Add a service for rebooting camera

[scheideman]

Preliminary Checks

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• This issue is not a question, bug report, or anything other than a feature request directly related to this project.

Proposal

Add a service to the ROS 2 node that allows you to reboot the device. Optionally, reboot the camera if it cannot grab images or connect to the camera after a timeout.

Note: this sort of behaviour could be implemented using the LifecycleNode interface. But I see that the ROS 2 wrapper switched away from using LifecycleNode in patch 3.3.1

Use-Case

Because USB cameras can be unreliable and disconnect due to vibration or other random occurrences I need to periodically restart the ROS 2 node and sometimes call the reboot function using another script.

If the wrapper had a service that allowed me to reboot the camera then I could call it if the publishing rate dropped below some threshold. Also, if the wrapper tried to reboot on startup when a camera is unreachable this would save me needing to run another script to reboot the cameras or manually unplugging and re-plugging the cameras.

Anything else?

No response

[peredwardsson]

I second the need for this. The camera node doesn't warn when its publishing rate decreases, i just notice other reliant nodes performing worse and worse. Any type of semiautomatic reboot would be great.