PCA9685 Servo Driver icon PCA9685 Servo Driver — Drive 16 servos over EZB I2C with a PCA9685 PWM controller, using ARC servo commands and hardware-timed outputs. Try it →

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There is this manual: manual Try looking it over.

Also check out Turtorials/Hardware Compatibility

It has ATD input ports for transfering analog to digital signals. Communication port: I2C and Serial U-Art. As for open and closed depends on how you design your system.