Bash auto mqtt pub script with cofigurable broker, msg and topic

auto_mqtt_pub.sh

#!/bin/bash

read -p "[!] Enter Broker IP or URL (f.e. broker.hivemq.com): " broker

echo "[!] Testing broker $broker connection with ping . . . "
echo "[!] Please wait . . ."

brokeron=$(ping -c 4 $broker)

if [ $? -gt 0 ]; then
	echo "[-] Broker $broker cant respond to ping, try another broker"
	echo "[-] Exiting with error 123."
	exit 123
fi

echo "[!] Broker $broker ping responded!"
read -p "[!] Enter topic (f.e. test): " topic
read -p "[!] Enter message to send (f.e. helloworld): " msg

echo "[!] Sending mqtt packets to $broker with topic $topic and message $msg (ctrl + c to stop)"
while true; do
	echo ""
	msgans=$(mosquitto_pub -h $broker -t $topic -m $msg)
	stnderror=$?
	echo $msgans
	if [ $stnderror -eq 7 ]; then
		echo "[-] MQTT Msg to broker $broker respond with error 7: Connection Lost." 
		echo "[-] Exiting with error 7."
		exit 5
	fi
	echo "[+] Message $msg correctly sent to broker $broker with topic $topic."
	sleep 5
done