Using Raspberry pi to maintain the critical grow room parameters
Python 100.00%
hydroponic-room-automation's Introduction
Hydroponic-Room-Automation
What is Hydropnic?
Hydroponics is a subset of hydroculture, which is a method of growing plants without soil by instead using water
Hydroponic room is any room where hydroponic fodder is grown in controlled condition
Hydroponic fodder is a cultivation of nutritious green fodder (grass) in water medium with added nutrients in it
We can use seeds like Barley, Oats, Maize, Wheat, Jowar, Bajra to grow hydroponic fodder
Why Automation is required?
Since we are not using soil medium, to grow healthy fodder we have to control below important parameters
Temperature
Humidity
Watering interval and time
Ventilation
Air circulation
We cant maintain all above paramaters by mannual labour
Using Raspberry pi and few sensors we can easily automate the whole process.
List of material
Raspberry Pi
5V, 2A charger and micro USB charging cable
5V, 1A charger and micro USB charging cable
5V 10A 8 channel relay (For resistive load)
5V 30A single relay baord (For indusctive load)
Adafruit DHT22 temperature & humidity sensor
Optocoupler EL817
USB hub
0.5 HP submersible water pump
Four 60W exhaust fans
Two 50W ventilation fan
One 130W Air Cooler ( A.C is better than cooler)
UPS (To save RPi from electricity outage and for safe shutdown)
I have design my ouwn UPS but there are many solutions available in market
How many minutes do I have to run the fans?
It depends on the room size
My room size is 15x18x9 => 2430 cub.ft => 69 cub.mtr
Inlet and exhaust fan capacity is 450 cu.mtr/hr => 7.5 cu.mtr/min
Since i am using 2 inlet and 2 exhaust fans, it will take approx 4.6 min to replace the air in the room
What is temp and humidity range?
It depends on seed type.
I am using Maize seeds for which temp range is 25°C to 35°C and humidity range is 40% to 70%
How it works
Please refer hydroponic.py for source code
Raspberry pi will start the hydroponic.py on boot
All the configurations and stats are stored in SQLite DB file (hydroponic.db)
Table 'exhaustonofftime' contains timing for exhaust fans on and off state
Table 'inletfanonofftime' conatins the timings for inlet fan on and off state
Table 'pumponofftime' contains the timings for pump on and off state
Table 'ventilationfanonofftime' contains the timings for ventilation fans on and off state
Table 'deviceid' contains the details of the devices.
Table 'sensors' contains the sensor details
Table 'sensordata' in transactional table where all the sensor readings are stored
Table 'pistats' is transactional table where pi usage details are stored.
Application will read all the configurations from DB and store in disctionary objects
In while loop app will reacord the hour minute value after every 5 seconds
This value will be compared against config data to start or stop the device
App will laso take the temp and humidity reading after every 10 seconds.
If the temp is >= 32 then app will start the cooler rest all the time cooler remain stopped
I am also using lightweight 'bottle' server. Running on localhost and 8080 port.
Configured route '/hydroponic' to provide the simple GUI to user to start/stop any device.
If you want to do this please follow the guide 'Hydroponic SD Card Setps'
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