This is a program which receives a CO2 level from a sensor, together with a    temperature reading associated with that sensor.  It also collects the current    outside temperature, and 119 hourly temperature predictions (5 days) into the   future.       With these data, the algorithm decides whether to "open the window" of the room   associated with the sensors.  By "open the window" we mean activate a vent fan   which blows in exterior air.