*4.3.1.3 Petrol station hardware- temperature and humidity weather*

By adding DHT11 sensor on the petrol station hardware box and connecting it to the ESP-32S microcontroller to represent a second fuel station, that sends temperature and humidity to ThingsBoard server.

**Figure 46.** *Ultrasonic sensor at the top of the primary fuel tank.*

**Figure 47.** *Fuel thermometer inside the primary fuel tank.*
