thanospan / exm-playground

Backend Assignment

A small - and hopefully - fun exercise

Scenario

We want to simulate a hardware device (client) that provisions itself and sends weather data to an IoT platform. In order to hide the internals of this platform and provide a friendlier API we introduce an intermediate HTTP server (backend) with the following basic capabilities:

• Create/delete a device
• Upload/download telemetry data

flowchart LR
    P(Platform) <-->|HTTPS| B(Backend) <--> |HTTP| C(Client)

Assignment

Fork this Github repository, proceed with the development and ping us when you're ready! Happy coding :)

You are provided with:

• Repository with detailed explanation of the test and a dataset in CSV format
• Thingsboard server url
• Tenant admin credentials

You need to deliver:

1. Backend application

A node express app with REST endpoints that will interact with a Thinsgboard server and respond appropriately to client:

• Endpoint for device creation
• Endpoint for device deletion
• Endpoint for uploading telemetry
• Endpoint for downloading telemetry: returns the aggregated (SUM per hour) telemetry data from a specific device

2. Client application

A node app that makes use of the backend API that you created by:

• creating a new device
• uploading data from the CSV file (data.csv) as telemetry to that device (use as many requests as you deem fit)

Requirements

• All interactions between backend and the platform should be done via the HTTP API
• Both apps should be containerized and wrapped in docker-compose script for easy deployment
• All code should be available in the repository