npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

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.

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 🙏

© 2024 – Pkg Stats / Ryan Hefner

node-red-contrib-keemmer-crc16

v1.0.0

Published

A Node-RED node to convert crc16 modbus rtu

Downloads

5

Readme

node-red-contrib-qmaker-crc16

A Node-RED node to ping a remote server, for use as a keep-alive check.

Install

Either use the Editor - Menu - Manage Palette - Import option or run the following command in your Node-RED user directory - typically ~/.node-red

npm install node-red-contrib-qmaker-crc16

Gotchas

1 Ubuntu Snap containers are strict and do not like giving external commands (like ping) external access. To allow ping to work you must manually add the network-observe interface

 sudo snap connect node-red:network-observe

2 On some versions on Raspbian (Raspberry Pi) ping seems to be a root only command. The fix is to allow it as follows

sudo setcap cap_net_raw=ep /bin/ping
sudo setcap cap_net_raw=ep /bin/ping6

Usage

Pings 1 or more devices and returns the trip time in mS as msg.payload.

Returns boolean false if no response received, or if the host is unresolveable.

msg.error will contain any error message if necessary.

msg.topic contains the ip address of the target host.

There are 2 modes - Timed and Triggered.

  • Timed mode - this is the default mode that pings your devices on a timed basis. Default ping is every 20 seconds but can be configured.
  • Triggered mode - this mode permits you to trigger the ping by an input message. If the Target is left blank and msg.payload is a string or array, you can ping 1 or more devices on demand.

Refer to the built in help on the side-bar info panel for more details.