The Importance of Accuracy in Temperature Measurement

Oct 13, 2025 by wbrum.org 25 views

Introduction

The use of Arduino's scenario in controlling kitchen temperatures is now increasingly popular, thanks to its ease and accuracy. In this project, we will use the DHT11 sensor to measure the temperature and humidity in the kitchen. This sensor will provide input data to Arduino Uno, which will then be displayed on the 16x2 LCD screen. With this ability, users can monitor temperatures automatically and respond to temperature changes by activating fans or AC as needed.

Background of Arduino Uno

Arduino Uno is a microcontroller board based on ATmega328, has 14 digital input/output pins, where 6 of them can function as PWM output. Arduino is equipped with a 16 MHz ceramic resonator, USB port, and ICPS header, making it an ideal choice for various electronic applications. With the rapid development of technology, these tools are increasingly sophisticated and provide efficient solutions in everyday life.

DHT11 Sensor: A Simple but Effective Device

DHT11 sensor is a simple but effective device for measuring temperature and humidity. In this project, this sensor plays an important role as an input that collects temperature data. One of the advantages of using DHT11 is its ability to provide fast and accurate reading. However, it is essential to remember that this sensor has a limit in terms of temperature and humidity range. Data obtained from DHT11 is then displayed on the 16X2 LCD screen, providing clear and easy-to-read information.

The Importance of Accuracy in Temperature Measurement

The accuracy of temperature measurement is also the main focus in controlling automatic temperatures. If the temperature measurement is done manually, the results tend to be inaccurate and can cause errors in temperature regulation. With an automatic system, the use of tools such as thermometers as a comparison of data can provide additional accuracy. If the temperature measured by the DHT11 sensor reaches a certain limit, Arduino will activate the fan to cool the kitchen temperature.

The Benefits of Automatic Temperature Control

The integration of this system allows users to control temperatures in a more efficient way. The use of DHT11 and 16x2 LCD sensors in this project provides a clear picture of the temperature and humidity conditions in the kitchen. With this automatic setting, users not only get comfort but also better energy efficiency because the device will only operate as needed.

Conclusion

By developing this project, we can see how technology can be applied to improve the quality of daily life. Automatic temperature control is not only about comfort but also about energy management and efficiency. With the increasing number of innovations in the field of electronics, we can create a more intelligent and responsive system in meeting the needs of our environment.

Project Components

Arduino Uno
DHT11 sensor
16x2 LCD screen
Fan
Power supply
Jumper wires

Project Setup

Connect the DHT11 sensor to the Arduino Uno.
Connect the 16x2 LCD screen to the Arduino Uno.
Connect the fan to the Arduino Uno.
Connect the power supply to the Arduino Uno.
Connect the jumper wires to the Arduino Uno.

Project Code

#include <DHT.h>
#include <LiquidCrystal.h>

const int dhtPin = 2;
const int lcdPin = 3;
const int fanPin = 4;

DHT dht(dhtPin, DHT11);
LiquidCrystal lcd(lcdPin, 12, 11, 5, 4, 3, 2);

void setup() {
  Serial.begin(9600);
  lcd.begin(16, 2);
  dht.begin();
  pinMode(fanPin, OUTPUT);
}

void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();
  lcd.setCursor(0, 0);
  lcd.print("Temperature: ");
  lcd.print(temperature);
  lcd.print("C");
  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(humidity);
  lcd.print("%");
  if (temperature > 25) {
    digitalWrite(fanPin, HIGH);
  } else {
    digitalWrite(fanPin, LOW);
  }
  delay(1000);
}

Project Results

The project results show that the DHT11 sensor can accurately measure the temperature and humidity in the kitchen. The 16x2 LCD screen displays the temperature and humidity readings, and the fan is activated when the temperature reaches a certain limit. The project demonstrates the importance of accuracy in temperature measurement and the benefits of automatic temperature control.

Future Work

Future work can include:

Improving the accuracy of the DHT11 sensor
Adding more sensors to measure other environmental parameters
Developing a more sophisticated control system
Integrating the project with a smartphone app

References

Arduino Uno datasheet
DHT11 sensor datasheet
LiquidCrystal library documentation

Acknowledgments

Frequently Asked Questions

Q: What is the purpose of using a DHT11 sensor in this project?

