Coding 4-wire Neopixel with Particle

[ScruffR]

The AP102 (aka DotStar but not Neopixel) protocol is really simple and best used in connection with the DMA capabilities of the hardware SPI interfaces on the device.
Here you find a really simple sample how to talk to these without the need for any extra library

When I connect chain of LED strips to power from both ends, do I need to make the power line disconnect in the middle?

And that does nothing else then combining the RGB components into on 32bit number and placing that integer in a pixel buffer at position px. Just like this #define LEDCOUNT 300 uint32_t pxBuffer[LEDCOUNT]; // actually for the APA102 protocoll you need some extra bytes for leadin/leadout //uint32_t pxBuffer[1 + LEDCOUNT + LEDCOUNT/16 + 1]; // element 0 (leadin) ... LEDs ... 1 leadout clock per 2 LEDs (ceil) bool needRefresh; volatile bool canRefresh = true; uint32_t setAPA102Color(int px, ui…

About FastLED, you may want to file an issue on the contributors GitHub repo.