rpi-ws281x | rpi-ws281x | Carousel library
kandi X-RAY | rpi-ws281x Summary
kandi X-RAY | rpi-ws281x Summary
rpi-ws281x
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rpi-ws281x Key Features
rpi-ws281x Examples and Code Snippets
Lines of Code : 51
License : No License
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var ws281x = require('rpi-ws281x');
class Example {
constructor() {
this.config = {};
// Number of leds in my strip
this.config.leds = 169;
// Use DMA 10 (default 10)
this.config.dma = 10;
//
var ws281x = require('rpi-ws281x');
class Example {
constructor() {
// Current pixel position
this.offset = 0;
// Set my Neopixel configuration
this.config = {};
// By setting width and height instead
var ws281x = require('rpi-ws281x');
class Example {
constructor() {
// Current pixel position
this.offset = 0;
// Set my Neopixel configuration
this.config = {leds:169};
// Configure ws281x
ws2 Community Discussions
Trending Discussions on rpi-ws281x
QUESTION
I am using this python package to control a led strip. Using PWM everything worked perfectly fine but it didn't allow me to run the script without sudo which is why I switched over to using SPI.
Now I get this weird behaviour where suddenly the entire led strip lights up but in kind of a gradient:
The strip is connected to GND, 5V, and GPIO10 / MOSI / Pin 19.
Example usage of the Strip:
...ANSWER
Answered 2022-Apr-04 at 09:16After hours of try and error, I decided to continue using PWM As this required the script to run with root, I outsourced the led controller in its own python program and used interprocess communication to get the needed information from the flask app to the led controller.
This controller program is automatically started as a system service - except for this service crashing at midnight this works fine.
QUESTION
I got a Flask App and installed the dependencies out of the requirements.txt. I got the following error when running my App:
...ANSWER
Answered 2022-Mar-22 at 16:17Use pipenv: https://pipenv.pypa.io/.
At least some time ago, Pip used to have some flaws in solving multiple packages dependencies. I now saw an update note on their documentation that seems to tackle the problem; haven't tested yet. Pipenv would solve the dependencies graph just fine. That was one of the reason I started using Pipenv.
Please, have a look at the following pages:
- https://realpython.com/pipenv-guide/ (pipenv; your scenario)
- https://pip.pypa.io/en/stable/topics/dependency-resolution/#backtracking (pip; recent update)
- https://stackoverflow.com/a/55826767/687896 (similar question)
QUESTION
I'm trying to install the library above on a Raspberry Pi 4 running Raspbian Buster / RetroPi .
Setup collects packages, and then fails on setup.py stating:
ANSWER
Answered 2021-Apr-26 at 16:14SuperStormer suggested sudo apt install python3-dev - which worked!
I have no idea why this works, as This post suggests that it's usage is for Python extensions, not regular libraries.
It apparently contains the Python C headers, so maybe the library needed those for some reason.
QUESTION
I am trying to use a C# library in my .net Core 5.0 project, which is a C# wrapper for a C Assembly for ws281x LEDs. The library requires the that the Shared C library (ws2811.so) be built before running the framework. I have successfully built and installed the C shared library into /usr/lib for my raspberry pi, and have tested it to confirm it works.
The issue lies in that within my Dockerfile, I don't know how/where to properly install this shared C library. My current dockerfile is as follows:
...ANSWER
Answered 2021-Mar-15 at 15:30Docker has the concept of a "build context". That defines the directory from which files are accessed. So when you say COPY foo /foo in your Dockerfile, that's copying the foo file from the build context and places it in the root folder of your container with the name foo. You set the build context when running the docker build command. Very often, people use . as the build context which means the current working directory that you're running the command from (e.g. docker build -t app .). So it depends on what directory your build context is. That's where you should be placing the .SO library so that you can then add a COPY instruction in your Dockerfile to copy it into your container image.
QUESTION
I am in the process of updating a NodeJS package, due to a breakage in NodeJS 14. This library makes use of C++ code. In NodeJS 12 the same code appears as a deprecation warning:
warning: ‘v8::Local v8::Object::Get(v8::Local)’ is deprecated: Use maybe version
With the code in question being:
...ANSWER
Answered 2020-Nov-23 at 04:40With some more digging, this seems to be the right approach. This is essentially pieced together base on the Nan docs and snippets I found around the net:
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