unraid-mqtt-pub-sub

Unraid Plugin to add the ability to publish to a mqtt broker or subscribe to a topic.

Installation

Plugins > Install Plugin (or it can be installed from the Community Apps plugin)

https://raw.githubusercontent.com/giganode/unraid-mqtt-pub-sub/master/mqtt-pub-sub.plg

Usage

Preparation

Enter your mqtt credentials under Settings Page.

Settings --> MQTT

Publishing

Old template:

#!/bin/bash

source /boot/config/mqttcredentials

if [[ -z "$MQTT_HOST" || -z "$MQTT_PORT" || -z "$MQTT_USER" || -z "$MQTT_PASSWORD" || -z "$MQTT_CLIENT_ID" ]]; then
  echo "Error: Information missing."
  exit 1
fi

mosquitto_pub -h $MQTT_HOST -p $MQTT_PORT -i $MQTT_CLIENT_ID -u $MQTT_USER -P $MQTT_PASSWORD -t "$MQTT_CLIENT_ID/sensor/voltage" -m "{\"voltage\": $value}"

New template with shortened command line for publishing:

#!/bin/bash

source /boot/config/mqttcredentials

if [[ -z "$MQTT_HOST" || -z "$MQTT_PORT" || -z "$MQTT_USER" || -z "$MQTT_PASSWORD" || -z "$MQTT_CLIENT_ID" ]]; then
  echo "Error: Information missing."
  exit 1
fi

MQTT_URL=mqtt://$MQTT_USER:$MQTT_PASSWORD@$MQTT_HOST:$MQTT_PORT/$MQTT_CLIENT_ID

mosquitto_pub -L "$MQTT_URL/sensor/voltage" -m "{\"voltage\": $voltage}"

Subscribing

Start with this template:

#!/bin/bash

source /boot/config/mqttcredentials

if [[ -z "$MQTT_HOST" || -z "$MQTT_PORT" || -z "$MQTT_USER" || -z "$MQTT_PASSWORD" || -z "$MQTT_CLIENT_ID" ]]; then
  echo "Fehler: MQTT-Anmeldeinformationen sind unvollständig."
  exit 1
fi

mosquitto_sub -h $MQTT_HOST -p $MQTT_PORT -u $MQTT_USER -P $MQTT_PASSWORD -t "$MQTT_CLIENT_ID/sensor/voltage"

Information

In this plugin, bc is included. It's useful when you need to do float calculations in your bash script.