1. Smart Hydroponic Greenhouse December 8, 2016
Lemon costs $1
Midway Design Review
Team 3
Smart Hydroponic Greenhouse
December 8, 2016
Advisor: Professor Jackson
Michael D’Anna, Samantha de Groot, Maxwell Joyce and Shaun Palmer 1 1 1

2. Team Members Michael D’Anna Samantha de Groot Maxwell Joyce
Lemon costs $1
Team Members
Michael D’Anna
Samantha de Groot
Maxwell Joyce
Shaun Palmer 2 2 2

3. The Problem Widespread access to local produce Food deserts
Reduce carbon footprint of shipping
For people without the time, space and knowledge to garden 3 3 3

4. Our Solution: Fully Automated Smart Greenhouse
Array of sensors inside greenhouse
Continuous measurements
Displays information on app
Sensor data used for the water pump and nutrient dispersal control 4 4 4

5. Block Diagram 5 5 5

6. Requirements Analysis: Specifications
Automated
Lighting control
Hydroponic watering
Nutrient dispersal
Closed loop system to recycle water
Must fit inside of a studio apartment ~(2’x4’), easily movable
Yield 6 fruiting plants
Reusable
App with simple UI – easy for people to use and learn 6 6 6

7. Requirements Analysis: Inputs and Outputs
Sensor data
Humidity pH
Temperature
Moisture in growing medium
Plant Database
Outputs
Lighting cycle control
Hydroponic pump control
Nutrient dispersal control
pH dispersal control 7 7 7

8. MDR Deliverables – from PDR
Hydroponic mock-up
Functional nutrient dispersal system
At least 1 sensor reading to control unit
Lighting interfaced with control unit
Android Application skeleton 8 8 8

9. MDR Deliverables – Progress
Fully functional hydroponic system and nutrient dispersal system
Two sensors reading to the raspberry pi
Float Sensor
Hygrometer
Interfaced A/D converter
Lighting and pumps interfaced with control unit
Communication with pi over internet, app with menus
Fully assembled greenhouse structure, applied UV film
Potted growing medium mixture 9 9 9

10. Lighting – Progress (Mike)
Designed relay circuit to control outlets with Pi
Installed UV film on Plexiglas
Wrote code to control timing of lights and hydroponic pumps 10 10 10

11. Lighting – Moving Forward
Design custom PCB for voltage regulation
Order by 2/10 to account for lead time
Program control unit to integrate lights into finite state machine design (2/24) 11 11 11

12. Hydroponics – Progress (Shaun)12 12 12

13. Hydroponics – Moving Forward
Program control unit to integrate pumps and nutrient/pH regulation into finite state machine design (2/24)
Fabricate a pH regulation system (1/27)
Same exact concept and circuitry from nutrient dispersal
Plant Seeds (2/27) 13 13 13

14. Sensors – Progress (Sam)
Hygrometer, ADC
pH Sensor
Water Level Float Switch
Temperature and Humidity Sensor 14 14 14

15. Sensors – Moving Forward
Interface pH and temperature/humidity sensors with control unit (2/3)
Use sensor data to control state machine in control unit (2/24)
Exchange sensor data with Max and put it into a format on the application suitable for the user (2/10)
Notifications to fill reservoirs 15 15 15

16. Control Unit – Progress (Team)
Coded a mini routine to:
Turn on and off lights
Turn on and off each pump
Mix a 20ml shot of nutrients with water
Use float sensor to fill nutrient solution with 2 gal of water
Report hygrometer readings on android application 16 16 16

17. Control Unit – Moving Forward
Design state machine to model plant cycle from seed to harvest (1/27)
Code state machine in control unit (2/24)
Ensure code can run stably over a long period of time 17 17 17

18. App – Progress (Max) Established communication with Pi
Capable of sending sensor data to phone
Simple android application laid out with buttons and menus 18 18 18

19. App – Moving Forward Prompt user with questions (1/24)
Use answers to adapt state machine (2/24)
Give user notifications (2/17)
Make website public (after CDR)
Make website into an android web app (12/22) 19 19 19

20. CDR Deliverables Design custom voltage regulator PCB
Finish pH control system
Interface the remaining sensors
Complete functionality of android application
Code entire plant cycle state machine from start to finish
Have plants in the process of growing 20 20 20

21. Demo 21 21 21

22. Questions? 22 22 22

23. Price per lb of Heirloom Tomato
100 days from seed to harvest
Average tomato plant yields 20 lb of tomatoes
Lights are on for an average of 18 hours a day
Results: 3.96 kWH per lb = $0.75 per lb at $0.19 per kWHs 23 23 23