31 lines
1.4 KiB
Markdown
31 lines
1.4 KiB
Markdown
Houseplant Hackathon
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====================
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What Is This?
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-------------
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This project is the result of an afternoon hackathon we ran where I work, the objectives of which were two fold:
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* Learn how to write a NodeJS app and deploy it to Google AppEngine
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* Connect the plant I have on my desk to the internet
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Since creating it I've migrated the project away from AppEngine and on to [Glitch](https://glitch.com) instead.
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How Does It Work?
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-----------------
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The hardware is built around a NodeMCU, which is an Arduino-compatible microcontroller with integrated WiFi. This is connected to a simple analog soil moisture sensor that's inserted into the soil itself. The moisture sensor came with a little circuit to convert the analog signal to a digital one, but it never worked so we threw it away.
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The arduino code takes a reading every hour and sends it to the app on Glitch, where it gets stored in a SQLite database. Once a week a cleanup job is triggered by [cron-job.org](https://cron-job.org) to remove readings older than 90 days from the database.
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Both the creation of a new reading and the cleanup cronjob expect that a secret key be included in order to authenticate the request.
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Links
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-----
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* [Glitch Project Page](https://glitch.com/~jasonsplant)
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* [GitHub Repo](https://github.com/JayWll/houseplant-hackathon)
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