Google weather data compare with DHT11 Sensor data

Google Weather Data compare with DHT11 Data

Google weather data compare with DHT11 Sensor data [ figure 1]

Introduction

Basically this is an experiment between Google weather temperature and humidity vs arduino controlled DHT11 sensor temperature and humidity data.

At last we check the both data and conclude the accuracy of both atmospheric devices.

Google weather data compare with DHT11 Sensor data [figure 2]

Google Weather

Google weather is a platform which is developed by Google. Google take the weather information like temperature and humidity etc.

From some verified source or website and reflects the data on Google weather and on the basis of that data Google predict related data such as possible rain, dryness etc.

And show on Google weather Google own created interface. Some user opinion the Google weather data some time not accurate and some time it is accurate.

Experiment

We take data from same time same day from Google weather and Arduino controlled DHT11 sensor after completeing project.

Device Information

DHT11 sensor is a device which can measure the weather temperature and humidity. It can work with any microcontroller such as arduino Uno/arduino mega/arduino nano/raspberry pi etc. DHT 11 manufacturer claims that it accuracy almost 95% with tolerance 1± % .we check separately DHT11sensor temperature vs temperature metre the reading difference between both device is 8%. Understanding with an example when DHT11 sensor read 30*C then temperature metre read 32.5*C. Next check the DHT11 sensor read humidity 69 and the Humidity sensor read 75. This analysis states that the DHT 11 sensor is not very efficient for measuring temperature and humidity. Let’s check what is the tolerance level between Google weather and DHT11 temperature?

Arduino setup

The DHT11 sensor has pins Vcc, GND,A0. We use it as a microcontroller Arduino uno. We connect the Vcc pin of sensor with 5v arduino pin and ground of sensor connected with Arduino ground. A0 pin of sensor connect with digital pin 2 of Arduino. Now USB cable connects with arduino and PC. Let’s upload the code. The code image is below  Arduino software version.

Experimental data

Both readings are taken at 2.32 PM or 14.32 PM in the same location. At first temperature readings, when Google weather temperature show 39*C then sensor show 33*C. Almost 6*C difference.

In the temperature difference is too much inappropriate. When Google weather humidity show 33% then the sensor show 48% humidity difference between two medium of humidity data is 15%. This difference is huge and in appropriate.

Specially temperature data from both medium states that temperature of that particular time is above 30*C And the weather is SUNNY And humidity also states that NO POSSIBLE RAIN.

After the seeing result of experiment states that both data is also much difference but the true part of The data is both data indicating the same condition of the environment.

This experiment is limited by a limited number of process so In this case  it is not possible to give a separate judgement.

Google weather data compare with DHT11 Sensor data [figure 3]

Conclusion

Weather is a natural phenomenon that cannot be predicted in any way, yet we may be using some devices that allow us to be aware of any natural disaster and these device can shoot those predictions.

Google weather data compare with DHT11 Sensor data [figure 4]

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