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ENGR 111 Final Project Presentation

Jacob Normand - Mechanical Engineering ‘26

William Bronson - Civil Engineering ‘26

Joseph Katz - Engineering Undecided ‘26

“I pledge my honor that I have abided by the Stevens Honor System.”

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TABLE OF CONTENTS

PRELIMINARY DESIGNS

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PROBLEM STATEMENT

CONSTRAINTS

SELECTED DESIGN

CONCEPT TESTING AND PROTOTYPES

PROCESSING DATA

CONCLUSION

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1

2

4

5

6

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  1. PROBLEM STATEMENT

Create a compact and elegant IoT system that can measure

temperature, humidity, illuminance, CO2, and tVOCs in an indoor space.

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2. CONSTRAINTS

  • should not have any exposed wires outside
  • should include a visual logo or graphic representing Steven's identity
  • must be able to measure the five different physical quantities (temperature, humidity, illuminance, CO2 and tVOCs) at a given time interval
  • based on the measured values of carbon dioxide and tVOC values the system must be able to provide the user with brief information about the indoor air quality (e.g. good, moderate, bad) using LEDs
  • the measured information must be automatically stored and logged on Stevens' MQTT server in real-time according to a given sampling interval

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3. PRELIMINARY DESIGNS

  • Support for stability and security of boards and other inside components
  • Only one opening for the photocell and LEDs
  • More open room for breadboard, WeMos board, and wires
  • Opening for the photocell and each of the LEDs

Design 1

Design 2

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4. SELECTED DESIGN

Dimensions & Shape:

  • 120mm x 100mm x 75mm
  • 5mm shell thickness
  • Rectangular box shape

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Properties:

  • Openings for all sensors to be exposed to the air and light
  • Opening for LEDs
  • Bolt holes for keeping the WeMos board and sensors stable and secure

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Why This Design:

  • More open space for boards and wires inside the enclosure
  • Photocell is more exposed to the light
  • LEDs are more visible on the outside of the enclosure

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4. SELECTED DESIGN

Features:

  • WeMos Board
  • MiCS-VZ-89TE
  • DHT 11
  • Photocell
  • 3 LEDs (RGY)

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5. CONCEPT TESTING AND PROTOTYPES

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Iterative Process:

  • Sensor mounting
  • Integration into total design

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6. PROCESSING DATA

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  • Initially worked
  • Data stopped uploading
  • Data lost
  • Promising preliminary results
  • Continue trying

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7. Conclusion

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Educational journey

  • Growth mindset
  • Challenges are important

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Thank You