Abstract: The present project consists in the effective instrumentation of a robotic arm to control it, improving the precision of its movements and monitoring its position, to later control the movements of the arm. A graphical interface was created in the Processing platform that shows the position of each arm joint and at the same time it helps to manipulate its movements. The computer induces the Processing program to send instructions to the Arduino board based on the value of the virtual knob that the operator entered.