#include <Adafruit_GFX.h>
#include <Adafruit_NeoMatrix.h>
#include <Adafruit_NeoPixel.h>
/*
* This sketch controls an Adafruit Neopixel Sheild (5x8 grid) and
* was designed to run on an Arduino Uno. I created it to replace the
* broken lighting system on my fiber-optic Christmas tree. The previous
* lighting system had used a halogen light and a rotating colored disk.
* This is quieter, energy efficient, and won't melt the plastic tree stand.
*
* This version does a simultaneous fade on tetris-like sections of the
* Neopixel sheild, replicating the "dope light" version of the original lighting
* system for the tree. This is the version I used.
*
* Written 12-24-2021
*/
Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(5, 8, 6,
NEO_MATRIX_TOP + NEO_MATRIX_RIGHT +
NEO_MATRIX_COLUMNS + NEO_MATRIX_PROGRESSIVE,
NEO_RGBW + NEO_KHZ800);
// define colors
int green[4]={255,0,0,0};
int red[4] = {0,255,0,0};
int blue[4] = {0,0,255,0};
int white[4] = {0,0,0,255};
// define squares on Neopixel sheild
// not using pixels on the edges because
// they're outside the tree's fiber optic radius
int a[6] = {1,2,9,10,17};
int b[6] = {3,4,11,12,20};
int c[6] = {5,6,13,14,22};
int d[6] = {18,25,26,33,34};
int e[6] = {19,27,28,35,36};
int f[6] = {21,29,30,37,38};
// wrote the fade as 4 steps because I could not
// get more than one for-loop to work in a function
// and it was Christmas Eve and this needed to get done.
void fadeStep1(int timer){
int colorA[4] = {0,0,255,0}; //blue
int colorB[4] = {0,255,0,0}; //red
int colorC[4] = {255,0,0,0}; //green
int colorD[4] = {0,0,0,255}; //white
setSquareColor(a,colorA);
setSquareColor(b,colorB);
setSquareColor(c,colorC);
setSquareColor(d,colorD);
//duplicate colors, for simplicity
setSquareColor(e,colorC);
setSquareColor(f,colorA);
matrix.show();
for (int i=0; i<255; i++){
colorA[2]=colorA[2]-1; //blue
colorA[1]=colorA[1]+1; //red
colorB[1]=colorB[1]-1; //red
colorB[0]=colorB[0]+1; //green
colorC[0]=colorC[0]-1; //green
colorC[3]=colorC[3]+1; //white
colorD[3]=colorD[3]-1; //white
colorD[2]=colorD[2]+1; //blue
setSquareColor(a,colorA);
setSquareColor(b,colorB);
setSquareColor(c,colorC);
setSquareColor(d,colorD);
//duplicate colors, for simplicity
setSquareColor(e,colorC);
setSquareColor(f,colorA);
matrix.show();
delay(timer);
}
}
void fadeStep2(int timer){
int colorA[4] = {0,255,0,0}; //red
int colorB[4] = {255,0,0,0}; //green
int colorC[4] = {0,0,0,255}; //white
int colorD[4] = {0,0,255,0}; //blue
setSquareColor(a,colorA);
setSquareColor(b,colorB);
setSquareColor(c,colorC);
setSquareColor(d,colorD);
//duplicate colors, for simplicity
setSquareColor(e,colorC);
setSquareColor(f,colorA);
matrix.show();
for (int i=0; i<255; i++){
colorA[1]=colorA[1]-1; //red
colorA[0]=colorA[0]+1; //green
colorB[0]=colorB[0]-1; //green
colorB[3]=colorB[3]+1; //white
colorC[3]=colorC[3]-1; //white
colorC[2]=colorC[2]+1; //blue
colorD[2]=colorD[2]-1; //blue
colorD[1]=colorD[1]+1; //red
setSquareColor(a,colorA);
setSquareColor(b,colorB);
setSquareColor(c,colorC);
setSquareColor(d,colorD);
//duplicate colors, for simplicity
setSquareColor(e,colorC);
setSquareColor(f,colorA);
matrix.show();
delay(timer);
}
}
void fadeStep3(int timer){
int colorA[4] = {255,0,0,0}; //green
int colorB[4] = {0,0,0,255}; //white
int colorC[4] = {0,0,255,0}; //blue
int colorD[4] = {0,255,0,0}; //red
setSquareColor(a,colorA);
setSquareColor(b,colorB);
setSquareColor(c,colorC);
setSquareColor(d,colorD);
//duplicate colors, for simplicity
setSquareColor(e,colorC);
setSquareColor(f,colorA);
matrix.show();
for (int i=0; i<255; i++){
colorA[0]=colorA[0]-1; //green
colorA[3]=colorA[3]+1; //white
colorB[3]=colorB[3]-1; //white
colorB[2]=colorB[2]+1; //blue
colorC[2]=colorC[2]-1; //blue
colorC[1]=colorC[1]+1; //red
colorD[1]=colorD[1]-1; //red
colorD[0]=colorD[0]+1; //green
setSquareColor(a,colorA);
setSquareColor(b,colorB);
setSquareColor(c,colorC);
setSquareColor(d,colorD);
//duplicate colors, for simplicity
setSquareColor(e,colorC);
setSquareColor(f,colorA);
matrix.show();
delay(timer);
}
}
void fadeStep4(int timer){
int colorA[4] = {0,0,0,255}; //white
int colorB[4] = {0,0,255,0}; //blue
int colorC[4] = {0,255,0,0}; //red
int colorD[4] = {255,0,0,0}; //green
setSquareColor(a,colorA);
setSquareColor(b,colorB);
setSquareColor(c,colorC);
setSquareColor(d,colorD);
//duplicate colors, for simplicity
setSquareColor(e,colorC);
setSquareColor(f,colorA);
matrix.show();
for (int i=0; i<255; i++){
colorA[3]=colorA[3]-1; //white
colorA[2]=colorA[2]+1; //blue
colorB[2]=colorB[2]-1; //blue
colorB[1]=colorB[1]+1; //red
colorC[1]=colorC[1]-1; //red
colorC[0]=colorC[0]+1; //green
colorD[0]=colorD[0]-1; //green
colorD[3]=colorD[3]+1; //white
setSquareColor(a,colorA);
setSquareColor(b,colorB);
setSquareColor(c,colorC);
setSquareColor(d,colorD);
//duplicate colors, for simplicity
setSquareColor(e,colorC);
setSquareColor(f,colorA);
matrix.show();
delay(timer);
}
}
// set the color of one of the predefined squares
void setSquareColor (int* square, int* color)
{
for (int i=0;i<5;i++){
matrix.setPixelColor(square[i],color[0],color[1],color[2],color[3]);
}
}
// set the color of the entire neopixel sheild
void fillSheild (int* color){
for (int i=0;i<64;i++){
matrix.setPixelColor(i,color[0],color[1],color[2],color[3]);
}
}
void setup() {
// put your setup code here, to run once:
matrix.begin();
matrix.show(); // Initialize all pixels to 'off'
}
void loop() {
// put your main code here, to run repeatedly:
fadeStep1(25);
fadeStep2(25);
fadeStep3(25);
fadeStep4(25);
}
