ASSIGNMENT 5

Measuring Heat Index of a Room

NodeMCU is a low-cost open source IoT platform.It initially included firmware which runs on the ESP8266 Wi-Fi SoC from Espressif Systems, and hardware which was based on the ESP-12 module.Later, support for the ESP32 32-bit MCU was added.

The DHT11 is a basic, ultra low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin

The heat index (HI) is an index that combines air temperature and relative humidity, in shaded areas, to posit a human-perceived equivalent temperature, as how hot it would feel if the humidity were some other value in the shade. The result is also known as the "felt air temperature", "apparent temperature", "real feel" or "feels like".

   Components Used

• Arduino Board
• Laptop
• NodeMCU
• DHT Sensor
• 16x2 LCD
• Breadboard

Arduino Code

Calculations

Given Image shows the formula for the heat index calculation.

Heat Index, Temperature, Humidity Graph

The screenshot shows the trend of Temperature, Humidity and Heat Index wrt time.The average Heat Index value is 53.67