The ANO Rotary Navigation Encoder breakout has 9 pins. Here are the details.

• ENCA - This is the rotary encoder A pin.
• ENCB - This is the rotary encoder B pin.
• SW1 - This pin is the center button.
• SW2 - This pin is the down button.
• SW3 - This pin is the right button.
• SW4 - This pin is the up button.
• SW5 - This pin is the left button.
• COMA - Common pin A. Set to ground or VCC - usually ground - so that you can use the microcontroller internal pull-ups for the button/encoders. You can also use a GPIO pin and pull it low.
• COMB - Common pin B. Set to ground or VCC - usually ground - so that you can use the microcontroller internal pull-ups for the button/encoders. You can also use a GPIO pin and pull it low.