How to get LED rainbow run forever

Other Hardware Displays
1

I am coding the neopixel LED to go rainbow, but eventually the rainbow has to stop changing the color light and I don't know how to last the rainbow flash forever. Please help me solve this

#include <Adafruit_NeoPixel.h>
#define PIN 6
#define NUMPIXELS 3
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

 for(long firstPixelHue = 0; firstPixelHue < 5*65536; firstPixelHue += 256) {
    for(int i=0; i<pixels.numPixels(); i++) { 
      int pixelHue = firstPixelHue + (i * 65536L / pixels.numPixels());
      pixels.setPixelColor(i, pixels.gamma32(pixels.ColorHSV(pixelHue)));
    }
    pixels.show();
    delay(10);
2

Please post your full sketch rather than just a snippet of it

3

I am controling that Neopixel light by bluetooth.

#include <SoftwareSerial.h> 
SoftwareSerial mybluetooth(2,3);
#include <Adafruit_NeoPixel.h>
#define PIN 6
#define NUMPIXELS 3
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
char state;

void setup() {

pixels.begin();
 Serial.begin(9600); // Kết nối bluetooth module ở tốc độ 9600
mybluetooth.begin(9600);
pixels.begin();
}
 
void loop() {
 pixels.clear();

  
  
  if(mybluetooth.available() > 0){
   // Đọc giá trị nhận được từ bluetooth
   state = mybluetooth.read();
  Serial.println(state);
  Serial.println("");
 } else {
   state = 0;
   }
   if(state == '1')
   for(int i = 0; i<NUMPIXELS; i++){
    pixels.setPixelColor(i, pixels.Color(255,140,0));
    pixels.show();
   } if (state == '2'){
  for(long firstPixelHue = 0; firstPixelHue < 5*65536; firstPixelHue += 256) {
    for(int i=0; i<pixels.numPixels(); i++) { 
      int pixelHue = firstPixelHue + (i * 65536L / pixels.numPixels());
      pixels.setPixelColor(i, pixels.gamma32(pixels.ColorHSV(pixelHue)));
    }
    pixels.show();
    delay(10);
  }
}}
4

Do you want the rainbow effect to repeat without the need to send a '2' again ?

If so then remove the line of code that sets state to 0 when nothing is available from Bluetooth

5

SoftwareSerial and neopixel libraries are basically enemies of each other. Because the neopixel libraries disable interrupts while updating the strip and SoftwareSerial relies on interrupts, I think that your chances are slim that it will work reliably.

6

No I mean when i send the data 2 the color changing gonna keep running until there is another data send to it

7

I'm using them all the time, it's okay i guess. I need the serial to send the data.

8

That is what I was describing when I said

Have you tried my suggestion ?

9

Who is "them"? The combination of SoftwareSerial (to receive) and Neopixel library?

10

Remove this from loop()

11

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