Wireguard CLI to MQTT Bash Script - For getting Wireguard information in to Home Assistant MQTT sensors

wg_mqtt_exporter.sh

# A script to pull information from the Wireguard CLI and redirect to a MQTT Broker
# Based on the original script written by valvex - https://community.home-assistant.io/t/send-wireguard-client-info-to-ha-with-mqtt-template-sensor-to-show-active-clients/259532
# Paul Braham 2022
#!/bin/bash

CONF_FILE="/etc/wireguard/wg0.conf"
MQTT_IP="192.168.1.200"
MQTT_USERNAME="mqttuser"
MQTT_PASSWORD="mqttpass"

while IFS= read -r RESULT
do
    IP=$(sudo wg | grep -A 4 $RESULT | grep 'endpoint' | sed s'/endpoint://' | sed -e 's/^[[:space:]]*//')
    LASTSEEN=$(sudo wg | grep -A 4 $RESULT | grep 'latest' | sed s'/latest handshake://' | sed -e 's/^[[:space:]]*//')
    DATA=$(sudo wg | grep -A 4 $RESULT | grep 'transfer' | sed s'/transfer://' | sed -e 's/^[[:space:]]*//')
    PEER_ID_CLEAN=$(echo $RESULT | tr -d '+#/=,')

    FINAL='{"Client":"'"$PEER_ID_CLEAN"'","IP":"'"$IP"'","Last Seen":"'"$LASTSEEN"'","Data":"'"$DATA"'"}'

    mosquitto_pub -h $MQTT_IP -u $MQTT_USERNAME -P $MQTT_PASSWORD -t "wireguard/$PEER_ID_CLEAN" -m "$FINAL" -r
done < <(sudo wg | grep peer: | cut -d" " -f2)