The app relies on an Arduino Uno plugged in to a USB port and reads data periodically from an ambient temperature sensor attached to the Arduino. Backend uses a node app to read the data and ingest it to a mongodb collection, a expressjs app to host an API to provide last n data points, and a reactjs app which renders the data in a simple page.

Follow the instructions from here. Code available in the arduino folder. Once the sketch is uploaded, use the serial monitor (within Arduino IDE) to check if the sensor works.

Uses mongodb as the database. Nodejs app (ingestData.js) reads the data from serial port and pushes it to the database. An API client (server.js), based on expressjs, listens to GET requests on the /readings endpoint and serves last n data points (?limit=n)

Start backend service by navigating to the server directory and running npm start

A reactjs app which fetches data periodically and renders a plotly line chart. Uses tailwindcss for css. Start the development server using yarn start after navigating to the client directory