Using minicom to connect to Elphel393 camera
Elphel393 series cameras have built-in USB to serial converter which allows users to get access to serial console. You need microUSB-USB cable to connect a camera to your PC and a terminal software installed on the PC. We use minicom on Kubuntu for this purpose so this short note will describe how to connect to a camera using minicom.
First, you need to install minicom on the PC if have not done it before. Open a terminal on your PC and use the following command on Debian based systems like Ubuntu or Kubuntu:
~$sudo apt-get install minicom
or do the same with your preferred package manager. minicom connects to a camera via /dev/ttyUSB0 device which is in dialout group by default:
~$ ls -l /dev/ttyUSB0 crw-rw---- 1 root dialout 188, 0 May 14 14:26 /dev/ttyUSB0
You should add your user to dialout group to make it easier to connect to camera without root permissions:
~$ sudo adduser elphel dialout [sudo] password for elphel: Adding user `elphel' to group `dialout' ... Adding user elphel to group dialout Done.
Now user elphel is in group dialout,
$ cat /etc/group | grep dialout dialout:x:20:elphel
but new settings have not been applyed yet:
~$ groups elphel adm sudo lpadmin sambashare libvirtd
You need to logout from the system and login again. Now your user is added to the group and new settings are applied:
~$ groups elphel adm dialout sudo lpadmin sambashare libvirtd
The last step is minicom configuration. minicom tries to connect to a device which is specified in its configuration file /etc/minicom/minrc.dfl and this device is not what we are trying to connect to. If you start minicom with its default config file you will get an error:
~$ minicom -c on minicom: cannot open /dev/tty8: Permission denied
It should be started in setup mode with root permissions:
~$ sudo minicom -s
Go to 'Serial port setup', change 'Serial Device'(A) to /dev/ttyUSB0, turn off 'Hardware Flow Control'(F), leave default 'Bps/Par/Bits' (E) at 115200 8N1 and 'Save setup as dfl' in the higher menu. Now you can start minicom
~$ minicom -c on
and it will connect to a camera.