Tested on RP3 3B+ - Raspbian OS Lite (Bullseye 32-bit)

Step1). Install build tools and Update pip and setuptools:

• sudo apt-get update
• sudo apt-get upgrade
• sudo apt-get install pip
• python3 -m pip install --upgrade pip
• python3 -m pip install --upgrade setuptools
• sudo apt-get install qt5-qmake
• sudo apt-get install qml-module-qtquick-controls qml-module-qtquick-shapes qml-module-qtquick-controls2
• sudo apt-get install python3-pyqt5.qtquick python3-pyqt5.qtwebkit python3-pyqt5.qtmultimedia
• sudo apt-get install python3-paho-mqtt
• sudo apt-get install python3-opencv

Step2). Enable Mosquitto server

• sudo apt install mosquitto mosquitto-clients
• sudo systemctl enable mosquitto.service
• sudo nano /etc/mosquitto/mosquitto.conf
• 'listener 1883' in mosquitto.conf
• 'allow_anonymous true' in mosquitto.conf
• sudo systemctl restart mosquitto

Step3). Execute GUI on Rpi locally (cannot be deployed using SSH):

• export QT_QPA_EGLFS_HIDECURSOR=1 (hide cursor)
• python3 main.py --platform eglfs

Note1: Enable OpenGL for QML app by going to raspi-config (Enabled by default on Raspberry Pi 4)