mqtt_preinstall.sh

#!/bin/bash

echo "Running pre-install script..."

# Update the system
sudo apt update -y

# Install required packages for building MQTT libraries and Mosquitto broker
sudo apt install -y build-essential gcc make cmake cmake-gui cmake-curses-gui libssl-dev doxygen graphviz git libusb-1.0-0-dev libsystemd0 libsystemd-dev mosquitto python3 python3-pip

# Clone and install Paho C library version 1.4
git clone https://github.com/eclipse/paho.mqtt.c.git
cd paho.mqtt.c
git checkout v1.4  # use "v1.4" tag instead of "1.4"
cmake -Bbuild -H. -DPAHO_ENABLE_TESTING=OFF -DPAHO_BUILD_STATIC=ON -DPAHO_WITH_SSL=ON -DPAHO_HIGH_PERFORMANCE=ON
sudo cmake --build build/ --target install
sudo ldconfig  # update dynamic link library list
cd ..

# Clone and install Paho C++ library
git clone https://github.com/eclipse/paho.mqtt.cpp.git
cd paho.mqtt.cpp
cmake -Bbuild -H. -DPAHO_BUILD_STATIC=ON -DPAHO_BUILD_DOCUMENTATION=TRUE -DPAHO_BUILD_SAMPLES=TRUE
sudo cmake --build build/ --target install
sudo ldconfig  # update dynamic link library list
cd ..

# Configure Mosquitto MQTT broker to allow remote and anonymous connections
echo -e "\nlistener 1883 0.0.0.0" | sudo tee -a /etc/mosquitto/mosquitto.conf
echo "allow_anonymous true" | sudo tee -a /etc/mosquitto/mosquitto.conf

# Restart the Mosquitto MQTT broker for the configuration changes to take effect
sudo systemctl restart mosquitto

# Install Paho MQTT client for Python 3
sudo pip install paho-mqtt

# Success message
echo "MQTT libraries and Mosquitto broker installed successfully."