Displaying sensor data on screen in Arduino - Mini Project: Build & Apply

Displaying sensor data on screen

📖 Scenario: You have a temperature sensor connected to your Arduino. You want to read the temperature and show it on a small screen so anyone can see the current temperature.

🎯 Goal: Build a simple Arduino program that reads temperature data from a sensor and displays it on the screen.

📋 What You'll Learn

Create a variable to store the sensor pin number

Create a variable to store the temperature value

Read the sensor value from the correct pin

Convert the sensor reading to a temperature

Display the temperature on the screen using Serial.println()

💡 Why This Matters

🌍 Real World

Displaying sensor data on a screen is common in weather stations, home automation, and health monitoring devices.

💼 Career

Understanding how to read sensors and show data is a key skill for embedded systems and IoT developers.

1

Setup sensor pin variable

Create an int variable called sensorPin and set it to A0 to represent the analog pin where the temperature sensor is connected.

Arduino

int sensorPin = A0;  // Your code here

Hint

The temperature sensor is connected to analog pin A0. Use int sensorPin = A0; to store this.

2

Setup temperature variable

Create an int variable called temperature and set it to 0 to hold the temperature value.

Arduino

int sensorPin = A0;
int temperature = 0;  // Your code here

Hint

We need a variable to store the temperature reading. Use int temperature = 0;.

3

Read sensor and convert to temperature

In the loop() function, read the analog value from sensorPin using analogRead(sensorPin) and store it in an int variable called sensorValue. Then convert sensorValue to temperature in Celsius by using the formula temperature = (sensorValue * 5.0 / 1023) * 100.

Arduino

int sensorPin = A0;
int temperature = 0;

void setup() {
  Serial.begin(9600);
}

void loop() {
  int sensorValue = analogRead(sensorPin);  // Your code here
  temperature = (sensorValue * 5.0 / 1023) * 100;  // Your code here
}

Hint

Use analogRead(sensorPin) to get the sensor value. Then convert it to Celsius with the formula given.

4

Display temperature on screen

Use Serial.println() to print the text "Temperature: " followed by the temperature variable and the degree symbol "\xB0C" inside the loop() function. This will show the temperature on the serial monitor.

Arduino

int sensorPin = A0;
int temperature = 0;

void setup() {
  Serial.begin(9600);
}

void loop() {
  int sensorValue = analogRead(sensorPin);
  temperature = (sensorValue * 5.0 / 1023) * 100;
  Serial.println("Temperature: " + String(temperature) + "\xB0C");  // Your code here
}

Hint

Use Serial.println("Temperature: " + String(temperature) + "\xB0C") to show the temperature with the degree symbol.