Discover Programming 
We used the new control board V4.0 with USB Serial Chip CP2102 instead of official arduino board.
How to DIY a robotic arm to complee mulitple movements? With this keystudio robitic arm kit, you are able to DIY your own controllable mehcanical arm using ARDUINO Microcontroller.  It uses board and 2 joysticks modules to control the angle degree of 4 servos. With this 4DOF robot arm kit,  you can get everything you need for arm installation and debugging. 
 
3 Controlling methods:
1. Controlloing through wired joystick
2. Phone Bluetooth Controlling  (note: HC-06 Bluetooth Module not included, only provide the test code for Blue tooth and app for android phone)
3. Wireless PS2 joy stick conltrol ( not included, test code is provided)