Money invested:
- RaspberryPi and RPI case ----> 50€
- MicroSD ----> 13€
- Arduino Nano X5 ----> 15€
- Protoboard ----> 5€
- NRF24 ----> 3.50€
- DHT22 ----> 10€
- STM-32 ----> 2.82€
- MQ-135 ----> 4.55€
- BMP180 ----> 3.50€
- Magnetic Door Switch Sensor ----> 4€
- LM393 ----> 1.50€
- HC-SR501 ----> 6.50€
- USB AM/BM Wire ----> 30€
- Mini USB Wire ----> 10€
- Jumpers wires ----> 15€
- Relay board ----> 3.75€
Total = 178,12€ x 2 = 356,24€