webcam_opencv interfacing

How to Install a USB Camera in diffential robot

Installing ROS OpenCV camera driver

sudo apt update

sudo apt install ros-noetic-cv-camera

Once you have this installed in your raspberry pi, you can plug it in a USB port and test it running this node:

source /opt/ros/noetic/setup.bash

rosrun cv_camera cv_camera_node

it wil publish image_raw and some more topics

Type rostopic list in terminal

If it works, then create a launch file for the node and also a static transform publisher from base_link to camera_link

Youtube video

https://youtu.be/A3CTi3QnZZ0!

Raspberry pi robot with webcam

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