David-Lor

#!/bin/bash

# This script subscribes to a MQTT topic using mosquitto_sub.
# On each message received, you can execute whatever you want.

while true  # Keep an infinite loop to reconnect when connection lost/broker unavailable
do
    mosquitto_sub -h "127.0.0.1" -t "test" | while read -r payload
    do
        # Here is the callback to execute whenever you receive a message:

itayd

#!/bin/bash

require() {
    for what in $*; do
        if !(which $what >& /dev/null); then
            echo "error: $what is required to run this script, please install it"
            exit 1
        fi
    done
}