Multiple cameras question about realsense-ros HOT 6 CLOSED

As a user, which is the preferred use case:

1. Stream data from a realsense camera by giving the unique "serial number" of the camera as input (like in the launch file)
   OR
2. The ability for the nodelet to traverse all the connected realsense cameras, fetch their unique serial numbers and stream data from them.

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I would go with 1.

In my use case, I have multiple realsenses. I would like to have the device IDs of each realsense connected to be repeatable over system reboots. I feel connecting using a unique serial number would help.

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I would also like (1). I've tried to implement this functionality in the PR above, but it is flaky. As @prarobo said, opening multiple contexts in different processes does not seem to work well.

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We are currently working on implementing this feature. The first release with respect to this would be to uniquely identify a camera. Please refer to #18

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@liz-murphy @prarobo If you are interested in the progress of this issue, please refer to the closing comments of issue #18

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Fixed in release 1.0.3

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