The code presented on this page can be downloaded or found in the Arduino examples menu under Examples → SpinWearables → Dancing_with_Color → Grand_Finale.

Dancing with Color: Have the SpinWheel respond to both acceleration and rotation.

Here we include one final code example. This example is designed to be more complex than the previous examples and to inspire future work. For more information and other examples, refer to the dancing companion page.

These include statements should look familiar! As a reminder, they allow the program to access coding tools for the SpinWheel.

#include "SpinWearables.h"
using namespace SpinWearables;

The setup function should also seem familiar. As a reminder, the setup function is run once when the SpinWheel turns on. Also, SpinWheel.begin() prepares the LED to accept new colors.

void setup() {
  SpinWheel.begin();
}

Here, we initialize some variables that we will make use of later.

int offset = 0;
int colorChange;
uint8_t angle = 0; 

int a_cum = 0;

Instructions in a loop function are repeated over and over again, in other words, “in a loop”.

void loop() {

The readIMU function checks if the sensor is ready and takes its current rotation data.

  SpinWheel.readIMU();

First, we can add a “motion_snake” like in the previous sketch.

  if (abs(SpinWheel.gy) > 50) {
     // add 10 to make it spin at a reasonable speed
     angle = angle+10;
     SpinWheel.setSmallLEDsPointer(angle, 255, 255, 255);
  }

Rather than having the color of the large LEDs change based on the SpinWheel’s angular velocity, instead we can have the color change when the acceleration of the SpinWheel is sufficient.

  int a = abs(SpinWheel.ax);

Like r_cum in the Rainbow_Chase_Advanced sketch, a_cum is the sum of the SpinWheel’s acceleration in the x direction. We multiply the acceleration by 10 to have the color change be noticeable. We did a similar thing in the snake example.

  a_cum = a*10 + a_cum;

We will have some fixed “delay” between the numbers controlling each LED’s color. Change this number! What happens?

  int a_delay = 15;

We will have the inner and outer large LEDs light up the same color. The color of each pair will be governed by a slightly modified number.

  int a0 = a_cum % 255;
  int a1 = (a_cum+a_delay) % 255;
  int a2 = (a_cum+2*a_delay) % 255;
  int a3 = (a_cum+3*a_delay) % 255;

Here we finally set those colors.

  SpinWheel.setLargeLED(0, colorWheel(a0));
  SpinWheel.setLargeLED(1, colorWheel(a1));
  SpinWheel.setLargeLED(2, colorWheel(a2));
  SpinWheel.setLargeLED(3, colorWheel(a3));
  SpinWheel.setLargeLED(4, colorWheel(a0));
  SpinWheel.setLargeLED(5, colorWheel(a1));
  SpinWheel.setLargeLED(6, colorWheel(a2));
  SpinWheel.setLargeLED(7, colorWheel(a3));

Have the SpinWheel display the desired pattern.

  SpinWheel.drawFrame();
}