Pkg
Stats

npm package discovery and stats viewer.

Discover Tips

General search
[free text search, go nuts!]
Package details
pkg:[package-name]
User packages
@[username]

Sponsor

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Twitter
@PkgStats
GitHub
pkgstats
Twitter
@ryanhefner
GitHub
ryanhefner
Site
ryanhefner.com

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

Framework
react / react-dom
Server
next / express / next-routes
Data Store
redux / react-redux / next-redux-wrapper / redux-thunk / redux-logger
Caching
lru-cache
CSS / Styling
next-page-transitions / styled-components
Typeface
@ibm/plex
Avatars
gravatar
Data Viz
chart.js / react-sparklines
Date formatting
dayjs
Infinite scrolling
react-scroll-trigger
Markdown rendering
react-markdown
Repository url parsing
hosted-git-info
User data
npm-user
Compiling
babel-plugin-module-resolver / babel-plugin-styled-components
Types
prop-types
Odds & Ends
es6-promise / isomorphic-fetch

© 2025 – Pkg Stats / Ryan Hefner

node-red-contrib-tca9554

v1.0.4

Published

3 years ago

The basic Node-RED node for GPIO Expander TCA9554 connected to boards like the Raspberry Pi

Downloads

22

0High
0Medium
0Low

node-red Pi GPIO TCA9554 I2C raspberry

node-red-contrib-tca9554

Node-Red node for Raspberry Pi with TCA9554 GPIO expander connected via I2C. Works with Raspberry Pi OS and Advantech Industrial Raspberry Pi 4 HAT Gateway Kit: UNO-220. Warning: currently this nodes didn't work properly with system image on SD included in the Advantech Kit.

Node Features

Each gpio pin (0-7) can be set as input or output
Input can read actual state
Output can activate high or low state

Install

Install with Node-Red Palette Manager or run npm command:

cd ~/.node-red
npm install node-red-contrib-tca9554

Usage

run raspi-config to enable I2C in nodes configuration choose correct pin number, I2C address and Bus for input inject msg.payload = true/1 for high state and false/0 for low state for output inject any value to trigger reading

Usage

Tested on

Raspberry Pi 4, with Raspberry Pi OS on Host.
Raspberry Pi 4, on Docker contaier.

With docker you need to add folowing line to docker run command:

docker run ... --device /dev/i2c-1 --user=root --privileged ...