2020-06-15

So this contraption that’s been in the making since December 2016 is officially controlling my home AC.  Additionally, it’s logging all of the operational data of the AC: operating state, supply temp, return temp, space temp, space relative humidity as well as attic temperature, outdoor temperature, and outdoor humidity into a real database (PostgreSQL) at one second intervals.

Here’s the complete install.  Yes I know some covers (and screws) are missing.  I’m working on that

I’m not super happy about the wiring duct and component layout, but it is what it is at this point – it’s staying

Here’s the top output off of the BeagleBone Black that’s the ringmaster of this circus.  The LOGIC_CORE process is where the magic happens.  After several days of running we’re at less than 4MB of memory used.  Thank you, modern programming tools  and techniques.