In the engineering and facility management space there are drawing symbols and standards to show facility connections - HVAC/Temp/Pressure. Generally called Instrumentation and Control Systems or P&ID. Cant find a template for this.
I’m willing to try and build a template, if I can get some background on how. Can you post templates and get revenue from people who use them?
Also IoT - and Amazon AWS-IoT, Microsoft Azure-IoT