Pytt

MQTT Client in Python - OpenHAB

Dependencies

• Python3
• pip
• Paho-MQTT
• VirtualENV

Installation

To make it simple, we work in a virtual machine.

OpenHAB

Openhab will ack as the MQTT server and will display all the data he received from the MQTT client.

For more information on How To Install OpenHAB, please refer to the doc

Configuration

• Config file {INSTALLATION_FOLDER}/configuration/openhab.cfg :

  • Persistance :

mqtt-persistence:broker=openhab

• MQTT Transport :

mqtt:openhab.url=tcp://localhost:1883

• Item {INSTALLATION_FOLDER}/configuration/item/demo.item:

You can change the topics for what you want (ex: paho/temparature)

Number mqttsw1 "temp [%.1f °C]" {mqtt="<[openhab:paho/temperature:state:default]"}

• Sitemap {INSTALLATION_FOLDER}/configuration/sitemap/demo.sitemap:

sitemap demo label="Main Menu"
{
        Frame label="MQTT" {
                Text item=mqttsw1
        }
}

Mosquitto

During the installation of openhab, you will be ask to install.

In the config file /etc/mosquitto/mosquitto.conf you need to add this line :

allow_anonymous = true

Command that may help you to diagnotic issue with MQTT :

Subscribe to topics : mosquitto_sub -d -t paho/temperature

Send Msg to topics : mosquitto_pub -d -t paho/temperature -m "18"

Client

Clone the branch :

git clone https://github.com/gzsierra/pytt/

Pip

For installation, please see the doc

Paho-MQTT

For installation, please see the doc

VirtualENV (optional)

For installation, please see the doc

Usage

Entry file format must be : [TIME] [VALUE] ex: timeX 18

To execute the script : python pytt.py test.txt

LICENCE

MIT