unable to visualize pointcloud data

[Hrithik-verma]

[ WARN] [1642414105.183307373]: MessageFilter [target=map ]: Dropped 100.00% of messages so far. Please turn the [ros.velodyne_pointcloud.message_filter] rosconsole logger to DEBUG for more information. [ WARN] [1642414105.183512721]: MessageFilter [target=map ]: The majority of dropped messages were due to messages growing older than the TF cache time. The last message's timestamp was: 686.699280, and the last frame_id was: velodyne

This is the warning I'm getting while launch velodyne_pointcloud. And in rviz pointcloud2 data is empty.

[RyodoTanaka]

This error occurs from ROS side problem. The problem comes from following reason.

1. You do not set use_sim_time parameter as true. To do that, you just run rosparam set use_sim_time true after the roscore started.
2. You mistakenly set target frame on rviz to map. To fix that, you need to set velodyne to the target frame.

[robograffitti]

I created #20 related to this issue.