Difference between block and arrows?
![userHead](https://dfimg.dfrobot.com/dfPortrait2.png)
In the sample code there are 2 lines which get the position of the object. One is using COMMAND_RETURN_BLOCK the other is using COMMAND_RETURN_ARROW. What is the difference and do I have to use both in the program?
2020-11-03 05:20:23 The COMMAND_RETURN_ARROW is for the line tracking algorithm I'm pretty sure. Whereas the COMMAND_RETURN_BLOCK is returning position data for the object tracking algorithm. So if you are running the line tracking mode you will want to use the COMMAND_RETURN_ARROW and vice versa for the block.
nonnie1026
![userHeadPic](https://dfimg.dfrobot.com/dfPortrait2.png)