GrowController

A GrowController that measures temperature and humidity. A dehumidifyer can be managed by an active solenoid. The project is based on a RaspberryPI 2B and DHT22 sensor.

Setup

1. Create a new python env to manage python modules

python -m venv /path/to/new/virtual/environment

2. Install dependencies using requirements.txt

pip install -r requirements.txt

Running script on bootup

We use a systemd service in order to start the script as soon as the PI boots up.

1. Create a unit file to define the custom service

sudo nano /lib/systemd/system/GrowController.service

2. Add following text, make sure to replace user with your local user

[Unit]
Description=My GrowController Service
After=multi-user.target

[Service]
Type=idle
WorkingDirectory=/home/user/Programming/GrowController/SensorBox
ExecStart=/home/user/Programming/GrowController/env/bin/python3.11 /home/user/Programming/GrowController/SensorBox/humidity.py > /home/user/Programming/logs/GrowController.log 2>&1
Restart=always

[Install]
WantedBy=multi-user.target

3. Add permissions on the unit file

sudo chmod 644 /lib/systemd/system/GrowController.service

4. Configure systemd and reboot

sudo systemctl daemon-reload
sudo systemctl enable GrowController.service
sudo reboot

5. To check if the service is running use

sudo systemctl status GrowController.service