Introduction

Web server using a Raspberry Pi and DHT22 sensor to graph the humidity and temperature in my apartment over time. The data can be accessed over a web browser.

Skills I learned during this project:

• Setup the minimal Raspbian operating system to the RPi, called Minibian
• Install and use Python, and the Python virtual environment
• Install and use Flask, a Python-based web micro-framework
• Install and use uWSGI as the application server for Flask
• Install and use Nginx light-weight web server
• Use Skeleton to make the web UI look better
• Use the RPi GPIOs as digital input and outputs
• Use a DHT22 humidity and temperature sensor
• Install and use the SQLite database to store sensor data
• Add a cron job to store sensor data every so many minutes
• Use the Google Chart API to create visual representations of the sensor data
• Use Javascript/JQuery to add interactivity to web pages
• Use Plotly for graphical analysis of sensor data

YouTube

YouTube:

Circuit Diagram