As a uni student not yet into heavy projects yet @DiNozzo97 and I made a mock smart house out of MDF, put controllable rgb LEDs in each room, lockable doors (demonstrated with servos), an openable garage (also servos), and thermistors taking an average temperature of all the rooms with an air con (PC fan). All of which was controllable with a website openable anywhere, run on a Pi. Oh and we integrated a doorbell that linked to twillio that sent you a text, if you replied with a positive response the door would unlock!