Rotary encoder

This project drives the spark fun RGB rotary encoder with pushbutton and RGB LED.

It's currently tested on Arduino Uno and ESP32

Install:

• Name the extracted/cloned folder "rotary" and put it in your Arduino/libraries folder.
• Restart Arduino
• File->Examples->Rotary to get started.

REFERENCE:

http://cdn.sparkfun.com/datasheets/Components/Switches/EC12PLRGBSDVBF-D-25K-24-24C-6108-6HSPEC.pdf http://cdn.sparkfun.com/datasheets/Components/Switches/EC12PLRGBSDVBF-D-25K-24-24C-6108-6H.pdf

Wiring

The pin names given in the library and this documentation are defined in Pin Definitions in rotary.h

Encoder:

ROTARY_PIN_A and ROTARY_PIN_B should both be interrupt pins (e.g. 2 and 3 on an Uno) and must be adjacent (e.g. use 12 and 13 on the ESP32).

You don't need pullup resistors for the example because it turns on the internal pullups.

Connect

• Rotary pin C directly to GND
• Rotary pin A to ROTARY_PIN_A.
• Rotary pin B to ROTARY_PIN_B.

LEDs:

• Connect R,G,B (pins 1,2,4 of the Rotary package) through 330Ohm current-limiting resistors to PIN_NOT_RED, PIN_NOT_GREEN, PIN_NOT_BLUE on Arduino.
• Connect Rotary package pin 5 (+5v) to +5v.

The LEDs have not been tested on ESP32 but should be target-independent.

Push button:

Pin 3 of the rotary package, the push button, connects to PIN_ROTARY_PUSH with a 10k pulldown resistor

Apologies

• I haven't read the API guidelines yet. I expect I have committed crimes here.
• The library uses quite a lot of resources two interrupt pins AND a timer ISR). But it's light on compute cycles at runtime.