Turn LEDs off on startup

[OrmeAudio]

Hi! Fantastic work!

Is it possible to turn all led's (ws2812b) off on startup ? Or not turn them on ?

At the moment all led's turn white, I would like to avoid the power surge.

My cpp is a bit rusty, but I'm happy to do a PR if you point me in the right direction.

Thanks!

[ulri-me]

Hi,

I have never worked with this lib and the WS2812b LEDs.

But have a look at this reddit discussion:
https://www.reddit.com/r/arduino/comments/d5yjmt/ws2812b_default_color_after_power_on/

The question is if the library does anything itself to start the LEDs with full white.

As far as I can see the only DMX output buffer initialisation with a default value is this line

ESP8266_ArtNetNode_v2/libs/espDMX_RDM/espDMX_RDM.cpp

Line 384 in 4a1f803

memset(_dmx->data1, 0, 512);

which stores 0 as default value for a newly created DMX buffer.

And for the LED strip itself does this line

ESP8266_ArtNetNode_v2/source/startFunctions.ino

Line 113 in 4a1f803

pixDriver.setStrip(0, DMX_TX_A, deviceSettings.portAnumPix, deviceSettings.portApixConfig);

execute this function

ESP8266_ArtNetNode_v2/source/ws2812Driver.cpp

Line 29 in 4a1f803

void ws2812Driver::setStrip(uint8_t port, uint8_t pin, uint16_t size, uint16_t config) {

which also clears the buffer to 0's by calling this function

ESP8266_ArtNetNode_v2/source/ws2812Driver.cpp

Line 70 in 4a1f803

void ws2812Driver::clearBuffer(uint8_t port, uint16_t start) {

[ulri-me]

So I would assume you have to be faster with starting the output (or even start the output before powering up the LED strip) or get this capacitor trick from Reddit to work.