Implementation of DHT11 Sensor with Arduino Project

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Added on  2023/01/18

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Project
AI Summary
This project focuses on designing and implementing a temperature and humidity measurement system using a DHT11 sensor and an Arduino microcontroller. The project involves selecting appropriate sensors, designing a circuit, prototyping the circuit on a breadboard, and writing the necessary Arduino code to read and display the sensor data on an LCD digital display. The DHT11 sensor, chosen for its compatibility with Arduino and acceptable accuracy, measures temperature and humidity levels, with the LED indicating voltage frequency. The project addresses the challenges of sensor selection, circuit design, and code compilation. The project aims to measure the temperature and humidity level with a (+) or (–) accuracy of 2ºC and 5% respectively. The project also highlights the importance of understanding sensor characteristics and Arduino programming for effective implementation. The output result is indicated by an LCD digital display after a successful compile of the Arduino code. This project can be implemented in industries where the temperature and humidity have to be verified mainly for safety precautions.
Document Page
Project overview.
The temperature and humidity have to determined and verified for safety
precautions.Temperature and humidity are measured by the use of DHL11 sensors which have to
be compatible with Arduino power input and have an accuracy of +2˚ or -5%.After a successful
coordination with the Arduino code,the LCD digital display shows the result and the LED
indicates the frequency of voltage across the digital display.
Statement of the problem
Measuring of temperature and humidity poses a greater challenge mainly when it comes to the
choice of sensors.The researcher is expected to have a wider knowledge of the sensors,actuators
and their characteristics and usages.A number of factors have to be considered when selecting
the DHL 11 such as cost,popularity,thermistor used and the capability of the Arduino output
voltage.
Methodology
The project was executed in stages i.e. choosing the appropriate sensor, drawing of the circuit
diagram, prototyping the circuit on a breadboard and finally compiling the code. Soldering and
execution of the circuit.
Challenges
The digital display at times showed a set of functions
Short circuiting caused by soldering drops
Unsuccessful compilation of Arduino due to wrong pin configuration on DHL11
Sensor selection
There are a variety of sensors such as;thermal thermistor,diital temperature,moisture sensors
e.t.c.The sensor had to be compatible,non-progammable and able to gain easy results after a
correct Arduino programme. Should also provide an allowable temperature range (0-50˚C) and
minimum error ±2˚.Hence the DHT11 was chosen.
References
[1] A. K, Institute of Electrical and Electronics Engineers, New York.: ISBN 978-1559373333, 1994.
[2] H. a. J. J. Fraser, Standby Electric Generators for Emergency Farm Use, 1999.
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