Arduino Uno-Based Simple Temperature Logger with LM35

Introduction

This project involves creating a basic temperature logger using Arduino Uno. The temperature logger will record temperature readings from a sensor and display them on a serial monitor. This project introduces the concept of data logging and temperature measurement with Arduino.

With Arduino Uno, you can easily interface with a temperature sensor to gather temperature data and log it for further analysis. This project is ideal for beginners who want to learn about data logging and sensor interfacing.

Let’s go through the materials and instructions to build your temperature logger.

Materials

• Arduino Uno board
• LM35 Temperature Sensor
• Jumper Wires
• Breadboard
• USB Cable
• Computer with Arduino IDE

Instructions

1. Connect the LM35 temperature sensor to the Arduino:
   • VCC of sensor to 5V on Arduino
   • GND of sensor to GND on Arduino
   • Output pin of sensor to analog pin A0 on Arduino
2. Open the Arduino IDE on your computer.
3. Write the following code in the Arduino IDE and upload it to your Arduino board.

          const int tempPin = A0;

          void setup() {

            Serial.begin(9600);

          }

          void loop() {

            int sensorValue = analogRead(tempPin);

            float voltage = sensorValue * (5.0 / 1023.0);

            float temperatureC = voltage * 100;  // LM35 gives 10mV/°C

            Serial.print(“Temperature: “);

            Serial.print(temperatureC);

            Serial.println(” °C”);

            delay(2000);  // Wait for 2 seconds before the next reading

          }

Explanation

This project demonstrates how to use an Arduino Uno to log temperature data. The LM35 temperature sensor outputs an analog voltage that is proportional to the temperature. The Arduino reads this voltage, converts it to a temperature value, and displays it on the Serial Monitor.

This basic temperature logger is useful for understanding how to interface sensors with Arduino and perform data logging. The project can be expanded by adding data storage or visualization features.

Conclusion

Building a temperature logger with Arduino Uno is a valuable project for learning about temperature measurement and data logging. It introduces fundamental concepts of interfacing sensors and processing data with Arduino.

Feel free to enhance this project by integrating additional sensors or data storage solutions. Arduino provides a versatile platform for building various data logging and monitoring systems.

Thank you for following this tutorial. We hope you enjoyed building your temperature logger and found it informative. Stay tuned for more Arduino projects and tutorials!