minicom:. I have two questions, 1 how would I go about getting out of this state, and 2 how do I exit minicom cleanly so that I can avoid this happening again. I ran into a similar issue with using gtkterm from a remote terminal. I had shutdown the terminal without explicitly terminating gtkterm.

The result was that subsequent gtkterm sessions gave me the error:. Checking the process list via ps did not show any gtkterm processes still running. After doing that, gtkterm was able to open ttyUSB0 successfully. The canonical way is to use lockdev. This is apparently obsolete these days, but minicom at least as of version 2. Learn more. Asked 7 years, 11 months ago. Active 11 months ago. Viewed 37k times. William Jia. William Jia William Jia 2 2 gold badges 7 7 silver badges 11 11 bronze badges.

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