Mosquitto MQTT Server

When Publisher sends a message to a topic,

the Subscriber subscribing to the topic receives the message through the MQTT Broker.

1. mosquitto

Installing mosquitto on Windows

1. Download the windows installation file.

   mosquitto-1.4.15a-install-win32.exe from https://mosquitto.org/download/

2. Click the link and download.

   

   • Win32 OpenSSL v1.0.2o Light

   • pthreadVC2.dll

3. Open " C:\OpenSSL-Win32 ".

   Copy all .dll files and paste on " C:\Program Files (x86)\mosquitto ".

4. Copy the pthreadVC2.dll file that was downloaded earlier on " C:\Program Files (x86)\mosquitto ".

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Run mosquitto subscriber, publisher

• Open two Command Prompt programs.

•   cd /
  
    cd "Program Files (x86)\mosquitto" 
  

• First cmd

  mosquitto_sub -h "host" -t "topic name" -p "port number"

  ex) mosquitto_sub -h 192.168.0.15 -t /home/set -p 1883

• Second cmd

  mosquitto_pub -h "host" -t "topic name" -m "message" -V mqttv311

  ex) mosquitto_pub -h 192.168.0.15 -t /home/set -m "ON" -V mqttv311

• Check communication.

2. python

Installing python module

sudo apt-get install python-pip
sudo pip3 install paho-mqtt

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Run

• Open two terminals.

• First terminal

  python3 sub.py

• Second terminal

  python3 pub.py

• Check communication