Configure MQTT for use with Buildroot and RPI4 client / server communication

[abbottwhitley]

Review and work through previous course content for Buildroot:

• MQTT Python Example

DoD: Transfer data between two seperate RPIs using MQTT protocol

[abbottwhitley]

Instructions detailed at course WIKI ~~> ( MQTT Python Example ) covers Python2.7 install and example code.

Steps for Python3:

• Buildroot Setup
  • Target packages > Interpreter languages and scripting > Python3
  • Target packages > Interpreter languages and scripting > Python3 > External modules > python-paho-mqtt
  • Target packages > Networking Applications > mosquitto
• The publish and subscribe script found here can be used to create a quick test script to test the client/server communication
• Both scripts need to be added to a directory within the rootfs_overlay
• Run each script from RPI using the following commands (must be in directory where script is located)
  • python Server.py
  • python Client.py

[abbottwhitley]

Successfully installed and tested Python3 client/server setup using the publish/subscribe scripts found at How to use MQTT in Python (Paho)