Assignment 5.B

Heat Index Experiment

 

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". For example, when the temperature is 32 °C (90 °F) with 70% relative humidity, the heat index is 41 °C (106 °F).

 

Circuit

 

Screenshots


  • Components Used

    1. NodeMCU Board

    2. DHT11 sensor

    3. Laptop/Mobile to monitor

    4. Active Internet over WIFI

  • Thingspeak Channel

    The following Screenshot represent the channel and fields created to monitor data acquired from DHT11 over particular time period

    Data.csv

     

  • Calculation

    The following formula is used to calculate heat index of my room.

     

  • Code

    The following Screenshot represent the code written for the following assignment. to download the code in txt format click the link below.

    Code

     

  • Results

    The following Screenshot represent the graph of final results. The heat index comes out to be in range of 27-41. the high value may be result of high humidity in my area which makes my room slightly thermally unstable The two dips in temperature may be due to Air condiotiner.