node-async-device's Introduction

Nodejs App to emulate a IoT device

The main purpose of this project is to emulate asynchronous communication of a IoT device to driver.

Development time taken project

30 minutes for brainstorming
1.5 hours for Developement

Pre-reqs

To build and run this app locally you will need a few things:

Install Node.js
Install VS Code
MQTT Broker Mosquitto

Getting started

Clone the repository

git clone --depth=1 https://github.com/JOELJOSEPHCHALAKUDY/node-async-device.git

Install dependencies

cd <project_name>
npm install

Configure your env file

# create a .env file in the root folder and copy the content below
 intMQUsername=''

 intMQPassword=''

 intMQClientId=''

 intMQHost='mqtt://test.mosquitto.org'

 intMQPort=1883

Run the project

nodemon

npm start

Device response to request from driver

Device is online : Sat Jul 17 2021 14:07:06 GMT+0530 (India Standard Time)
Listening...
Received request from driver as ASCII:   123 34 112 97 114 97 109 95 110 97 109 101 34 58 34 116 101 109 112 101 114 97 116 117 114 101 34 44 34 114 101 113 117 101 115 116 95 116 121 112 101 34 58 34 99 111 109 109 97 110 100 34 125
Received request from driver as string:  {"param_name":"temperature","request_type":"command"}
Received : { param_name: 'temperature', request_type: 'command' }
param_name temperature
Initating a 3 second delay to emulate slow network...
Sending resonse to driver...

Note! Make sure you have already have installed nodemon as global dependency or dev dependency npm install -g nodemon othewise you may encounter following error:- nodemon is not recognized as internal or external command, operable program or batch file

Finally,