Here is an abstract of the presentation I made on May 19:
MQTT, The Maker’s Swiss Army Knife
MQTT is used extensively in the Internet of Things to connect devices to each other both locally and across the Internet. I have used MQTT for a number of years for a somewhat different purpose which is to build systems of systems and also to extract data from and inject data into large software applications.
In this presentation I am going to show how I used MQTT to incrementally build a very effective and expandable home automation and monitoring system from legacy and modern components:
• 1990s vintage home alarm system (hacked),
• Mister House lighting control on a Raspberry Pi with X10, Insteon and UPB devices,
• Temperature and heating system current sensors integrated with various ESP8266 boards,
• Local alarm system status monitor using a Wemos Lolin32 board with OLED display,
• Remote system logging and display via io.adafruit.com,
• Temperature monitoring and alarms to mobile devices via Pushover,
• Secure remote login via remot3.it
There is reference information in my project descriptions: Projects
Here are some photos at the event: https://photos.app.goo.gl/C1ttXFVLaAJknr4c2
And here is a PDF copy of the presentation: