ESP8266 Community Forum

Posted: **Fri Apr 24, 2015 4:41 pm**

I've seen some example code for the regular ESP sdk, but nothing that works with the Arduino SDK. I've been trying to port over this library: https://github.com/sfranzyshen/ws2812esp8266 but while I got it building in the Arduino IDE, I haven't had success yet getting it to work.

Does anyone have a working library for NeoPixels / WS8212 LEDs that they can share?

Posted: **Fri Apr 24, 2015 6:40 pm**

Sorry, nothing to share yet, but this is on my list for next week to start looking into.

Posted: **Fri Apr 24, 2015 7:19 pm**

This and the u8glib... are my most wanted modules....

I'm well out of my league trying to get them to work myself though... I've only been writing c / arduino for 4w.

Posted: **Sat Apr 25, 2015 10:20 pm**

I've got it working on my project just using the SPI driver. Connect the WS2812 input pin to GPIO13.

Call SPI.begin() in your setup() code. Then, this (I have led_colors[] as an array of unsigned ints with 0xRRGGBB values):

Code: Select all

  for (int i = 0; i < NUM_LEDS; i++)
  {
    uint32_t out = (led_colors[i] & 0xFF) | ((led_colors[i] & 0xFF00) << 8) | ((led_colors[i] & 0xFF0000) >> 8);
    for (int b = 0; b < 24; b++)
    {
    SPI.transfer((out & 0x800000) ? 0xFF : 0xE0);
    out <<= 1;
    }
  }

I tried at first using just GPIO bit banging but every once in a while there's a delay inserted (I assume it's an interrupt for something) which throws off the protocol.

ESP8266 Community Forum

[SOLVED] Anyone get NeoPixel / WS8212 LEDs working?

[SOLVED] Anyone get NeoPixel / WS8212 LEDs working?

Re: Anyone get NeoPixel / WS8212 addressable LEDs working?

Re: Anyone get NeoPixel / WS8212 addressable LEDs working?

Re: Anyone get NeoPixel / WS8212 addressable LEDs working?