Update README

README.md

@@ -1,2 +1,26 @@
-# openmv_cam
-OpenMV Cam ROS package
+# OpenMV Cam ROS package
+
+This package provides an interface between the [OpenMV Cam](https://openmv.io/) and [ROS](http://www.ros.org/).
+
+Images are acquired by the camera and sent via USB to the ROS node which relays them as ROS image messages.
+
+## Getting started
+
+Connect the camera and copy the [main.py](util/main.py) file, either using the [OpenMV IDE](https://openmv.io/pages/download) or directly using the mounted storage device.
+Remember to reset the camera via the IDE or eject the storage device to prevent data loss.
+
+Launch the node as follows:
+
+```sh
+roslaunch openmv_cam openmv_cam.launch
+```
+
+By default, the node uses the following parameters:
+
+```sh
+roslaunch openmv_cam openmv_cam.launch device:=/dev/ttyACM0 topic:=/openmv_cam/image_raw compressed:=false
+```
+
+## License
+
+The OpenMV Cam ROS package is released under the [MIT License](LICENSE.md).