A: The DHT11 sensor is used to measure the temperature and humidity in the kitchen. It provides input data to the Arduino Uno, which then displays the readings on the 16x2 LCD screen.

Q: What is the accuracy of the DHT11 sensor?

A: The DHT11 sensor has an accuracy of ±2°C for temperature and ±5% for humidity.

Q: Can I use other types of sensors instead of the DHT11 sensor?

A: Yes, you can use other types of sensors such as the DHT22 or the BMP180. However, you will need to modify the code to accommodate the new sensor.

Q: How do I connect the DHT11 sensor to the Arduino Uno?

A: To connect the DHT11 sensor to the Arduino Uno, you will need to connect the VCC pin to the 5V pin, the GND pin to the GND pin, and the DATA pin to digital pin 2.

Q: Can I use a different type of LCD screen instead of the 16x2 LCD screen?

A: Yes, you can use a different type of LCD screen such as the 20x4 LCD screen or the 16x1 LCD screen. However, you will need to modify the code to accommodate the new LCD screen.

Q: How do I connect the 16x2 LCD screen to the Arduino Uno?

A: To connect the 16x2 LCD screen to the Arduino Uno, you will need to connect the VCC pin to the 5V pin, the GND pin to the GND pin, and the SCL pin to digital pin 12, the SDA pin to digital pin 11, the RS pin to digital pin 5, the E pin to digital pin 4, and the D4 pin to digital pin 3, the D5 pin to digital pin 2.

Q: Can I use a different type of fan instead of the standard fan?

A: Yes, you can use a different type of fan such as a DC fan or a brushless fan. However, you will need to modify the code to accommodate the new fan.

Q: How do I connect the fan to the Arduino Uno?

A: To connect the fan to the Arduino Uno, you will need to connect the VCC pin to the 5V pin, the GND pin to the GND pin, and the PWM pin to digital pin 4.

Q: Can I use a different type of power supply instead of the standard power supply?

A: Yes, you can use a different type of power supply such as a USB power supply or a wall adapter. However, you will need to modify the code to accommodate the new power supply.

Q: How do I connect the power supply to the Arduino Uno?

A: To connect the power supply to the Arduino Uno, you will need to connect the VCC pin to the 5V pin and the GND pin to the GND pin.

Q: Can I use a different type of jumper wire instead of the standard jumper wire?

A: Yes, you can use a different type of jumper wire such as a breadboard jumper wire or a wire jumper wire. However, you will need to modify the code to accommodate the new jumper wire.

Q: How do I connect the jumper wire to the Arduino Uno?

A: To connect the jumper wire to the Arduino Uno, you will need to connect the VCC pin to the 5V pin, the GND pin to the GND pin, and the DATA pin to digital pin 2.

Troubleshooting

Q: My DHT11 sensor is not working properly.

A: Check the connections between the DHT11 sensor and the Arduino Uno. Make sure that the VCC pin is connected to the 5V pin, the GND pin is connected to the GND pin, and the DATA pin is connected to digital pin 2.

Q: My 16x2 LCD screen is not displaying the readings properly.

A: Check the connections between the 16x2 LCD screen and the Arduino Uno. Make sure that the VCC pin is connected to the 5V pin, the GND pin is connected to the GND pin, and the SCL pin is connected to digital pin 12, the SDA pin is connected to digital pin 11, the RS pin is connected to digital pin 5, the E pin is connected to digital pin 4, and the D4 pin is connected to digital pin 3, the D5 pin is connected to digital pin 2.

Q: My fan is not working properly.

A: Check the connections between the fan and the Arduino Uno. Make sure that the VCC pin is connected to the 5V pin, the GND pin is connected to the GND pin, and the PWM pin is connected to digital pin 4.

Conclusion

In conclusion, the project of controlling kitchen temperature using a DHT11 sensor based on Arduino Uno is a simple and effective way to monitor and control the temperature and humidity in the kitchen. The project uses a DHT11 sensor to measure the temperature and humidity, and a 16x2 LCD screen to display the readings. The project also uses a fan to cool the kitchen when the temperature reaches a certain limit. The project is a great example of how to use Arduino and sensors to create a simple and effective home automation system.

References

Arduino Uno datasheet
DHT11 sensor datasheet
LiquidCrystal library documentation
Fan datasheet
Power supply datasheet
Jumper wire datasheet