Sensor Simulator

Generate multiple MQTT publishes in several topics. In this case i Simulate a DHT 22 for an Arduino ans push the temperature and the humidity to the MQTT Broker.

• JS modules.
• Create a real simulator of every sencor you want.
• Modular to fit different use cases: big IoT applications or even small tests for api or something else.
• Pushes the data in a JSON format and add a timestamp to every measurement.

How It Works

1. This application contains several node packages. In this project are two packages used: mqtt, moment
2. Edit the configurations to the measurements and topics you need. See the part below.
3. The appication generate random values in a specific range. After it will build the topic to be pusblished on.

Usage

JS Applications

It's very easy to use this simulator for every of your projects.

1. Download and run the project:

   $ git clone 'repo'
   $ cd 'repo'
   $ npm install
   $ node simulator.js

Config

Size Limits supports three ways to define config.

1. The genreal MQTT Config

    const connectoptions = {
    cmd: 'connect',
    protocolId: 'MQTT', 
    protocolVersion: 4, 
    clientId: 'Simulator',
    clean: true,
    keepalive: 10, 
    port: 1883,
    will:
        {
            topic: 'your/crazy/Topic/',
            payload: new Buffer('offline'), // Payloads are buffers
        },

2. Build the topic path

   const homeTopic = 'your/crazy/'
   const anlage = 'topic/'
   
   const topicTemp = homeTopic + anlage + 'Temperatur'
   const topicLuft = homeTopic + anlage + 'Luftfeuchtigkeit'

3. The publish:

      client.publish(topicTemp, JSON.stringify(temp, null, 0), { qos: 0, retain: false, dup: false })