wifi-status-mqtt

#!/bin/sh /etc/rc.common

USE_PROCD=1
START=50
STOP=50

start_service() {
  procd_open_instance wifi-sta-to-mqtt
  procd_set_param command /bin/sh $initscript run_service

  # respawn automatically if something died, be careful if you have an alternative process supervisor
  # if process dies sooner than respawn_threshold, it is considered crashed and after 5 retries the service is stopped
  procd_set_param respawn ${respawn_threshold:-3600} ${respawn_timeout:-5} ${respawn_retry:-5}

  procd_set_param limits core="unlimited"  # If you need to set ulimit for your process
  #procd_set_param netdev dev # likewise, except if dev's ifindex changes.
  procd_set_param stdout 1 # forward stdout of the command to logd
  procd_set_param stderr 1 # same for stderr
  procd_close_instance
}

run_service () {
    MQTT_SERVER="192.168.88.2"
    MQTT_ID="OpenWRT-Presence-Event"
    MQTT_TOPIC="haklab/wifi"

    iw event | \
    while read LINE; do
        if echo $LINE | grep -q -E "(new|del) station"; then
            EVENT=`echo $LINE | awk '/(new|del) station/ {print $2}'`
            MAC=`echo $LINE | awk '/(new|del) station/ {print $4}'`
            TOTAL=`iw dev wlan0 station dump| grep ^Station | wc -l`

            #echo "Mac: $MAC did $EVENT"
            mosquitto_pub -h $MQTT_SERVER -i $MQTT_ID -t "$MQTT_TOPIC/mac-${MAC//:/-}/event" -m "$EVENT"
            mosquitto_pub -h $MQTT_SERVER -i $MQTT_ID -t "$MQTT_TOPIC/landevices" -m "$TOTAL"
        fi
    done
}

if [ "$1" == "run_service" ]; then
    run_service
fi