Data Generator for Project Happyswing

This generator is creating a stream of MQTT messages simulating up to 6 ESP32 boards sending accelerometer data while swinging.

Requirements

• Docker

How to run locally and develop

To just start node-red: docker compose up node-red

If you want to start all services: docker compose up -d

Services and web interfaces

• Node-Red: http://localhost:1880
• EMQX: http://localhost:18083, use client mqttx.app, user: admin, password: public
• Grafana: http://localhost:3000, user: admin, password: password
• Bind (DNS): Port 53

How to use in another project

docker-compose.yml:

version: "3"

services:
  generator:
    image: jodok/happyswing-generator:latest
    pull_policy: always
    container_name: generator
    environment:
      - NODE_RED_CREDENTIAL_SECRET=<YOUR_SECRET>
    ports:
      - "1880:1880"
    networks:
      - happyswing-net

networks:
  happyswing-net:
    name: happyswing-net

Reading material

How swings work (german), in subfolder docs: https://web.archive.org/web/20220419174726/http://www.didaktik.physik.uni-duisburg-essen.de/~backhaus/pdfs_fuer_Webseite/PG_Schwungbewegungen.pdf, Page 58

Simple pendulum calculator: https://rechneronline.de/rad/pendel.php