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MQTT Plugin for CraftBeerPi 3.0

This plugins allows to connect to an MQTT Message broker to receive sensor data and invoke actors.

Installation

Install missing python lib

After installation please install python MQTT lib paho

pip install paho-mqtt

https://pypi.python.org/pypi/paho-mqtt/1.1

Install MQTT message broker

Second step is to install an MQTT message broker on your Raspberry Pi. An open source message broker is mosquitto (https://mosquitto.org/)

sudo apt-get update
sudo apt-get install mosquitto

# Furhter commands to control mosquitto service
sudo service mosquitto status
sudo service mosquitto stop
sudo service mosquitto start

The current version don't support username and password log for the mqtt broker

MQTT Test Client

A nice MQTT test client is mqtt.fx http://www.mqttfx.org/

Plugin config

MQTT Sensor

  • Enter the message topic
  • If the data in the payload is in a dictionary, specify the path in "Payload dictionary" with '.' seperators. EG
    • msg = { "Name":"MySensor", "Sensor": {"Value": 32 , "Type" : "1-wire"}
    • "Payload Dict" = Sensor.Value
  • If you data is raw eg (mosquitto_pub -d -t temperture -m 32), leave "Payload Dictionary" Blank
  • Enter prefered unit up to 3 chars