====================== Qt MQTT Setup Ubuntu(Linux) =========================
========================================
Install mosquitto mqtt broker client in host machine -->
sudo apt install gcc mosquitto mosquitto-clients libmosquitto-dev
========================================
Qt :->
1. Clone the MQTT Official Repository and change the branch for the exact Building Kit you’re using in your project (git checkout 5.x.x)
git clone git://code.qt.io/qt/qtmqtt.git
git checkout 5.13.2
2. Check if the version of the repository that you've cloned is the same as the qmake kit that you are using.
cd qtmqtt
git branch -v
/home/xyz/Qt/5.13.2/gcc_64/bin/qmake -v
3. Compiling/Installing MQTT on Linux
cd qtmqtt
open the project qtmqtt.pro in qt
right click on project
select clean
run qmake
in terminal -->
make
sudo make install
--------------------------------------------
-------------------------------------
Start mosquitto broker in host before start publiser/subscriber app by below command -->
$ pkill mosquitto
$ mosquitto -v
-------------- Sample App ----------------------
publisher/subscriber app for test, you will get in cloned git repo
git clone git://code.qt.io/qt/qtmqtt.git
------------------------------------------------------
YouTube Demo :->
https://youtu.be/UiQ4Ju8ZKyY
----------------------------------------------------------------------------------
Ref:
https://mosquitto.org/
https://medium.com/@mateustoin/how-to-use-mqtt-module-on-qt-b9967f0f1c98
https://code.qt.io/cgit/qt/qtmqtt.git/
http://www.steves-internet-guide.com/mqtt-retained-messages-example/
https://assetwolf.com/learn/mqtt-qos-understanding-quality-of-service
https://devopedia.org/images/article/10/4215.1529256993.jpg
https://www.hivemq.com/blog/mqtt-essentials-part-6-mqtt-quality-of-service-levels/
-----------------------------------------------------------------------------------