EMAM2MQTT

A project that generates MQTT-Adapter for EmbeddedMontiArcMath components.

Warning

This generator is part of an composite generator and does not create an executable. Look at EMAM2Middleware if you want to generate one.

Getting Started

These instructions will get this project installed on your Ubuntu system

Installing project

Download this project to your computer

Download and install Java JDK (alternatively via apt install openjdk-8-jdk)

Download and install Maven (alternatively via apt install maven)

Download and install Ecplise IDE

Import the project as "Maven Project" in Eclipse

Open terminal and switch to the root of your project directory

In terminal run

mvn clean install -s settings.xml

Installing MQTT broker (locally on Ubuntu)

Open terminal

Add new MQTT repository

apt-add-repository ppa:mosquitto-dev/mosquitto-ppa

Run update

apt-get update

Install mosquitto and mosquitto-clients

apt install mosquitto

apt install mosquitto-clients

Start the Mosquitto Brocker

/etc/init.d/mosquitto start

Installing MQTT broker (locally on Windows)

Download and install Mosquitto

Restart your computer

Mosquitto is now available and can be accessed via command line using mosquitto -h

Installing MQTT libraries (locally on Ubuntu)

Open terminal and run

apt install build-essential gcc make cmake git

Installing PahoMQTT C library

run

git clone https://github.com/eclipse/paho.mqtt.c
cd paho.mqtt.c
cmake -Bbuild -H. -DPAHO_WITH_SSL=OFF
sudo cmake --build build/ --target install

Installing PahoMQTT C++ library

after installation of C library run

git clone https://github.com/eclipse/paho.mqtt.cpp
cd paho.mqtt.cpp
cmake -Bbuild -H. -DPAHO_WITH_SSL=OFF
sudo cmake --build build/ --target install

Documentation of the PahoMqtt C++ library

Set environment variables for MQTT (optional)

additionaly, you can set the environment variables for MQTT libs and includes directory by modifying the environment file on your system

sudo nano /etc/environment

in the file, add a new line and write

MQTT_LIBS = "PATH/to/libs"
MQTT_INCLUDE_DIR = "PATH/to/includes"

Installing MQTT Publisher/Subscriber demo (locally on Ubuntu)

open terminal, switch to mqtt_demo directroy inside the project and run cmake .

compile the demo by running make

run the demo afterwards with ./mqtt_demo

additionaly, you can also use mosquitto_pub and mosquitto_sub commands from mosquitto broker to subscribe/publish messages

for example: subscribe to topic /hello with mosquitto_sub -t /hello and publish a message to this topic with mosquitto_pub -t /hello -m "hi, how are you?"

Tagging for Mqtt

Mqtt only needs an Topic to publish or subscribe to { topic = {topic} }

For example {topic = /echo} for topic "/echo"

Here an Example for a Mqtt Tagging File