Configure Minicom For Serial [CRACKED]
Donnie Ehlen
minicom is a serial communication program that connects to devices through a GNU/Linux PC's serial ports. If run by calling its name without any additional arguments, it uses whatever settings have been saved for its defaults in /etc/minicom/minirc.dfl. For those using Windows, PuTTY is a viable application to make such connections between a Windows PC and one of our EMAC devices. More information about PuTTY can be found at
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 minicom, is 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.
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. minicom can be made to always run in color by modifying the /.bashrc file, setting the MINICOM environment variable by adding the lines shown below, and restarting your terminal session (or sourcing your .bashrc) to make the change take effect:
Another method to set minicom to always display in color is to set an alias for minicom to minicom -con. 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 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. Also do this for B through H and K. Hit the 'Esc' key when finished deleting the content of these settings.
Log in, if necessary, with the appropriate username and password for the device. Login information can be found here.You're now able to communicate to the device and use minicom in the same way as using the terminal for the device.
This program is a very important tool for developers. The serial console is essential for working with the bootloader on ARM systems, since U-Boot cannot be accessed via ssh. Using the serial console, you will be able to configure the bootloader, to program new kernels via the bootloader, to program new filesystems, to make a copy of the filesystem on a board, and to perform memory checks using U-Boot. The serial console will also enable you to see startup and shutdown messages, to configure and debug the system when networking is not configured or is not working, and to debug the system when the machine is not booting up.
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 2.7 (compiled Jan 8 2018).
You will see a lot of output being written to the screen as your device loads. In the end, you should see a login prompt. Since minicom is a terminal emulator, you can click on the screen and enter your login credentials as if you were connected to the device with a keyboard and monitor.
That is because /dev/ttyUSB0 is being initialized in cooked mode and therefore some translation is being done by the line discipline before it is received by the TTY and ultimately minicom. In order to run ncurses applications correctly we need the TTY to be initialized in raw mode. That can be achieved using the stty raw -F /dev/ttyUSB0. However, when raw mode is configured in this way, minicom still appears to perform its own bytestream translation. I also tried setting the -l optional flag to enable literal translation, which translates IBM line characters to ASCII. Perhaps there is something that I have missied here. Please feel free to comment if you have suggestions.
Those who work with infrastructure/server deployment knows how difficult it is to get a console for those devices having no display like switches, routers and a blade chassis/enclosure. Usually we use any console connection utilities like putty, minicom, RealTerm or cu. Here I am explaining how to configure minicom in linux for a console connection to Cisco Nexus 5K switch.
Looking for some assistance testing a UART implementation with hardware flow contorl for the OMAP L138. To test the implementation I use minicom to emulate the other end of the serial link and I'm looking for some insight into how it needs to be configured.
I have a simple application that sends messages over UART from the OMAP to minicom. This works as expected if both OMAP and minicom are configured to NOT use hardware flow control. When I turn hardware flow control on, I don't see any output on minicom.
However, the changes to minicom listed above don't seem to be sufficient to get flow control to work correctly. After starting the application, the RTS(request to send) signal from the OMAP goes low, indicating to minicom that it wants to send data. If configured properly minicom should pull the OMAP's CTS(clear to send) signal low and start accepting data until it reaches the specified receive buffer threshold. This does not happen. The CTS input to the OMAP is always high. Just for kicks, I tried shorting the RTS to CTS on the OMAP and voila, the expected messages do show up on minicom! Here's an image that shows how the two are hooked up.
I am trying to connect minicom to a serial device that is connected via a USB-to-serial adapter. This is a PL2303 and from everything I've read no additional drivers are required. The device is recognised as a PL2303.
I get the error when the device attached to the serial port end of my Prolific Technology PL2303 USB/Serial adapter is turned off. After turning on the device (an embedded controller running Linux) minicom connected fine.
The specific Cisco switch I configured was a Catalyst 3560 series PoE-48. I am sure these direction will work with other similar devices. Since I am an openSUSE user, the directions are tailored as such.
My first step was to find a piece of software that would work for me for this and I am sure that there are a ton of solutions but the one that worked the easiest for me was minicom. I am open to other suggestions, of course.
I have a micro-controller device that is sending newline-terminated strings through the USB-attached serial port and (so far) I'm using minicom version 2.6 to read from /dev/ttyACM0. I've setup the terminal application for line wrapping but I'd like it to go to the beginning of the next line when receiving a line feed character from my serial device. Can [and how does] minicom do that?
Currently I need to set it every time I open a minicom instance. I would have thought that this setting would be located inside the minicom configuration, but it seems to be more of a runtime setting.
Here's the main thing though: I have to open a terminal on my workstation, SSH across to the access server, then run minicom. I have to do this once for each device. Although that's not a back breaker, I'm sure there must be a simpler way to do it - can I tell my server to expose each serial connection as a telnet or ssh port? I would really like to be able to run a script of some sort that launched all eight sessions in one click.
sudo minicom /dev/ttyACM0 ?
sudo minicom /dev/ttyGS0 ?
in my case, they both two since recent seem to reffer to tty8 port and the oem-configuratino setup will not pop up [ worked previously thougs]
Hi @gtj
Thank you for following up!
However the issue in my case is not with the utf8. I saw the latter before two times and it is still usable with its utf8 issue. It is expressed in part of text interface being reflect in a corrupted way, but it is still possible to get through and finish the setup.
In my case with nx, the issue is that there is no output on /dev/tty8 interface that is being reffered too when I start listening on tty ports. Given the display is detached and the board has just been flashed with headless sdkmanager. In minicom the status is shown as offline.
No, there is no display connected to the nx device;
Eventually every connection to ACM0 or ttyUSB* port will open the tty8.
No, it was not an empty sdcard. Last two times I re flashed the nx devkit consecutively with sdkmanager to see if the oem setup will pop up in the terminal but it did not occur. Before these two reflashings there were more reflashings with sdkmanager.
Upd: using minicom /dev/tyGS0 will also pop up tty8
Moreover, I shall try to connect to the serial console next time. As I recollect the successful attempts of enetering oem-setup were in case I tried both serial console connection and usb-c connection with minicom. Thank you for sharing the idea!.
just to clarify,
execution of minicom /dev/tty* [ here various combinations were tried including ACM* ttyUSB* ttyGS0* and others] will open a minicom terminal that binds to the port tty8 as it listed at the host pc minicom interface.
I'm trying to get a serial connection working using minicom on a 2.6.32-ARCH kernel. Therefor, I have short-curcuited pins 2 and 3 (RX and TX) for testing purposes. Works perfectly on Windows, so no hardware issue.
I am a new user of open-SUSE 12.2 KDE and I am trying to console into a juniper netscreen firewall for configuration. I have a usb-to-db9 adapter and I would like to know if it is possible to achieve this due to my limited knowledge of the OS and Linux in general. I would appreciate if you can point me to some material that will help me configure it. I have tried Google but most articles describes the serial-to-serial connections and fairly old.
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