The Jimmerness - Adventures in Home Automation

I'm going to start listing software versions - sometimes I hit a wall, because of dated information. Home Assistant evolves continually...a year from now, this might have a different solution. Components and their versions: Home Assistant Core 2021.1.0 (HA) Operating System 5.9 (HA) Node Red 7.2.11 (HA) Mosquitto Broker 5.1 (HA) Octoprint 1.5.2 MQTT 0.8.7 (Octoprint plugin) MQTT-Subscribe 0.1.6 (Octoprint plugin) MQTT Explorer 0.3.5 (Linux, optional)  My goal is to create buttons in a Lovelace dashboard, to trigger actions for my two 3D printers. Actions like "connect/disconnect" to start a connection between Octoprint and the printer, "preheat nozzle" so I can have the nozzle go to 180 degrees Celsius to change filament, "Extrude" to extrude 10mm of filament, or "Retract" to retract 10mm of filament, and maybe a "heat bed" so I can heat up the bed to remove a print. I'll start with a "Connect" button for my Lulzbot ...

  I'm going to start listing versions - sometimes I hit a wall, because of dated information. Home Assistant evolves continually...a year from now, this might have a different solution. Components and their versions: Home Assistant Core 2021.1.0 (HA) Operating System 5.9 (HA) Node Red 7.2.11 (HA) Mosquitto Broker 5.1 (HA - this is the MQTT Broker) Octoprint 1.5.2 MQTT 0.8.7 (Octoprint plugin) MQTT-Subscribe 0.1.6 (Octoprintg plugin) MQTT Explorer 0.3.5 (Linux, optional)  My goal is to create buttons in a Lovelace dashboard, to trigger actions for my two 3D printers. Actions like "connect/disconnect" to start a connection between Octoprint and the printer, "preheat nozzle" so I can have the nozzle go to 180 degrees Celsius to change filament, "Extrude" to extrude 10mm of filament, or "Retract" to retract 10mm of filament, and maybe a "heat bed" so I can heat up the bed to remove a print. I'm running Home Assistant on a...