Bash script for connection self-healing (to use on my raspberry pi/beaglebone)

heal_conn.sh

#!/usr/bin/env bash

set -euo pipefail

HEARTBEAT_INTERVAL=3
EXPONENTIAL_BACKOFF_POWER=2
EXPONENTIAL_BACKOFF_MAX_TIMEOUT=60
EXPONENTIAL_BACKOFF_INITIAL_TIMEOUT=1


NETWORK_PROFILE=wlp2s0-nu-office

while true; do
    if ( ping -q -c 1 google.com ); then
        echo "pong"
        sleep $HEARTBEAT_INTERVAL
    else
        echo "oh noes"
        timeout=$EXPONENTIAL_BACKOFF_INITIAL_TIMEOUT
        while true; do
            if ( netctl switch-to $NETWORK_PROFILE); then
                echo "connection restored"
                break
            else
                timeout=$(( timeout * EXPONENTIAL_BACKOFF_POWER ))
                if ( $timeout > $EXPONENTIAL_BACKOFF_MAX_TIMEOUT ); then
                    timeout=$EXPONENTIAL_BACKOFF_MAX_TIMEOUT
                fi
                echo "connection failed. sleeping for $timeout seconds"
                sleep $timeout
            fi
        done
    fi

done