Reading data from SD card in Arduino - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to include the SD library.

Arduino

#include [1]

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A<SD.h>

B<SPI.h>

C<Wire.h>

D<EEPROM.h>

Attempts:

3 left

💡 Hint

Common Mistakes

Including SPI.h instead of SD.h

Forgetting to include any library

The SD library is included with #include to work with SD cards.

2fill in blank

medium

Complete the code to initialize the SD card in setup().

Arduino

if (!SD.[1](4)) {
  Serial.println("Initialization failed!");
  return;
}

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Ainit

Bopen

Cstart

Dbegin

Attempts:

3 left

💡 Hint

Common Mistakes

Using SD.init() instead of SD.begin()

Using wrong pin number

SD.begin(4) initializes the SD card on pin 4.

3fill in blank

hard

Fix the error in opening the file for reading.

Arduino

File dataFile = SD.[1]("test.txt", FILE_READ);

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AopenFile

Bread

Copen

DreadFile

Attempts:

3 left

💡 Hint

Common Mistakes

Using SD.read() which reads data, not opens file

Using non-existent functions like openFile

Use SD.open() to open a file for reading or writing.

4fill in blank

hard

Fill both blanks to read and print each character from the file.

Arduino

while (dataFile.[1]()) {
  char c = dataFile.[2]();
  Serial.print(c);
}

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Aavailable

Bread

Copen

Dclose

Attempts:

3 left

💡 Hint

Common Mistakes

Using open() or close() instead of available() or read()

Not checking if data is available before reading

Use available() to check if data remains and read() to get each byte.

5fill in blank

hard

Fill all three blanks to close the file and print a message.

Arduino

dataFile.[1]();
Serial.[2]("File closed.");
while (!Serial.[3]()) {}

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Aclose

Bprintln

Cavailable

Dprint

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to close the file

Using print() instead of println() for message

Not waiting for serial data before continuing

Close the file with close(), print message with println(), and wait for serial data with available().