A Flask-based monitoring and automation system for indoor grow environments using a Raspberry Pi.

• Web Interface (Flask + HTMX)
• SCD41 Environmental Sensor (CO₂, Temp, Humidity)
• Soil Moisture Sensor Probe
• Relay-controlled:
  • Water Pump
  • LED Grow Light
  • Duct Fan(s)
• SQLite Database
• USB Camera Feed (Live MJPEG stream)

• Raspberry Pi OS / Debian-based Linux
• Python 3.8+
• SSH enabled
• I2C enabled (via raspi-config)
• USB Camera
• (Optional) Reverse proxy server with Nginx and Cloudflare Tunnel for external access

1. Clone the Repository

   git clone https://github.com/eddiegreysherman/smart-garden.git
   cd smart-garden

2. Set Up Virtual Environment

   python3 -m venv venv
   source venv/bin/activate
   pip install -r requirements.txt

3. Initialize the Database

   The database will automatically be created on first launch. It includes tables for:

   • Users
   • Sensor readings
   • System settings

Two systemd services manage background tasks:

This service reads CO₂, temperature, and humidity data from the SCD41 sensor and writes it to the SQLite database.

sudo cp systemd/scd41.service /etc/systemd/system/
sudo systemctl daemon-reload
sudo systemctl enable scd41.service
sudo systemctl start scd41.service

[Unit]
Description=SCD41 CO2 Sensor Service
After=network.target

[Service]
Type=simple
User=YOUR_USERNAME
WorkingDirectory=/home/YOUR_USERNAME/smart-garden
ExecStart=/home/YOUR_USERNAME/smart-garden/venv/bin/python -m app.utils.scd41
Restart=always
RestartSec=10
StandardOutput=journal
StandardError=journal
SyslogIdentifier=scd41-sensor

[Install]
WantedBy=multi-user.target

This service controls the relays for fan, light, and pump based on sensor data and threshold settings.

sudo mkdir -p /var/log/smart-garden
sudo chown YOUR_USERNAME:YOUR_USERNAME /var/log/smart-garden

sudo cp systemd/smart-garden.service /etc/systemd/system/
sudo systemctl daemon-reload
sudo systemctl enable smart-garden.service
sudo systemctl start smart-garden.service

[Unit]
Description=Smart Garden Control System
After=network.target

[Service]
User=YOUR_USERNAME
WorkingDirectory=/home/YOUR_USERNAME/smart-garden
Environment="PYTHONPATH=/home/YOUR_USERNAME/smart-garden"
Environment="PATH=/home/YOUR_USERNAME/smart-garden/venv/bin"
ExecStart=/home/YOUR_USERNAME/smart-garden/venv/bin/python /home/YOUR_USERNAME/smart-garden/app/control.py
Restart=always

[Install]
WantedBy=multi-user.target

Replace YOUR_USERNAME with the Linux user that owns and runs the project directory.

source venv/bin/activate
flask run -h 0.0.0.0

Then visit: http://your_pi_ip:5000

• Real-time:
  • Temperature (°F)
  • Humidity (%)
  • CO₂ levels (ppm)
  • Moisture status
• Device Status:
  • Light / Fan / Pump (On/Off)
• Charts:
  • 48-hour Temp + Humidity (Chart.js)
• Camera Feed (MJPEG)

• Thresholds:
  • Temperature, Humidity, CO₂
• Light Schedule:
  • Set ON / OFF times
• User Settings:
  • Change password
  • Set alerts
• Admin Features:
  • Add/Remove users

• Monitor readings via Dashboard
• Adjust environmental thresholds via Settings
• Set automated light cycles
• Add or manage users as admin

• Sensor Logs:

  journalctl -u scd41.service -n 50 --no-pager

• Database Backup:

  sqlite3 instance/smartgarden.db .dump > backup.sql

• Regular checks:

  • Sensor accuracy (monthly)
  • Password updates (quarterly)

Coming soon – the project is under active development!

• Some features like light intensity control are placeholders for future enhancements.
• Application is in active development – contributions & feedback welcome!