Asked
— Edited
Dr. Howard Marner would like to know, "Well, why wasn't I notified?" that there is now a green LED around the camera for JD? 
Inverse Kinematic Arm
— Control robot arms with inverse and forward kinematics, converting X/Y/Z positions into joint motion and reporting end-effector location.
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The newer camera that began shipping in nearly 2 years ago has a green led instead of blue.