Setup:

docker-compose up

make migrateup

cd app

go run main.go

Please also see Lorawan.postman_collection.json

Endpoints:

Test manually

http//:localhost:8080/device?id=xxxxx

Example Payload:

     "deveuis": [
        "4588485",
        "895843",
        "4588ereer485",
        "8958355erer43",
        "4588324485",
        "895843242343",
        "411123245",
        "89522345673",
        "45884877875",
        "895667843",
        "458343285",
        "89583242343"
 ]}

Automatic Test

http//:localhost:8080/test

Write a program that can be run by the technicians on the production line just before assembling the sensor units. They will note the output and feed it into the production system. The technicians can sometimes be impatient and may kill the process if it takes too long. A stretch goal (as a future improvement) is an API that the production system can integrate with directly. 1. Write an application (CLI) that creates a batch of 100 unique DevEUIs and registers them with the LoRaWAN api. 2. (Stretch) Write an API with an HTTP interface that creates the batch and returns it to the client.

Requirements

1. CLI

   a) The application must return every DevEUI that it registers with the LoRaWAN provider (e.g. if the application is killed it must wait for in-flight requests to finish otherwise we would have registered those DevEUIs but would not be using them)

   b) It must handle user interrupts gracefully (SIGINT)

   c) It must register exactly 100 DevEUIs (no more) with the provider (to avoid paying for DevEUIs that we do not use)

   d) It should make multiple requests concurrently (but there must never be more than 10 requests in-flight, to avoid throttling)

2. API

   a) The request must be idempotent. It is possible that the production system could timeout or make multiple requests simultaneously and each request should return then same set of DevEUIs

   b) The response should be a json body with an array of 100 elements {“deveuis”: [“FFA45722AA738240”,....]}

LoRaWAN API The registration operation is an HTTP request to the LoRaWAN provider’s API. The details are below host: europe-west1-machinemax-dev-d524.cloudfunctions.net paths: /sensor-onboarding-sample: post: consumes:

• application/json parameters:
• in: body
• required: true
• type: string
• name: deveui responses: 200: description: The device has been successfully registered 422: description: The devEUI has already been used