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OpenIPC Wiki

Table of Content

Questions and answers

How to find original MAC address in a firmware dump

strings dumpfile.bin | grep ^ethaddr

How to configure ssh session authorization by key

On the camera: Open an ssh session and create a non-empty password for the root user. By default, in our firmware the root user does not have a password. Keep in a mind that after you have created a password, all subsequent new ssh sessions will require authorization with this password until the moment you set up the public key authorization, as well as when trying to log in from a computer which does not povides such key. Don’t forget it!

passwd

On the desktop: Copy the public key to the camera by logging in with the password created above.

ssh-copy-id root@192.168.1.666

On the camera: Create a .ssh folder in the root user’s home directory and copy the file with the authorized keystore into it.

mkdir ~/.ssh
cp /etc/dropbear/authorized_keys ~/.ssh/

On the desktop: Open a new session to verify that the authorization is passed using the public key not requesting a password.

ssh root@192.168.1.666

Majestic

How to get a memory dump for debugging?

Enable and configure Core Dump in the menu Majestic > Majestic Debugging.

Camera image has a pink tint

You need to specify the GPIO pins to control the infrared filter. The settings for some cameras can be found in the table. If your camera is not in the table, then you will need the ipctool utility.

The OpenIPC firmware will automatically download the latest version of the utility to the /tmp directory when ipctool is invoked first time. On native firmware, you will need to download the utility to the camera yourself using the tools available in the system: wget, curl, tftp… For example, download the ipctool utility to TFTP server on the local network, then download it to the camera:

tftp -g -r ipctool -l /tmp/ipctool 192.168.1.1
chmod +x /tmp/ipctool
/tmp/ipctool

If the camera has internet access, you can try to mount a public NFS sharing and run the utility from it, without downloading to the camera:

mkdir -p /tmp/utils
mount -o nolock 95.217.179.189:/srv/ro /tmp/utils/
/tmp/utils/ipctool

After the utility is downloaded to the camera, run the ipctool gpio scan command in the terminal and open-close the camera lens a couple of times with your palm. Watch the output of ipctool to determine the pins responsible for controlling the IR filter curtain. Enter the values obtained in the settings for the night mode Majestic. If the pink tint still persists, you may need to enable sensor signal inversion.

Don’t forget to add the camera model and found GPIO values to the table!

Is it possible to display the data for setting the auto focus of lenses instead of the current sample_af in the standard /metrics?

No, this is a difficult algorithm, it does not have a sense to run it this way.

Copy files from Linux system to camera

Sometimes you need to transfer files to the camera. In addition to the above method using NFS (Network File System) you can use the standard Linux scp command to copy files over an SSH connection:

scp ~/myfile root@192.168.1.65:/tmp/

This command will copy myfile from the home directory to the /tmp directory on the camera. On recent Linux systems the following error may occur:

sh: /usr/libexec/sftp-server: not found
scp: Connection closed

Add -O option in this case:

scp -O ~/myfile root@192.168.1.65:/tmp/