Frontend - React library
Backend - Django REST

SQLITE - Django default backend

React - react-moment, react-router-dom, material-ui, recharts, axios
Django REST - rest_framework, django, numpy, gunicorn (for docker hosting)

Frontend is hosted at 3000 and backend at 8000. By default,app shows temperature sensor data in chart and table on component mount

App is capable of posting sensor data as JSON api with readings, sensor type and unix timestamp as input parameters.

User can query sensor data using the query panel by providing the sensor type and date range

Once the query is success( readings are present for the given time range), same will be shown in the Line chart and Table

Authentication and CSRF prevention is handled based on token and is added to request header and verified by django rest session authentication User input sanitation is handled only at a basic level.

Backend can be hosted on docker containers with the help of docker images built via the dockerfile.

  1) Frontend - Query API will work even if "from" and "to" dates are not provided by the user (mentioned in backend code specifying the handling).
                Infinite scrolling/ Line Chart scaling - If query result gives too many data points, displaying them all at once might affect UI/UX experience. This is not taken care currently
                Custom error page shown when visting unknown urls
  2) Backend (Django + DB) - 400 bad request in case of bad paramters or post data not valid
                             SQLite DB - although lightweight and in-memory, not ideal for sensor data posted every second(or milliseconds)