Quantity   Component name
1 × Raspberry Pi 3 B+ was used, but 4 would work too
1 × Switches integrated into doors from old alarm system Could be replaced with any sensor that breaks upon a door opening
1 × BME680 Temp, pressure, humidity sensor
1 × Raspberry Pi UPS HAT
2 × COM-13015 Relay
1 × MQ2 Smoke Sensor
1 × Arduino
1 × Level Converter for Pi and Arduino to be able to communicate