Greenhouse Monitor Server

Uploads data to Firebase for use with the greenhouse-monitor app.

Architecture Diagram

Requirements:

On the Pi running Bullseye

sudo apt install sense-hat git
pip install firebase_admin numpy

Google Cloud Billing

Enable billing for google cloud, you won't likely be charged for anything, this is to make Time to Live setup on the firestore database. See this resource.

Terraform

Install gcloud, terraform.

Run

gcloud auth application-default login

To authenticate with google cloud using your account.

Then run the following terraform commands to spin up the database and android app.

terraform init -upgrade
terraform apply

Extract the certificate from the state

terraform output -raw service-certificate > cert.json

Extract the json for android studio from the state and follow this guide. Or just add it to the root module folder your app, and use the assistant in Android Studio.

terraform output -raw google-services > google-services.json

Installation on the Pi

Clone this repo to the user pi's home directory as greenhouse-server. Take the cert.json and move it to the same directory. Move greenhouse-server.service to /etc/systemd/system/ Finally start the data collection server

systemctl enable --now greenhouse-server.service

Backups

You only really need to backup terraform.tfstate locally. This is so you can tear down the project. Keep this file safe.

Clean Up

To clean up

terraform destroy