when controlers have the capability to monitor the basic params other than ph I can see a real use for them. at this time if from what I have read over the years is they are nothing more than an elaborate timer, that monitors temp and ph. if I am wrong please correct me on this matter. I know with the technology and software engineers in this world it should be possible. my business for 16+ years focused on digital control systems in schools, hospitals and office buildings . these systems could monitor, humidity, temp, co2 as well as all of the above in the air coming into the space from the a/c unit and the returning air from the space and all of this could be monitored in each classroom etc from a central location (ie main admin building for a school district) and control setpoints changed from this location. Saying all this I know the ability to do more than apex and any other controler is doing at this time just wish the hobby was big enough to make it profitable for a company to do it