Python project for a garden watering system based on a raspberry pi (3B+), DHT22, HL-83 and a EnerGenie Programmable power strip (EG-PM2)

The setup uses two external sensors. These are connected through GPIO with the Pi.

To work without changes, the HL-83 needs to be connected to GPIO 17. If you want to use a other pin change the pin variable in src/RainChecker.py.

The DHT22 needs to be connected to GPIO 4. If you want to use a other pin, cahnge the pin variable in src/TempChecker.py.

cd /tmp \  
&& sudo apt install pkg-config libusb-dev python python-pip python-openssl git -y \  
&& git clone https://github.com/adafruit/Adafruit_Python_DHT.git && cd Adafruit_Python_DHT \  
&& sudo python setup.py install \  
&& cd /tmp \  
&& wget -O sispmctl.tar.gz https://sourceforge.net/projects/sispmctl/files/latest/download \  
&& tar xzvf sispmctl.tar.gz \  
&& cd sispmctl-4.1 && ./configure && make && sudo make install \  
&& sudo ldconfig  
&& sudo echo 'pi ALL=NOPASSWD:/usr/local/bin' >> /etc/sudoers \  
&& sudo pip install --upgrade RPi.GPIO

Database cleanup runs every day 1 AM. 0 1 * * * /usr/bin/python /home/pi/garden/watering/cleanup.py >/dev/null 2>&1

The Pump Controll Check is the part of the software which switch the power of the pump on, and after 5 minutes off. The Cron runs every day 8 PM 0 20 * * * /usr/bin/python /home/pi/garden/watering/pump.py >/dev/null 2>&1

The main part (the temperature and rain check part) should be run as a service. This can be done as followed: touch /etc/systemd/system/weatherCheck.service

  Description=weather check service
  After=network.target
  StartLimitIntervalSec=0
  [Service]
  Type=simple
  Restart=always
  RestartSec=1
  User=pi
  ExecStart=/usr/bin/python /home/pi/garden/watering/main.py
  
  [Install]
  WantedBy=multi-user.target

Start the service: systemctl start weatherCheck Enable the service: systemctl enable weatherCheck