A very simple Flask web server + HTML frontend

Facilitates temporary data storage and 2-way communication between two RPI units.

demo.mp4

Background

For a design course's project, we built two functional prototypes of our proposed product to serve as a proof-of-concept.

Each prototype includes a Raspberry Pi running this web server, which enables both prototypes to communicate via calling each other's API endpoints.

The frontend was used for prototype showcase/presentation purposes and provides a visual representation of the data that is being stored on one prototype's web server and retrieved by the other prototype unit.

Documentation

Global variables

Used for temporary storage of data within the web server.

Name	Type	Description
speed	Float	Represents a user's speed in km/h.
time	Datetime	Represents a specific time.

REST APIs

Endpoint	Method	Description	Parameter(s)	Returned value(s)
/speed	GET	Returns speed in String type	NIL	String speed
/updatespeed	POST	Updates speed with the value within the request header. Returns a Response object for redirecting to the home page.	Request header: {'speed': Integer}	Response redirect()
/time	GET	Returns time, formatted to HHMM and in String type	NIL	String time
/decreasetime	POST	Rolls back time by 1 hour. Returns a Response object for redirecting to the home page.	NIL	Response redirect()
/increasetime	POST	Advances time by 1 hour. Returns a Response object for redirecting to the home page.	NIL	Response redirect()
/decreasespeed	POST	Decreases speed by 3. Returns a Response object for redirecting to the home page.	NIL	Response redirect()
/increasespeed	POST	Increases speed by 3. Returns a Response object for redirecting to the home page.	NIL	Response redirect()