Arduino 按鈕開三色燈

使用 Ywrobot 面板

String colourPicker(int r, int g, int b) {
       String r1, g1, b1;
       r1 = String(r, HEX);
       if(r < 16)
         r1 = "0"+r1;
       g1 = String(g, HEX);
       if(g < 16)
         g1 = "0"+g1;
       b1 = String(b, HEX);
       if(b < 16)
         b1 = "0"+b1;
       String rgbcolor = "#"+r1+g1+b1;
       return rgbcolor;
}
int LightRGBLED(int r_pin, int g_pin, int b_pin, String rgb)
{
   char *str = (char *)rgb.c_str()+1;
   int r, g, b;
   sscanf(str, "%02x%02x%02x", &r, &g, &b);
   analogWrite(r_pin, r);
   analogWrite(g_pin, g);
   analogWrite(b_pin, b);
}

String RandomColour( ) {
       String r1, g1, b1;
       int r = random(0,255);
       int g = random(0,255);
       int b = random(0,255);
       r1 = String(r, HEX);
       if(r < 16)
         r1 = "0"+r1;
       g1 = String(g, HEX);
       if(g < 16)
         g1 = "0"+g1;
       b1 = String(b, HEX);
       if(b < 16)
         b1 = "0"+b1;
       String rgbcolor = "#"+r1+g1+b1;
       return rgbcolor;
}
void setup()
{
  pinMode(2, INPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
  randomSeed(analogRead(3));


}


void loop()
{
    if (digitalRead(2) == 1) {
      LightRGBLED(9,10,11,colourPicker(0,0,0));
    } else {
      LightRGBLED(9,10,11,RandomColour());
    }

}