MrCOLDguy

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This project demonstrates the capabilities of IoT (Internet of Things), combining microcontrollers with web applications, for practical uses of both front-end and back-end technologies.

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PROJECT OVERVIEW

A complete solution integrating an ESP8266 microcontroller with a Flask-based server.

1. Data Collection:

   • The ESP8266 microcontroller reads temperature and humidity from a DHT22 sensor.

2. Data Transmission:

   • Measurement data is sent in JSON format to the Flask server.

3. Storage & Visualization:

   • The Flask application stores data in SQLite3 and displays it via chart.js (for charts) and DataTables (for sortable and filterable tables).

MOTIVATION

1. Integration Demonstration
   Showcases the entire data flow – from sensor reading, through sending data to the server, to visual presentation.

2. Education & Experimentation
   A practical example of combining hardware (sensor + microcontroller) with software (server, databases, front-end).

3. Scalability Potential
   Thanks to the database configuration (including sensor names), the project can be expanded to handle multiple sensors and users (e.g., in smart home applications).

IMPLEMENTATION

Backend (Python/Flask):

• Python – version 3.11
• Flask – web framework
• Flask-Session – server-side session management
• sqlite3 – database storing measurements and user info
• Additional Python libraries:
  • datetime – date and time operations
  • flash, jsonify, redirect, render_template, request, session – Flask functions for notifications, JSON handling, redirects, templates, requests, and session handling
  • functools (wraps) – decorators
  • werkzeug.security – password hashing and verification

Front-end & Data Visualization:

• HTML, CSS, JS – essential building blocks of the user interface
• Bootstrap – CSS framework for styling and responsiveness
• DataTables – interactive tables with sorting and filtering
• chart.js – charting library
• Jinja2 – template engine (Flask)

Hardware & Microcontroller (C/C++):

• ESP8266 – microcontroller with built-in WiFi support
• DHT22 – temperature and humidity sensor
• DHT.h, ArduinoJson.h, ESP8266WiFi.h, ESP8266HTTPClient.h