About

A webapp for:

• Collecting temperature data from my LK Systems (https://www.lksystems.no/) floor heating system though the LKSystems cloud server (https://my.lk.nu/)
• Storing historical data in a database and present them as graphs in dashboard.
• Optimized and tailored for my own LKSystem installation with 5 temperature sensors, but may serve as basis for other projects as well.

Implemented using typescript, node, mysql db.

Based on lksystems that fetched data from local webserver (old LKSystems webserver)

Tested on

Tested locally on MAC with node v11.15.0

Preconditions

• Add your lk system credentials (cloud login credentials) in a lk_credentials.env file

LK_USERNAME=<your username in the lksystem cloud>
LK_PASSWORD=<your password in the lksystem cloud>

• If running locally (not docker) you need to have node/npm etc. installed (Tested on MAC with node v11.15.0)
• docker etc. installed

Build and run everything in docker

You can build and run both db and application as docker containers simply by:

npm install

Build image self-containing image for the webapp:

docker build -f Dockerfile-webapp . -t lksystem-web-app

Build self containing image for mysql that includes creation of database if not exists from before:

docker build -f Dockerfile-sql . -t lksystem-sql

These commands are also in the script: build_for_all_docker.sh

Start up everything:

docker-compose up

Build and run locally

You can run the application locally by

npm install

• start database locally (i.e by commenting out the app part in docker-compose and run docker-compose up)
• replace db with localhost in DataBase.ts:

   :
   this.dbConnection = mysql.createConnection({
   host: 'db', // use of running in docker
   //host: '127.0.0.1', // use if running locally (not docker) ?
   :

run npm run serve with environment variables. For example on MAC:

LK_USERNAME=<LK system username> LK_PASSWORD=<LK system password> npm run serve

(TODO: Add alternative environment variable methods in this README)

You can of course also edit the files, build containers and run docker-compose up, but it increases the development round-trip delay...

Test it

Webapp should now be available at localhost:3000/dashboard

It uses the api at api/days, example: localhost:3000api/data?days=7

Synology

I've launched the application on my Synology NAS that supports docker (not all Synology NAS supports docker). You need to

• Add the two images to the NAS docker.
• Copy the docker-compose.yml over to the NAS to a directory
• Add a file called lk_credentials.yml with your LKSystems credentials (ref preconditions) to the same directory

To avoid "hassle" with user/group/provileges etc. you can from that directory just run:

sudo docker-compose up

Note that from a security standpoint this is NOT RECOMMENDED. I'm sure it's possible to it the "proper" way but I've not spent time on it.

Some references

Code based on previous working code using older infrastructure: https://github.com/hellange/lksystems

Initial setup of project based on: Build an API with Node.js, Express, and TypeScript (https://www.split.io/blog/node-js-typescript-express-tutorial/) Initial RxJs/RxHR setup info found here: Asynchronous JavaScript: Using RxJS Observables with REST APIs in Node.js (https://www.twilio.com/blog/async-js-rxjs-observables-rest-api-nodejs) ++