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description
Initialize the Feature Design (FD) tracking system in any project

Initialize Feature Design (FD) System

Set up a lightweight feature tracking system in the current project. Creates directory structure, index, templates, slash commands, and CLAUDE.md conventions.

Argument

Recipe: from MQTT to InfluxDB via Node-RED

2024-05-16 adds case study explaining how to extract values from topic strings, and how to specify the measurement name in the message payload provided to the "influxdb out" node.
2023-12-02 revise graphics to correspond with "influxdb out" node, and explain the pros and cons of InfluxDB 1.x vs InfluxDB 2.

Introduction

Getting data produced by IoT sensors into a database is practically a mandatory step before effective visualisation (eg dashboards).

This recipe shows you how to get an MQTT payload into an InfluxDB database using three Node-RED nodes. It makes the following assumptions:

Hyperlinks (a.k.a. HTML-like anchors) in terminal emulators

[ Update 2025-03-24: Commenting is disabled permanently. Previous comments are archived at web.archive.org. ]

Most of the terminal emulators auto-detect when a URL appears onscreen and allow to conveniently open them (e.g. via Ctrl+click or Cmd+click, or the right click menu).

It was, however, not possible until now for arbitrary text to point to URLs, just as on webpages.

Requirements

Minikube requires that VT-x/AMD-v virtualization is enabled in BIOS. To check that this is enabled on OSX / macOS run:

sysctl -a | grep machdep.cpu.features | grep VMX

If there's output, you're good!

	#!/usr/bin/env bash

	#
	# _______\| \|_ ____
	# \|_ / _ \ __\|_ /
	# / / __/ \|_ / /
	# /___\___\|\__/___\|
	#
	# A note taking app for the terminal.
	#

	#!/usr/bin/env bash

	set -Eeuo pipefail
	trap cleanup SIGINT SIGTERM ERR EXIT

	script_dir=$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd -P)

	usage() {
	cat <<EOF
	Usage: $(basename "${BASH_SOURCE[0]}") [-h] [-v] [-f] -p param_value arg1 [arg2...]

	hidutil property --set '{"UserKeyMapping":[{"HIDKeyboardModifierMappingSrc":0x700000035,"HIDKeyboardModifierMappingDst":0x7000000E1}, {"HIDKeyboardModifierMappingSrc":0x700000064,"HIDKeyboardModifierMappingDst":0x700000035}]}'

	cat << 'EOF' > ~/.keymappings && chmod +x ~/.keymappings
	hidutil property --set '{"UserKeyMapping":[{"HIDKeyboardModifierMappingSrc":0x700000035,"HIDKeyboardModifierMappingDst":0x7000000E1}, {"HIDKeyboardModifierMappingSrc":0x700000064,"HIDKeyboardModifierMappingDst":0x700000035}]}'
	EOF

	sudo /usr/bin/env bash -c "cat > /Library/LaunchDaemons/org.custom.keymappings.plist" << EOF
	<?xml version="1.0" encoding="UTF-8"?>
	<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
	<plist version="1.0">

	Hi,

	I've been contacted by a talent acquisition associate offering me recruiting
	services. He reached out to me directly on my personal cell phone number. I
	asked him where he got my number and he said that his company invested in "an
	API plugin called Lusha".

	As an EU-based individual and in accordance to the General Data Protection
	Regulation, I would like:

	const applyTemplate = (templateElement, data) => {
	const element = templateElement.content.cloneNode(true);
	const treeWalker = document.createTreeWalker(element, NodeFilter.SHOW_ELEMENT, () => NodeFilter.FILTER_ACCEPT);

	while(treeWalker.nextNode()) {
	const node = treeWalker.currentNode;
	for(let bindAttr in node.dataset) {
	let isBindableAttr = (bindAttr.indexOf('bind_') == 0) ? true : false;
	if(isBindableAttr) {
	let dataKeyString = node.dataset[bindAttr];

	var str = 'class ಠ_ಠ extends Array {constructor(j = "a", ...c) {const q = (({u: e}) => {return { [`s${c}`]: Symbol(j) };})({});super(j, q, ...c);}}' +
	'new Promise((f) => {const a = function* (){return "\u{20BB7}".match(/./u)[0].length === 2 \|\| true;};for (let vre of a()) {' +
	'const [uw, as, he, re] = [new Set(), new WeakSet(), new Map(), new WeakMap()];break;}f(new Proxy({}, {get: (han, h) => h in han ? han[h] ' +
	': "42".repeat(0o10)}));}).then(bi => new ಠ_ಠ(bi.rd));';

	try {
	eval(str);
	} catch(e) {
	alert('Your browser does not support ES6!')
	}