Neopixels node(!)

[phoddie]

This one is kind of fun. I recently committed a Neopixels Node for Node-RED MCU Edition. It is based on the Neopixels node for Raspberry Pi and works on ESP32 family and Pico W devices. It implements all colors and modes of the original, and all the animations. Here's a short video that uses a simple animation running on an ESP32-S3.

neopixels.mov

The flow shown in this video is very simple. It uses a complete node to receive a notification when the current animation completes. The complete node then causes "random color" node to choose another color.

Here's the JSON so you can give it a try:

flows.json

[
    {
        "id": "8471ec6d0c159c31",
        "type": "tab",
        "label": "neopixel demo",
        "disabled": false,
        "info": "",
        "env": []
    },
    {
        "id": "745e35dcb1b1886b",
        "type": "inject",
        "z": "8471ec6d0c159c31",
        "name": "",
        "props": [
            {
                "p": "payload"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": true,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "red,green,blue,white,cyan,yellow,purple,orange",
        "payloadType": "str",
        "x": 150,
        "y": 180,
        "wires": [
            [
                "5d799e649b54a1a3"
            ]
        ]
    },
    {
        "id": "eb234d064a2a6930",
        "type": "rpi-neopixels",
        "z": "8471ec6d0c159c31",
        "name": "",
        "gpio": 18,
        "pixels": "12",
        "bgnd": "",
        "fgnd": "",
        "wipe": "40",
        "mode": "pcent",
        "rgb": "grb",
        "brightness": "100",
        "gamma": false,
        "x": 550,
        "y": 180,
        "wires": []
    },
    {
        "id": "2420e7cde0ed735b",
        "type": "debug",
        "z": "8471ec6d0c159c31",
        "name": "",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "payload",
        "targetType": "msg",
        "statusVal": "",
        "statusType": "auto",
        "x": 550,
        "y": 260,
        "wires": []
    },
    {
        "id": "0d1014c10414c0e3",
        "type": "complete",
        "z": "8471ec6d0c159c31",
        "name": "",
        "scope": [
            "eb234d064a2a6930"
        ],
        "uncaught": false,
        "x": 130,
        "y": 260,
        "wires": [
            [
                "5d799e649b54a1a3"
            ]
        ]
    },
    {
        "id": "5d799e649b54a1a3",
        "type": "function",
        "z": "8471ec6d0c159c31",
        "name": "random color",
        "func": "const colors = context.get(\"colors\")\n\ndo {\n    msg.payload = colors[Math.trunc(Math.random() * colors.length)];\n} while (context.get(\"previous\") === msg.payload);\n\ncontext.set(\"previous\", msg.payload);\n\nreturn msg;\n",
        "outputs": 1,
        "noerr": 0,
        "initialize": "const colors = [\"red\",\"green\",\"blue\",\"white\",\"cyan\",\"yellow\",\"purple\",\"orange\",\"black\",\"pink\"]\n\ncontext.set(\"colors\", colors);\n",
        "finalize": "",
        "libs": [],
        "x": 340,
        "y": 220,
        "wires": [
            [
                "eb234d064a2a6930",
                "2420e7cde0ed735b"
            ]
        ]
    }
]

The Neopixels node works with the M5Atom Matrix which has a 5x5 grid of Neopixels. It should work with any Neopixels strand you have attached to your MCU.

[kitazaki]

It works on M5Atom Matrix by changing
"gpio": 18 -> 27
"pixels": "12" -> "25"
in flows.json

[kitazaki]

It works on M5Stack Fire by changing
"gpio": 18 -> 15
"pixels": "12" -> "10"
in flows.json

[phoddie]

I completely forgot that M5Stack-Fire has Neopixels too! Thank you for trying it out and sharing your positive result.