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CO2 Monitoring System - Coggle Diagram
CO2 Monitoring System
Explore Phase
Audience
Stakeholders
IT Admin
Access to the backend
Education Department
Dancing Coach
Ms Bella Meyer
Would like data avaliable on the big screens after school
Teachers
Mr Steve Peterson
Wants to get alerts out to his student quickly if required.
Likes to have the best teaching and learning conditions in his classroom
Would like to act when needed to improve learning outcome for his students
Accesses classroom observations to his office laptop and on his mobile device
Dr Cira Arhus
Would like to download data
Access data from air quality app and government websites.
data for her students to use.
School Leadership
Mrs Cara Kling
Works in an office and would like to be aware of CO2 Levels
Would like an alert when CO2 crosses a threshold
Often gets headaches due to high CO2 levels
Mrs Daisy Oberman
Would like CO2 monitoring everywhere
Monitor CO2 on an app
Receive message alerts on her phone
Students
Florian Muller
Suffers from allegies and would like to be notified
Isn't allowed a mobile device and would like to see CO2 inside the classroom
Users
Technology
Hardware
Microcontroller
Raspberry Pi
NodeMCU ESP8266
Sensors
DHT22 Temperature and Humidity Sensor
SCD 30 CO2 Sensor
Wiring
Resistors
220 OHM Resistor
Resistor 4K7 ohms
Micro USB cable
Breadboard Cables
Battery Pack
OLED
Red LED
Breadboard
Software
Python
SQL
API
HTML
Data
Internally generated data
Temperature
Humidity
CO2 Levels
External Data
DBMS
Requirements
Useability Principles
Learnability and effectiveness
Safety
Responsiveness
Quick and simple to use
Utility
Portability
Easy for students to hold
Accessability
Reliability
refined solution with no bugs
UI Interface
Global Web Content Accessibility Guidelines
https://www.w3.org/TR/WCAG21/
St Peters Style Guide
CARP Principles
Impacts
Social
Alert Students and Teachers of Extreme levels of CO2
Economic
May Cost a lot to start up
Extended costs to run the modules
Personal
Will Help students to concentrate better and study and learn
CO2 monitoring system.
Using sensors in the classroom to monitor CO2 levels.
Last year was the first time it was starting to be implemented.
Impact of CO2 levels on learning
Developing Phase
IPO Chart
Dataflow Diagrams
Testing
OLED
SCD30
LED
Generating Phase
Initially data could be displayed via serial monitor and OLED however couldn't access the website.
Code was modified as after testing of each of the individual components the most likely source of error was in the code establishing connection between the webpage and device.