README.md

ClickWheel

Arduino clickwheel controller with MPR121.

I am using Adafruit MPR121, did not test with other MPR121 breakouts.

How to design the PCB?

There are good articles here and there about how to do it.

Who did the job ?

• This code is originally from Adafruit MPR121 Library
• Then it's been adapted to handle click wheel by Peter A Jansen to handle click wheel
• I just changed a few lines here and there to make it fit my use case.

How to use ?

#include <Arduino.h>
#include "clickwheel.h"

ClickWheel clickWheel = ClickWheel();

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

 while (!Serial) { // needed to keep leonardo/micro from starting too fast!
   delay(10);
 }
 
 Serial.println("Clickwheel test "); 
 
 // Default address is 0x5A, if tied to 3.3V its 0x5B
 // If tied to SDA its 0x5C and if SCL then 0x5D
 if (!clickWheel.begin(0x5A)) {
   Serial.println("MPR121 not found, check wiring?");
   while (1);
 }
 Serial.println("MPR121 found!");
 clickWheel.initTouchWheel(4, -20 ,1);
 delay(100);
 clickWheel.takeWheelBaseline();

}

void loop() {
 int16_t deltaWheel = clickWheel.getWheelIncrement();  
 Serial.print("deltaWheel ");
 Serial.println(deltaWheel);
 delay(100);
}