automated-hydroponics

Automated home garden using hydroponics concepts

Components

• Net cup for hydroponics: buy or 3d print (https://www.thingiverse.com/make:893504)
• Plant grow lights (https://www.aliexpress.com/item/1005001599994011.html)
• DHT22 temperature and humidity sensor (https://learn.adafruit.com/dht)
• Light/color sensor AS7341 (https://www.adafruit.com/product/4698)
  • Instructions: https://learn.adafruit.com/adafruit-as7341-10-channel-light-color-sensor-breakout?view=all
  • Datasheet: https://ams.com/documents/20143/36005/AS7341_DS000504_3-00.pdf/
  • Connecting with Arduino Uno - Arduino library: Adafruit AS7341
  • Connecting with ESP32 - Arduino library: https://github.com/DFRobot/DFRobot_AS7341
• PH meter - DIYmore pH Sensor PH-4502C (https://www.aliexpress.com/item/32957428276.html)
  • Instructions: https://www.youtube.com/watch?v=zUEl3Y3yKL4&ab_channel=ElectronicClinic / https://www.electroniclinic.com/ph-meter-arduino-ph-meter-calibration-diymore-ph-sensor-arduino-code/ / https://cimpleo.com/blog/simple-arduino-ph-meter/ / https://scidle.com/how-to-use-a-ph-sensor-with-arduino/
  • Pins: V (Can be used with 5V and 3.3V compatible controller boards), GND, GND, Po (PH analog output), Do (3.3V pH limit trigger), To (analog temperature output)
• TDS sensor - (https://www.aliexpress.com/item/4001010691199.html)
  • Instructions: https://wiki.dfrobot.com/Gravity__Analog_TDS_Sensor___Meter_For_Arduino_SKU__SEN0244
  • Arduino library: https://github.com/DFRobot/GravityTDS
• Ultrasound mist - Water Atomization Grove actuator (https://www.seeedstudio.com/Grove-Water-Atomization-v1-0.html)
• Water level - HC-SR04 Ultrasonic Sensor
  • Instructions: https://howtomechatronics.com/tutorials/arduino/ultrasonic-sensor-hc-sr04/
• Fan 5V (https://www.adafruit.com/product/4468)
• Air pump 5V (https://www.adafruit.com/product/4700)
• Air stone (https://www.aliexpress.com/item/32942776713.html)
• Submersible Water pump 5V (https://www.banggood.com/DIY-Automatic-Irrigation-Module-Kit-Soil-Moisture-Detection-Automatic-Watering-Pumping-p-1338728.html, https://arduinotech.dk/shop/automatic-watering-system-diy-set-b/)
• 4 x Relays
• Camera - 5MP RPi camera module (https://www.elextra.dk/p/GS/H37933), or even better, a wide-lense camera module (https://www.aliexpress.com/item/32714486681.html)
• Waterproof temperature sensor (https://wiki.dfrobot.com/Waterproof_DS18B20_Digital_Temperature_Sensor__SKU_DFR0198_)

Schematics

RPi setup

# Choose Menu > Preferences > Raspberry Pi Configuration
#>> Change pi password
#>> Change hostname to what you would like your RPi to be named.
#>> Enable SSH and VNC
# (A reboot will be needed after these changes)

# Camera setup
# RPi camera setup instructions: https://www.raspberrypi.org/documentation/configuration/camera.md

# Install a web interface for controlling the camera and doing timelapses
# Install instructions: https://elinux.org/RPi-Cam-Web-Interface

# Check to see if Arduino is seen
Should see /dev/ttyACM0
ls /dev/tty*

# Install Arduino IDE on RPi, though optional
sudo apt-get install arduino

# Install Arduino CLI
curl -fsSL https://raw.githubusercontent.com/arduino/arduino-cli/master/install.sh | BINDIR=/usr/local/bin sh
# Might need to fiddle a bit on where it is installed

arduino-cli core update-index
arduino-cli board list

# Install platform core for board Arduino Uno/Mega
arduino-cli core install arduino:avr

# Clone this project
cd ~
git clone https://github.com/petcupaula/automated-hydroponics.git

# Install Arduino libraries
# You can search for libraries using: arduino-cli lib search DHT
arduino-cli lib install "DHT sensor library"
arduino-cli lib install "Adafruit AS7341"
arduino-cli lib install "OneWire"
# Libraries to be installed from zip files - files will go into  /home/pi/Arduino/libraries/
cd /home/pi/Arduino/libraries/
git clone https://github.com/DFRobot/GravityTDS.git

# Test compile and upload from cmd line:
cd ~/automated_hydroponics
arduino-cli compile --fqbn arduino:avr:uno arduino_hydroponics/arduino_hydroponics.ino 
arduino-cli upload -p /dev/ttyACM0 --fqbn arduino:avr:uno arduino_hydroponics

# To communicate between Arduino and Raspberry Pi via serial, there are 
# three scripts that can be used

# The `arduino_com.py` sends a message via serial to the Arduino, which in turn returns sensor data
python3 arduino_com.py

# The `mqtt_client.py` is an enhanced version of that, but sends the data to an MQTT broker. 
# (Note: certificates will be required that are not included in this repo)
# Path to certificates can be added in config.py (see config_template.py for what is expected)
python3 mqtt_client.py

# Install Adafruit IO for sending and receiving data from Adafruit IO's MQTT broker
sudo pip3 install adafruit-io
# To communicate with Adafruit IO, and subscribe to the `hydroponics feed`
python3 aio_client.py

# To ensure the aio_client.py (or mqtt_client.py) are run at Raspberry Pi reboot:
sudo nano /etc/rc.local
# Add the following line before the exit:
sudo bash -c '/usr/bin/python3 /home/pi/automated-hydroponics/aio_client.py > /home/pi/Desktop/log.txt 2>&1' &
# Test it by restarting the Raspberry Pi:
sudo reboot
# And after reconnecting check that the python script is running:
ps aux | grep python

# That is it.

Dashboard and command center

Example created in Adafruit IO: