work in progress

Goal: Create a talking plant that tells you when it wants water and a pinch of Big Data.

A Raspberry Pi Zero combined with Seeed Grove Temperature and Moisture Sensor. Maybe more Sensors later, currently expensive.

Postgresql Database for storing the Data.

Grafana Web Dashboard which is connected to the Database, to display the current and historic data.

sudo apt install postgresql

sudo apt-get install -y grafana
sudo /bin/systemctl enable grafana-server
sudo /bin/systemctl start grafana-server

Now we're going to define the service to run this script:

cd /lib/systemd/system/
sudo nano plant.service

The service definition must be on the /lib/systemd/system folder. Our service is going to be called "plant.service":

[Unit]
Description=Plant
After=multi-user.target

[Service]
Type=simple
ExecStart=/usr/bin/python /home/pi/app.py
Restart=on-abort

[Install]
WantedBy=multi-user.target

Here we are creating a very simple service that runs our script and if by any means is aborted is going to be restarted automatically. You can check more on service's options in the next wiki: https://wiki.archlinux.org/index.php/systemd.

Now that we have our service we need to activate it:

sudo chmod 644 /lib/systemd/system/plant.service
chmod +x /home/pi/app.py
sudo systemctl daemon-reload
sudo systemctl enable plant.service
sudo systemctl start plant.service

For every change that we do on the /lib/systemd/system folder we need to execute a daemon-reload (third line of previous code). If we want to check the status of our service, you can execute:

sudo systemctl status plant.service

In general:

sudo systemctl status plant.service

sudo systemctl start plant.service

sudo systemctl stop plant.service

sudo journalctl -f -u plant.service

https://gist.github.com/emxsys/a507f3cad928e66f6410e7ac28e2990f#service-for-the-script