MQTT with Qt example.
# sudo apt update
# sudo apt install git nano vim neovim cmake cmake-curses-gui ninja-build g++ gdb qt5-default qtconnectivity5-dev qtbase5-private-dev
# git clone --branch v5.11.3 https://github.com/qt/qtmqtt.git
# cd qtmqtt
# qmake
# make -j 4
# sudo make install
# git clone https://github.com/HEI-SYND-226-SDi/qt-hellomqtt.git
# mkdir Release
# cd Release
# cmake -G Ninja -DCMAKE_BUILD_TYPE=Release ..
# ninja
# ./HelloMQTT