Navio LED & PWM servo driver (PCA9685 hardware device), connected via I2C.
Navio uses the NxpPca9685Device as a dual-purpose PWM and LED driver, i.e. for servo control and the high intensity RGB status LED. It is connected via the I2C bus. See http://docs.emlid.com/Navio-dev/servo-and-rgb-led/ for more information. NxpPca9685Device