https://github.com/borkdude/balcony-hs

Should I water my balcony?
https://github.com/borkdude/balcony-hs

command-line-tool email-sender haskell

Last synced: 15 days ago
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Should I water my balcony?

• Host: GitHub
• URL: https://github.com/borkdude/balcony-hs
• Owner: borkdude
• License: bsd-3-clause
• Created: 2018-08-01T21:08:04.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2018-08-06T07:21:20.000Z (over 6 years ago)
• Last Synced: 2024-10-04T16:11:46.463Z (about 1 month ago)
• Topics: command-line-tool, email-sender, haskell
• Language: Haskell
• Size: 22.5 KB
• Stars: 13
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: ChangeLog.md
  • License: LICENSE

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README

        

# balcony

This program lets me know if I should water my balcony at night.  It collects

temperature data from https://www.weatherbit.io/ during the day into

PostgreSQL. At the end of the day it sends an e-mail with the average

temperature, if it was over 20 degrees Celcius. I could probably take into

account more data like precipitation but this is a good start.

I implemented this idea before in [Clojure and

ClojureScript](https://github.com/borkdude/balcony), but in those versions I

didn't need the database since I used a historical API. That API is not free

anymore and I don't want to pay 35 dollars a month for a reminder about watering

my balcony. Since the requirements changed, I decided to do it in Haskell for

fun and to learn something new.

## Installation

### PostgreSQL

Create a new login user (default name `balcony`) and a database (default name

`balcony`) and execute `ddl.sql` with that user.

### Environment

Set the following environment variables. Those with defaults are optional.

    BALCONY_SMTP_HOST (default smtp.gmail.com)

    BALCONY_SMTP_USER

    BALCONY_SMTP_PASS

    BALCONY_DB_NAME (default balcony)

    BALCONY_DB_HOST (default localhost)

    BALCONY_DB_PORT (default 5432)

    BALCONY_DB_PASS (default empty string)

    BALCONY_WEATHER_API_KEY

    BALCONY_MAIL_FROM

    BALCONY_MAIL_TO (comma separated string)

    BALCONY_MAIL_BODY (optional body template where {{avg}} will be replaced with the average)

### Building

    stack build

    stack install

### Cron

Trigger the program via cron. I log every hour from 9 to 18 and send an e-mail

at 19.

    crontab -e

    0 9-18 * * * /usr/bin/env bash -c '. $HOME/.profile ; balcony-exe log'

    0 19 * * * /usr/bin/env bash -c '. $HOME/.profile ; balcony-exe mail'