See Rainbow House

This is my 4th iteration of house control. The first 1 was really just manual switches; 2nd using Dallas one wire to a linux box; 3rd a PS2 keyboard (as the demuxer for the various inputs around the house) to a linux box. The 4th version is a dedicated Arduino.

Basic requirements

These are taken from the existing system, including the optional ones.

• Up to 50 inputs - momentary (switches, PIRs etc) or switches
• Up to 50 outputs
  • Low voltage control (relays)
  • 240 volt control (low priority)
• Power up dependencies (super simple)
  • e.g. Turning on TV also requires AV box
  • e.g. Turning on lights requires inverter
  • e.g. Lights power supply off, switches dependent lights off
• Maximum times
  • e.g. Wardrobe light only stays on for 20 minutes
• Group control
  • e.g. An input can turn off all lights
• Set output states
  • Off & On - the obvious ones
  • Swap - the current states
  • Timer - force the default maximum time to something new
• Combined Group & States
  • e.g. Turn off all lights that are currently on in 15 seconds (good night)
• Logging (optional, rolling buffer)
  • Input & Output events
• Network (optional)
  • Read log
  • Individual Output & Group state control (on,off,swap,set time)
  • Change settings (timeouts, which button does what)

Hardware

• Input
  • PS2 Keyboard (104 inputs, and 3 outputs)