mqtt_set_up.sh

#!/bin/bash

# ============================================================================== #
# ----------------------------- MQTT Set Up Script ----------------------------- #
#  ________________________________ CONSTANTS _________________________________  #
DESIRED_PORT=18300                                                               #
CONFIG_FILE="./mqtt.conf"                                                        #
#  ____________________________ PACKAGE MANAGEMENT ____________________________  #
if ! dpkg -l | grep -q mosquitto; then                                           #
    sudo apt-get update                                                          #
    sudo apt-get install -y mosquitto mosquitto-clients                          #
fi                                                                               #
#  ____________________________ CONFIGURATION FILE ____________________________  #
if [ ! -f "$CONFIG_FILE" ]; then                                                 #
    echo "allow_anonymous true
listener $DESIRED_PORT 0.0.0.0
protocol mqtt" > "$CONFIG_FILE"                                                  #
else                                                                             #
    echo "Configuration file already exists. Skipping creation."                 #
fi                                                                               #
# ____________________________ SERVICE MANAGEMENT _____________________________  #
mosquitto -c "$CONFIG_FILE" -d                                                   #
# ============================================================================== #