Easily read rotary encoder buttons that also incorporate a push button, like Adafruit Rotary Encoder.

https://www.adafruit.com/product/377

This is a simple wrapper library for the wonderful Encoder Library that provides a couple of small additional convenient methods.

It returns delta instead of absolute values, which makes it easier to use Rotary in applications, and also provides support for detecting and handling button press. In this case we do not care about holding a button, or double clicking, which are all possible valid applications. We are making the most simple obvious single button press really easy to use, which was my goal.

For the rotary, it should have 3 pins on the side. Side pins are A and B, middle one is ground.

For the button, right one is ground (if facing knob with 2 pins upfront), the other one is the input pin. Note that library enables pull up resistor on the input pin.

• Encoder

To run the example, also need

• Simple Timer

#include <RotaryEncoderWithButton.h>

// pinA, pinB, pinButton
RotaryEncoderWithButton rotary(2,3,4);

void setup() {
	Serial.begin(9600);

	// required to initialize the button pin, and the library
	// assumes built-in pull up resistor is used
	rotary.begin();
}

void loop() {
    long delta = rotary.rotaryDelta();
    if (delta > 0) {
        // turned right
    } else if (delta < 0) {
        // turned left
    }

    if (rotary.buttonClicked()) {
        // button was clicked
    }
}

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Added some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request

Konstantin Gredeskoul, @kig, http://github.com/kigster

MIT. See LICENSE file for more details.