WS2812B flicker when if statement is being used

Other Hardware LEDs and Multiplexing
1

I'm getting serial data from my digital piano and that data arduino uses to control the leds I have 2m/144 strip.
My issue is that when I use the if statement in the loop the leds noticeable flicker with each more note being held. If I use while instead of if that issue is gone but then I have the leds being lit when the notes are not held if I hold more than 3 notes at the time and with if that doesn't happenes but flickering does.

2

You have two if in the loop. Which is issue?

4

The first one if (Serial.available() > 0 {
}

If I change the if to while it works fine but leds are being held even tho my keys are not held thats the case with more than 3 keys being held if I play more those leds light up and are getting held even if i let go. It goes back to normal if 3 notes are being held no more than that. That doesn't happen with if at the beginning of the loop but then my leds flicker if I play more than one key...

5

I think the problem is that the Arduino code does not know when you stop pressing the note, so it does not know when to turn the led off.

I don't think this can be fixed by changing the Arduino code. The code sending the bytes may need to change also.

7

It tells the LEDs to go black immediately, not when you stop pressing the note.

9

Does your digital piano have a MIDI output? If it does, that is the usual way to control LEDs like this. The MIDI signals will tell the Arduino when a note is pressed and when a note is released.

10

I think that you forget to add FastLED.show(); at the end of this code:

11

I want to use it on my pc too so I can't directly connect the arduino to midi output from the piano. So I have to use serial data and control leds like that

12

I will try my arudino is not opening the port luckily on a laptop it still works. Getting the IDE from the site not from the windows store...

13

I don't know much about MIDI, but I am beginning to think I may know more than you do.

15

Programmable LED strip flickering = Power supply issue.

Post a schematic and an image of your project.

17

I was able to fix my issue. It was just bad code and I had to figure what went wrong.