// Libraries for SD card
#include "FS.h"
#include <SD.h>
//#include "mySD.h"
#include <SPI.h>
// Define CS pin for the SD card module
#define SD_MISO 2
#define SD_MOSI 15
#define SD_SCLK 14
#define SD_CS 13
SPIClass sdSPI(VSPI);
String dataMessage;
void setup() {
// Start serial communication for debugging purposes
Serial.begin(115200);
// Initialize SD card
//SD.begin(SD_CS);
sdSPI.begin(SD_SCLK, SD_MISO, SD_MOSI, SD_CS);
if(!SD.begin(SD_CS, sdSPI)) {
Serial.println("Card Mount Failed");
return;
}
Serial.println("1");
uint8_t cardType = SD.cardType();
if(cardType == CARD_NONE) {
Serial.println("No SD card attached");
return;
}
Serial.println("Initializing SD card...");
if (!SD.begin(SD_CS)) {
Serial.println("ERROR - SD card initialization failed!");
return; // init failed
}
Serial.println("2");
// If the data.txt file doesn't exist
// Create a file on the SD card and write the data labels
File file = SD.open("/data1.txt");
if(!file) {
Serial.println("File doens't exist");
Serial.println("Creating file...");
writeFile(SD, "/data1.txt", "Reading ID, Date, Hour, Temperature \r\n");
}
else {
Serial.println("File already exists");
}
file.close();
logSDCard();
}
void loop() {
// The ESP32 will be in deep sleep
// it never reaches the loop()
}
// Write the sensor readings on the SD card
void logSDCard() {
//dataMessage = String(readingID) + "," + String(dayStamp) + "," + String(timeStamp) + "," +
// String(temperature) + "\r\n";
dataMessage = "Hello World \n";
Serial.print("Save data: ");
Serial.println(dataMessage);
appendFile(SD, "/data1.txt", dataMessage.c_str());
}
// Write to the SD card (DON'T MODIFY THIS FUNCTION)
void writeFile(fs::FS &fs, const char * path, const char * message) {
Serial.printf("Writing file: %s\n", path);
File file = fs.open(path, FILE_WRITE);
if(!file) {
Serial.println("Failed to open file for writing");
return;
}
if(file.print(message)) {
Serial.println("File written");
} else {
Serial.println("Write failed");
}
file.close();
}
// Append data to the SD card (DON'T MODIFY THIS FUNCTION)
void appendFile(fs::FS &fs, const char * path, const char * message) {
Serial.printf("Appending to file: %s\n", path);
File file = fs.open(path, FILE_APPEND);
if(!file) {
Serial.println("Failed to open file for appending");
return;
}
if(file.print(message)) {
Serial.println("Message appended");
} else {
Serial.println("Append failed");
}
file.close();
}
This code has actually fixed my issue (ESP32s can’t detect/mount microSD card ). May someone can try it when they face it.
