#include <SPI.h>
#include <SD.h>

const int chipSelect = 4; // CS pin of the SD card module
const int analogPin = A0; // Analog pin to read sensor data

File dataFile;

void setup() {
  Serial.begin(9600);
    pinMode(chipSelect, OUTPUT);

      // Initialize the SD card
        if (!SD.begin(chipSelect)) {
            Serial.println("Card failed, or not present");
                return;
                  }

                    Serial.println("Card initialized.");
                    }

                    void loop() {
                      // Read sensor data
                        int sensorValue = analogRead(analogPin);

                          // Open or create a file
                            dataFile = SD.open("datalog.txt", FILE_WRITE);

                              // If the file is available, write to it
                                if (dataFile) {
                                    dataFile.println(sensorValue);
                                        dataFile.close();
                                            Serial.println(sensorValue);
                                              } else {
                                                  Serial.println("Error opening datalog.txt");
                                                    }

                                                      // Delay for a while before the next reading (adjust as needed)
                                                        delay(1000);
                                                        }
                                                        #include <SPI.h>
                                                        #include <SD.h>

                                                        const int chipSelect = 4; // CS pin of the SD card module
                                                        const int analogPin = A0; // Analog pin to read sensor data

                                                        File dataFile;

                                                        void setup() {
                                                          Serial.begin(9600);
                                                            pinMode(chipSelect, OUTPUT);

                                                              // Initialize the SD card
                                                                if (!SD.begin(chipSelect)) {
                                                                    Serial.println("Card failed, or not present");
                                                                        return;
                                                                          }

                                                                            Serial.println("Card initialized.");
                                                                            }

                                                                            void loop() {
                                                                              // Read sensor data
                                                                                int sensorValue = analogRead(analogPin);

                                                                                  // Open or create a file
                                                                                    dataFile = SD.open("datalog.txt", FILE_WRITE);

                                                                                      // If the file is available, write to it
                                                                                        if (dataFile) {
                                                                                            dataFile.println(sensorValue);
                                                                                                dataFile.close();
                                                                                                    Serial.println(sensorValue);
                                                                                                      } else {
                                                                                                          Serial.println("Error opening datalog.txt");
                                                                                                            }

                                                                                                              // Delay for a while before the next reading (adjust as needed)
                                                                                                                delay(1000);
                                                                                                                }
                                                                                                                #include <SPI.h>
                                                                                                                #include <SD.h>

                                                                                                                const int chipSelect = 4; // CS pin of the SD card module
                                                                                                                const int analogPin = A0; // Analog pin to read sensor data

                                                                                                                File dataFile;

                                                                                                                void setup() {
                                                                                                                  Serial.begin(9600);
                                                                                                                    pinMode(chipSelect, OUTPUT);

                                                                                                                      // Initialize the SD card
                                                                                                                        if (!SD.begin(chipSelect)) {
                                                                                                                            Serial.println("Card failed, or not present");
                                                                                                                                return;
                                                                                                                                  }

                                                                                                                                    Serial.println("Card initialized.");
                                                                                                                                    }

                                                                                                                                    void loop() {
                                                                                                                                      // Read sensor data
                                                                                                                                        int sensorValue = analogRead(analogPin);

                                                                                                                                          // Open or create a file
                                                                                                                                            dataFile = SD.open("datalog.txt", FILE_WRITE);

                                                                                                                                              // If the file is available, write to it
                                                                                                                                                if (dataFile) {
                                                                                                                                                    dataFile.println(sensorValue);
                                                                                                                                                        dataFile.close();
                                                                                                                                                            Serial.println(sensorValue);
                                                                                                                                                              } else {
                                                                                                                                                                  Serial.println("Error opening datalog.txt");
                                                                                                                                                                    }

                                                                                                                                                                      // Delay for a while before the next reading (adjust as needed)
                                                                                                                                                                        delay(1000);
                                                                                                                                                                        }