Quantity   Component name
2 × DHT11 (option 1) Temperature and Humidty Sensor
1 × 20x4 Blue LCD (option 1)
1 × Recycled Humidty Sensor (option 2)
2 × RF TX Module
2 × RF RX Module
1 × LM35 Tempature Sensor (option 1)
1 × Thermosistor (option 2)
2 × MQ135 Sensor Probe
2 × Arduino Nano
1 × Fishing Line
2 × WHITE LED (3mm)
2 × Blue LED (3mm)
2 × TGS2442 CO Sensor (Found in many CO detectors)
1 × Sharp GP2Y1010AU0F Optical Dust Sensor
1 × Push Button