Neopixel

Github Repo	C Header	C source	JS source
mongoose-os-libs/neopixel	mgos_neopixel.h		api_neopixel.js

mgos_neopixel_create

struct mgos_neopixel *mgos_neopixel_create(int pin, int num_pixels,
                                           enum mgos_neopixel_order order);

Create and return a NeoPixel strip object. Example:

struct mgos_neopixel *mystrip = mgos_neopixel_create(
    5, 16, MGOS_NEOPIXEL_ORDER_GRB);
mgos_neopixel_set(mystrip, 0, 12, 34, 56);
mgos_neopixel_show(mystrip);

mgos_neopixel_clear(mystrip);
mgos_neopixel_set(mystrip, 1, 12, 34, 56);
mgos_neopixel_show(mystrip);

mgos_neopixel_set

void mgos_neopixel_set(struct mgos_neopixel *np, int i, int r, int g, int b);

Set i-th pixel's RGB value. Each color (r, g, b) should be an integer from 0 to 255; they are ints and not uint8_ts just for the FFI.

Note that this only affects in-memory value of the pixel; you'll need to call mgos_neopixel_show() to apply changes.

mgos_neopixel_clear

void mgos_neopixel_clear(struct mgos_neopixel *np);

Clear in-memory values of the pixels.

mgos_neopixel_show

void mgos_neopixel_show(struct mgos_neopixel *np);

Output values of the pixels.

mgos_neopixel_free

void mgos_neopixel_free(struct mgos_neopixel *np);

Free neopixel instance.

JS API

NeoPixel.create

NeoPixel.create(pin, numPixels, order)

Create and return a NeoPixel strip object. Example:

let pin = 5, numPixels = 16, colorOrder = NeoPixel.GRB;
let strip = NeoPixel.create(pin, numPixels, colorOrder);
strip.setPixel(0 /* pixel */, 12, 34, 56);
strip.show();

strip.clear();
strip.setPixel(1 /* pixel */, 12, 34, 56);
strip.show();

strip.setPixel

strip.setPixel(i, r, g, b)

Set i-th's pixel's RGB value. Note that this only affects in-memory value of the pixel.

strip.clear

strip.clear()

Clear in-memory values of the pixels.

strip.show

strip.show()