Elektro-Scrooge

A Telegram bot for monitoring spot prices of electricity. To sauna or not to sauna, that is the question.

The app pulls hourly spot prices for Nord Pool, and divides them into day (07:00-23:59) and night (00:00-06:59) segments.

Daily averages are calculated from the day segment only. Nightly prices are ignored.

The app adds electricity company margin, Finnish VAT, grid transfer fees and electricity tax to the spot prices, so all values shown are total prices per kWh.

Getting started

npm install
npm run build
npm run start

By default, when run locally, the program will do a dryrun, printing the HTML-formatted content of the messages instead of sending the messages to Telegram.

In order to send messages to Telegram, you'll need to setup a bot and a chat, and either disable the local dryrun, or deploy the program to AWS Lambda.

Testing

npm run build
npm run lint
npm run test

Deploying

There's unfortunately quite a lot of manual steps to completely deploy this project:

• Install canvas lambda layer https://github.com/charoitel/lambda-layer-canvas-nodejs
• Setup a Telegram bot and make a copy of secrets.example.yml into secrets.yml.
• Setup working AWS CLI credentials
• Download a font that you want to use and include it in the render.ts.

Finally:

npm install serverless
npm run build
npm run deploy