Yer screen name is awesome. Highly recommend rolling your own home automation to the PDP11 and writing the control software in FORTRAN-IV (not sure if FORTRAN-77 runs on PDP11...the DEC version was called VAX FORTRAN...probably was back ported to the 11 though, since those were commonly used for interfacing with industrial machinery via GPIB/IEEE488 and relaying back to the VAX via DECnet, XNS/ITP, etc). You could do the same thing, replacing the VAX part with an rPi4 but I wouldn't use TCP.IP or WiFi or Zigbee or any of that garbage modern tech :)