Adafruit ANO Rotary Navigation Encoder to I2C Stemma QT Adapter

The Adafruit ANO Rotary Navigation Encoder to I2C Stemma QT Adapter is a handy breakout board that simplifies connecting the ANO rotary encoder wheel, a user interface element reminiscent of the iconic iPod click wheel, to your microcontroller via I2C.

This breakout board comes with an onboard microcontroller programmed with the 'seesaw' firmware that tracks pulses and button presses from the rotary encoder and five switches. It saves incremental values accessible over I2C for easy querying.

Simply solder in the ANO Directional Navigation and Scroll Wheel Rotary Encoder (not included) onto this adapter for seamless rotary input functionality. The adapter supports power from 3 to 5V and logic levels of 3 or 5V on the I2C data lines. The INT pin can alert your microcontroller when input changes occur, avoiding constant polling.

Multiple I2C addresses are selectable via solder jumpers or programmable commands, enabling up to 16 units on one I2C bus.

Note: This is the adapter PCB only; the rotary encoder is not included and must be purchased separately. Some soldering is required to attach the encoder to the adapter.

• Compatible with any microcontroller supporting I2C, including Arduino UNO and Raspberry Pi.
• Onboard microcontroller runs Adafruit’s seesaw firmware.
• Supports five buttons plus rotary encoder input.
• Selectable I2C address with up to 16 devices on one bus.
• Powered from 3 to 5V DC.
• INT pin signals input activity to microcontroller.
• Six 0.1" spaced breakout pads for easy breadboard use.

Use it with the official Arduino library or CircuitPython/Python code provided by Adafruit.