Comments on: Linux / UNIX minicom Serial Communication Program

By: parag dhake

parag dhake — Fri, 13 Jan 2012 12:02:42 +0000

hello friends,
we are doing a project on pci driver.
our project is write pci driver and use functionality of ARM7 through uart.
i am done with pci driver, now i want to check our driver for full fledge.
i have a problem, when i am starting comunication between two pc using db9 connectors, who will first start the communication get full data & another side some data gets lost may be starting data.
plz tell me that how i will minimizes this problem?
what will i do in driver?
i am use platform “linux”………….
Rgards
parag
dhakeparag81@gmail.com

By: rajeev

rajeev — Sat, 24 Sep 2011 12:24:50 +0000

Hi all,
I had installed minicom in my Linux PC with “Linux localhost.localdomain 2.6.23.1-42.fc8 #1 SMP Tue Oct 30 13:55:12 EDT 2007 i686 i686 i386 GNU/Linux” installed. when i run minicom i can watch my unit booting
Welcome to minicom 2.2

OPTIONS: I18n
Compiled on Sep 25 2007, 06:13:56.
Port /dev/ttyS0

Press CTRL-A Z for help on special keys

RomBOOT
>Start AT91Bootstrap…

U-Boot 2008.10 (Sep 19 2011 – 17:57:15)

DRAM: 64 MB
Initializing Display
NAND: 256 MiB
DataFlash:AT45DB642
Nb pages: 8192
Page Size: 1056
Size= 8650752 bytes
Logical address: 0xD0000000
Area 0: D0000000 to D00041FF (RO) Bootstrap
Area 1: D0004200 to D00083FF Environment
Area 2: D0008400 to D0041FFF (RO) U-Boot
Area 3: D0042000 to D0251FFF Kernel
Area 4: D0252000 to D083FFFF FS
*** Warning – bad CRC, using defaul

but when i try to type from keyboard i am unable to communicate to minicom
Distribution built by Analogics Tech Ind Limited,Hyderabad
Kernel 2.6.28-ATIL-H10 for armv5tejl
ATIL-H10 login:
i am unable to type a thing on minicom
pls help..
Regards,
Rajeev

By: robert

robert — Sun, 17 Apr 2011 17:37:44 +0000

I think the issue with the saving of the file is still there, but i think that might be down to not being able to get into root to save the file

By: robert

robert — Sun, 17 Apr 2011 17:26:37 +0000

Update… i have sorted it…. pressed enter and router>

By: robert

robert — Sun, 17 Apr 2011 16:48:32 +0000

I have done of the minicom set up, but when it comes to saving the file it states that i dont have the permissions to save the file as dft. Im not sure if i have to be in root to save the file. Currently using Kubuntu 10.10 at the moment. Trying to set up a Cisco Router.

By: mr.thinh

mr.thinh — Mon, 14 Mar 2011 18:37:19 +0000

dear . . .

I have ttyS0 , ttyS1, ttyS2 . I can see one of them only . How can i connect and use 3 of them at the same time ?

Thank you .

By: dustin

dustin — Tue, 01 Mar 2011 21:02:07 +0000

Thanks – the quick tutorial helped a lot

By: gtr

gtr — Mon, 15 Nov 2010 09:25:25 +0000

Thank you for sharing this information.
I like to know if we can use minicom to run in different config to different serial ports in one linux box? I have no problem in using minicom to /dev/ttyS0 (build-in). I add 2 more serial (PCI) and detected it as /dev/ttyS1 and /dev/ttyS2. Problem is when I use this 2 serial ports it says “offline”. cables are ok and devices connected to are all active. check it using /dev/ttyS0. Can anyone help me? TIA

By: Doudou

Doudou — Tue, 03 Aug 2010 17:39:14 +0000

hi,

I want to ask you the relationship between comgt and minicom. When i execute the command comgt, why I can find the information in the minicom window ?

Thanks.

By: PAgore

PAgore — Wed, 19 May 2010 19:20:16 +0000

Kewl!
Now i can use my grasshopper (ICnova AP7000 Base) in a colorful terminal! :D
$ minicom -c on

Thank You! :)

By: szmarcek

szmarcek — Sun, 28 Mar 2010 01:01:01 +0000

My router is linked to the db25 port via a rolled cable and a RJ45 to DB25 adapter and minicom did not work with /dev/ttyS0 or S1 and dmesg with grep ttyS* did not show anything but I noticed /dev/ttyUSB0 entry under /dev/ and when I set minicom to point to /dev/ttyUSB0 everyhting worked fine!

By: Saad Usmani

Saad Usmani — Fri, 29 Jan 2010 12:19:19 +0000

Working perfectly fine. JAY Hoo…

By: tobias

tobias — Tue, 03 Nov 2009 13:35:15 +0000

pls read some manuals and willingly learn.. “i have trouble please help me very much” is NOT the correct way of asking people to spend their spare time helping you.

By: Martin Paulus

Martin Paulus — Tue, 29 Sep 2009 18:23:43 +0000

In a response to above questions: please realize that minicom does not set up your serial ports, this is the job of your operating system. Also picking a random tty-name is not the best way to get a connection up and running. I would suggest looking up a serial connection howto on tldp.org (if you’re running Linux), or find some other appropriate documentation.

p.s. if `dmesg|grep tty` ‘presents you’ with a new prompt this means that there were no results. check greps behaviour by creating a text file and then use `fgrep WORD FILE` or `cat FILE|grep WORD` to check for words you know appear and some you know do not appear in this text file. when in doubt, consult the manual, please

By: Dave

Dave — Sat, 26 Sep 2009 23:37:48 +0000

Hi,

I use minicom on ubunto to connect via USB 2 serial device. When I type minicom -s and reach the Serial port setup I don’t find baud rate of 57600 to select from. Please advise.

Thanks,
David

By: allen

allen — Wed, 12 Aug 2009 01:44:46 +0000

I want to use minicom to connect with my embedded systerm,
‘dmesg |grep ttyS’ ,display ‘Xen virtual console successfully installed as ttyS0′
‘minicom -s /dev/ttyS0′,display ‘minicom: there is no global configuration file /etc/minirc._dev_ttyS0′
did u have the same problem?
thanks for help me out!

By: karuna

karuna — Sat, 08 Aug 2009 12:10:18 +0000

I am trying to connect router through linux but it is unsuccessful.
please suggest me what to do . I am using redhat linux 5.1

By: kuapao

kuapao — Thu, 16 Jul 2009 23:29:13 +0000

>Dave Uhring 02.12.08 at 12:35 pm
>
> Marco needs to edit /etc/default/kbd on his Solaris system to prevent such >accidental breaks. Uncomment the line:
>
> KEYBOARD_ABORT=alternate

This was most helpful, especially since I’m rusty in Solaris! Another file to check is /etc/system for the following line:
set abort_enable = 0

You want it set to 1 (default), if you want to be able to initiate a break or Stop-A.

By: harshada

harshada — Tue, 19 May 2009 07:53:29 +0000

I want to configure port no 12 to minicom, but under dev folder I didn’t found ttyS12. But I found ttysc. So I configured port to /dev/ttysc. But after exiting setup, an error is thrown like “cannot open /dev/ttysc: Input/output error”. How to overcome this error.
Thanks in advance.

By: arunprasad

arunprasad — Thu, 02 Apr 2009 09:49:03 +0000

hai,
i want send sms using gsm mobile using linux box.i need a C program to send the AT commands to gsm mobile.pls send me the details regrading