Why data logging matters in Arduino - See It in Action

Why Data Logging Matters

📖 Scenario: You are working on a simple Arduino project that measures temperature every second. To understand how temperature changes over time, you need to save these readings. This process is called data logging. It helps you keep track of information so you can analyze it later.

🎯 Goal: Build a basic Arduino program that stores temperature readings in an array and then prints all stored readings. This will show how data logging helps keep a record of measurements.

📋 What You'll Learn

Create an array called temperatureLog with space for 5 readings

Create a variable called logIndex to track where to store the next reading

Write code to add a new temperature reading (use the value 25) to temperatureLog at logIndex and then increase logIndex

Print all stored temperature readings from temperatureLog

💡 Why This Matters

🌍 Real World

Data logging is used in many devices like weather stations, fitness trackers, and cars to keep records of measurements over time.

💼 Career

Understanding data logging helps in roles like embedded systems development, IoT engineering, and quality monitoring where tracking data is essential.

1

Create the data storage

Create an integer array called temperatureLog with 5 spaces to store temperature readings.

Arduino

# Create an integer array called temperatureLog with 5 spaces
// Your code here

Need a hint?

Use int temperatureLog[5]; to create an array for 5 integers.

2

Add a logging index

Create an integer variable called logIndex and set it to 0. This will track where to save the next temperature reading.

Arduino

int temperatureLog[5];
// Create an integer variable called logIndex and set it to 0
// Your code here

Need a hint?

Use int logIndex = 0; to start the index at zero.

3

Log a temperature reading

Add the temperature reading 25 to temperatureLog at position logIndex. Then increase logIndex by 1.

Arduino

int temperatureLog[5];
int logIndex = 0;
// Store the value 25 in temperatureLog at logIndex
// Increase logIndex by 1
// Your code here

Need a hint?

Use temperatureLog[logIndex] = 25; to save the reading and logIndex++; to move to the next spot.

4

Print all logged readings

Use a for loop with variable i from 0 to 4 to print each value in temperatureLog using Serial.println().

Arduino

int temperatureLog[5];
int logIndex = 0;
void setup() {
  temperatureLog[logIndex] = 25;
  logIndex++;

  // Use a for loop to print all values in temperatureLog
  // Your code here
}

Need a hint?

Remember to start serial communication with Serial.begin(9600); in setup(). Then print each array value with Serial.println(temperatureLog[i]);.