Temperature and Humidity Monitoring System using Arduino Nano & DHT11

Overview

This project is a real-time Temperature and Humidity Monitoring System built using Arduino Nano and DHT11 sensor. It measures environmental conditions and displays them on a 16x2 LCD display. This system is simple, low-cost, and useful for applications like weather monitoring, smart homes, and industrial environments.

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Features

• Real-time temperature monitoring
• Humidity measurement
• LCD display output
• Low-cost and efficient system
• Continuous data updates every 2 seconds

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Components Used

• Arduino Nano
• DHT11 Temperature & Humidity Sensor
• 16x2 LCD Display (I2C)
• Breadboard
• Jumper Wires
• USB Cable

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Working

The system works by sensing environmental conditions and displaying them in real time.

• The DHT11 sensor continuously measures the surrounding temperature and humidity.
• It converts these physical values into digital signals.
• The Arduino Nano reads this data from the sensor through a digital input pin.
• The microcontroller processes the received data and checks for valid readings.
• The processed temperature and humidity values are sent to the 16x2 LCD display.
• The LCD displays temperature in degree Celsius (°C) and humidity in percentage (%).
• The readings are updated every 2 seconds, providing real-time monitoring.

This system provides a simple, low-cost, and efficient way to monitor environmental conditions.

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Circuit Connections

• DHT11 VCC → 5V

• DHT11 GND → GND

• DHT11 Data → D7

• LCD VCC → 5V

• LCD GND → GND

• LCD SDA → A4

• LCD SCL → A5

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Code

The Arduino code is included in this repository

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Project Images

The LCD displays:

* Temperature in °C
* Humidity in %

This image shows the complete working steup of Arduino Nano with DHT11 Sensor and LCD display

Future Improvements

• Add IoT support for remote monitoring
• Mobile app connectivity
• Data logging and analytics
• Alert system for high temperature

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Author

Khushi Bhagat

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