1. Jon rigby and chad hager
Automated Greenhouse
Jon rigby and chad hager

2. Overview
The Automated Greenhouse is an Arduino based self-sustaining, low maintenance, growing system designed to fit on a shelf.
This system is intended for people desiring to grow plants without the hassle of maintaining a garden.  
It will feature internet connectivity, aeroponic watering, fertilizer control, light scheduling, and climate control.

3. Intended users
Organic fruits and vegetables have more than doubled in the last decade to a 30 billion dollar industry.
The Automated Greenhouse will grow small fruits, vegetables and designer plants such as orchids.

4. Comparable Items
No products combine countertop space efficiency, internet connectivity, climate control, and aeroponic growing into one easy to use system.
The system shown to the left fits well on a countertop but needs to be watered manually does not connect to the internet or control the climate.
Found a system similar to ours on Indiegogo but it failed.

5. Aeroponics
Aeroponic is a method of growing plants without the use of soil as a growing medium. The plants are suspended in air and are misted with a water/fertilizer solution.
Aeroponic growing uses less water and fertilizer than soil.
Plants grow much faster with Aeroponic growing due to the high level of oxygen.

6. Overall system
The Automated Greenhouse will have an Arduino as a microprocessor.
The Arduino will maintain the systems and alert the user if needed.

7. Project Requirements
The Automated Greenhouse will notify the user if it needs water or fertilizer
The system will measure the Electrical Conductivity (EC) of the solution
The system will measure the pH of the solution
The system will mix the fertilizer to the required specification
The Automated Greenhouse will keep the internal temperature at a set temperature

8. Project Requirements
The system will turn the lights on and off at specific times
The system will create a web interface
The Automated Greenhouse will fit on a countertop
The system will run off 120 VAC
The Automated Greenhouse will be reliable

9. Will notify the user for water and fertilizer
The system will be able to measure the amount of liquid in the reservoirs for water and fertilizer. The measurement will be done with ultrasonic distance sensors which send out a small pulse of noise and wait for the response.
The level of the liquid will be viewable on the web interface and an LED will illuminate on the device when the level is less than 20 percent.

10. Measuring Electrical conductivity
Measuring the EC of the solution will be done with an electrical conductivity probe and a circuit to convert it into a 0-5 volt signal.
The EC can determine the amount of fertilizer present

11. Measuring Electrical conductivity

12. Measuring pH
Measuring the pH of the solution will be done with a pH probe and a circuit.

13. Measuring pH

14. Measuring pH
-1V at probe V at probe

15. Mix Fertilizer
The system will mix the fertilizer based on the user defined levels.
The system will use the EC and pH of the solution to determine the amount of each liquid to add.
The solution will keep a constant height of the solution.

16. Climate Controlled
The system will have a Pelletier cooling chip to maintain the temperature of the inside of the greenhouse.
The system can change the temperature of the environment by changing the polarity of the voltage applied to it.

17. Lighting Controlled
The light system will be built from 3 watt LED bulbs.
The LED lights are efficient and do not produce much heat.
Different lighting schedules based on plant type.

18. Internet Connectivity
The sytem will connect to the internet over a 2.4 Ghz wifi chip.
The Automated Greenhouse will broadcast a WIFI signal

19. Graphical interface
The system will publish its own web server for the user to connect to.
Refill indicator lights off

20. Graphical interface
The system will publish its own web server for the user to connect to.
Refill indicator lights on

21. Countertop size
The Automated Greenhouse will be 24 inches long, 12 inches deep, and 18 inches tall.
It will take up 3 cubic feet, roughly the size of a large microwave.
It will be visually appealing for kitchens and visible areas.

22. Countertop Weight
The entire system will weigh approximately 10 pounds without liquids.
There are 1.5 gallons of liquid total which will add pounds.
The entire functional weight will be 25 pounds.

23. Power
The Automated Greenhouse will be able to be plugged into a 3 prong U.S. standard wall outlet.
It will internally convert all the power to DC for the Arduino and electronics.
The system will use a computer power supply to provide the power.
The system will use a Ground Current Leakage detector on the input of the system for safety.

24. Power Assuming max power use scenarios
Will have power saving mode to turn off non essential items

25. REliable The Automated Greenhouse needs to be reliable.
There needs to be little to no maintenance.
Every system will have error checking and redundancy.
The reservoirs will have multiple sensors to avoid flooding.

26. Cost

27. Test Component: pH Probe pH Control Routine EC Probe
EC Control Routine
Lighting Control System
Reservoir Correction Routine
Temperature Control System
Water Level Control System
Low Level Indicator LED’s
GUI:
Menu
Display Parameters
User Inputs
Web Publishing/Viewing
System:
Environmental Control System
User Interface

28. Test Electrical Conductivity meter pH meter Temperature meter
Calibrate the EC meter vs an accurate EC meter. Measure various liquids to see if they both give the same reading.
pH meter
Calibrate the pH meter vs an accurate pH meter. Measure various liquids to see if they both give the same reading.
Temperature meter
Calibrate the Temperature meter vs an accurate Thermometer. Measure various room temperatures.

29. Test Reservoir Control Algorithm Lighting Algorithm Web Interface
Set the reservoir pH, fertilizer, and height levels and see if the system holds them constant. Adjust algorithm as necessary.
Lighting Algorithm
Make sure the lights turn on and off at defined intervals.
Web Interface
Access the web interface from various devices and operating systems to make sure it properly displays on all.

30. Test
Overall System
Set the system up to run an entire plant life cycle without intervention. Check to make sure it is running properly and the physical structure does not crack.

31. Risks
Connecting to the internet through various routers and internet providers.
The system needs to connect to different types of password protection WEP,WPA, ETC.
The system needs to have a reliable connection.
The plant does not live
We miscalculated what it takes to keep a plant alive and the project fails.
People stop caring about organic eating
We are assuming the demand for organic eating continues to go up.

32. Risk 1 Probability x Consequence x Performance x Cost x Schedule
Electrical Conductivity not accurate
Imperative for proper functionality of the system
If it does not work, we will have to purchase a commercial EC which will cost over 150 dollars. x
Consequence
Potential Degradation
Sys Reqt not Achieved x
Performance
Increase >10%
Element Increase > 50% x
Cost
System Increase > 40%
Element Increase x
Schedule

33. Risk 1 Probability x Consequence x Performance x Cost x Schedule
Code not being reliable
The code gets stuck or does not perform the intended actions.
Troubleshooting the code will take time to perfect. x
Consequence
Potential Degradation
Sys Reqt not Achieved x
Performance
Increase >10% x
Element Increase > 50%
Cost
System Increase > 40%
Element Increase x
Schedule

34. Schedule

35. Action Register