Hey there, got up and running with a nodemcu 1.0 board, 2811 light strip,

Eric_Weintraub · July 3, 2017, 1:03pm

Hey there, got up and running with a nodemcu 1.0 board, 2811 light strip, and FastLED sketch from here: https://github.com/bruhautomation/ESP-MQTT-JSON-Digital-LEDs/blob/master/ESP_MQTT_Digital_LEDs/ESP_MQTT_Digital_LEDs.ino

So it all works great (well other then the connectors suck and I keep losing signal, another post about that later)

What I really would love some help with is something super simple. I want to be able to set a static colors for each of the corners as well the centers a different color as well. That’s it. I have 78 drivers each powering 3 pixels. I tried to figure it out but failed to understand the existing sketch very well.

I know what I want to do is super basic so I am hoping someone can get me started in the right direction. The overall idea is for example with 4th of July have a static layout of colors red, white, and blue. For game day have team colors, etc… I figured I would create each as a effect.

Thanks in advance and super awesome project you guys and gals have here!

Jason_Coon · July 3, 2017, 1:37pm

Looks great! What have you tried so far? You should just be able to set the leds like:

leds[0] = CRGB::Red;

Post any attempts you’ve made in code at http://gist.github.com or http://pastebin.com (not in the comments here), and you’re more likely to get help.

Eric_Weintraub · July 3, 2017, 2:37pm

Will give it a shot, but if I understand correctly,

leds[0] = CRGB::Red;

Would be the first driver is red?

Then could I do

leds[1] = CRGB::Blue;

and so on?

also is it possible to define a range like:

leds[0-49] = CRGB::Red;

for the first 50? Sorry I don’t know C, mostly a nodejs kind of guy. ** I think that would cause a math operation which I dont want but would I have to define each of the 78 drivers directly (which I can do if I have to)

Once I have that basic understanding I can get to work and show an example on http://pastebin.com

Jason_Coon · July 3, 2017, 4:17pm

Yeah, exactly. For ranges, you can either use a for loop:

for(byte i = 0; i < 50; i++) {
leds[i] = CRGB::Red;
}

Or you can look at using RGBSet: https://github.com/FastLED/FastLED/wiki/RGBSet-Reference

Eric_Weintraub · July 3, 2017, 4:42pm

Thanks Jason, just want I needed to know. Feel kind of silly now not thinking C had for loops lol… Ill test things out later and report back.

marmil · July 4, 2017, 1:38am

Here’s an example using CRGBSet you can use for reference or modify to your pixel type and NUM LEDS and try out.

github.com

marmilicious/FastLED_examples/blob/master/CRGBSet_example.ino

// Marc Miller, Jan 2016

#include "FastLED.h"
#define NUM_LEDS 32

//CRGB leds[NUM_LEDS];  // Not using this.  Using CRGBArray instead.
CRGBArray<NUM_LEDS> leds;

CRGBSet partA(leds(6,9));  // Define custom pixel range with a name.
CRGBSet partB(leds(22,25));  // Define custom pixel range with a name.

CHSV colorOne(0,222,255);  // Define a custom color.
CHSV colorTwo(82,222,255);  // Define a custom color.

//---------------------------------------------------------------
void setup() { 
  FastLED.addLeds<LPD8806, 11, 13, GRB>(leds, NUM_LEDS);
  FastLED.setBrightness(255);
}

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Eric_Warnke · July 4, 2017, 8:08pm

This is an additional routine for demoreel for the holiday. https://gist.github.com/brontide/34eab8071e69f28e368af7e01cd3466e

Eric_Weintraub · July 5, 2017, 2:36pm

Thanks again Gentleman! Been a busy few days and going out of town in a day or two but going to try them all out, will post what I come up when I return. This was exactly the help I needed to craft something