More than 512 leds, no light comes through

[davidboon78]

I'm using an ESP32 and trying to get 1024 LEDs to run, but if I make numLeds more than 512, even 513, the entire light array goes black. Some investigation finds that onDmxFrame sets sendFrame to 0 every time it's called. I tried to eliminate sendFrame but the FPS seems to drop significantly. Any suggestions?

const int lastUniverse=startUniverse+maxUniverses;

void onDmxFrame(uint16_t universe, uint16_t length, uint8_t sequence, uint8_t* data)
{
if(universe<startUniverse||universe>lastUniverse)
return;

// read universe and put into the right part of the display buffer
for (int i = 0; i < length / 3; i++)
{
int led = i + (universe - startUniverse) * (previousDataLength / 3);
if (led < numLeds)
leds[led] = CRGB(data[i * 3], data[i * 3 + 1], data[i * 3 + 2]);

}
previousDataLength = length;
FastLED.show();
}

[rstephan]

Here are my questions/advices for you. (I am guessing, the ArtnetWifiFastLED-Example is used.)

• Is the initTest() working? Show all LEDs the red/green/blue pattern at start?
• Removing sendFrame-behavior is a bad idea! With 512 LEDs your frame rate will drop to 1/3, with 1024 to 1/6!
• The FastLED.show();-call takes time. You can find some calculations here: Latency When Writing to 620 LEDs (1860 Channels) #31 (comment)
• Send the universes in a row, with no gap, e.g.: 0,1,2 wait 0,1,2 wait. NOT: 1,3,4 wait 1,3,4

I will try to replicate your setup, but this will take some time.

[davidboon78]

• the test works fine, all leds light up.
• yeah that's what I'm finding.
• I'm using resolume to send the universes. Each one with 510 channels.

Thanks for any help. If I can solve it myself ill let you know.