Hi friends,
I’m working on esp8266 wroom 02-U to read data from SD card. But unfortunately, unable to read SD card over the SPI interface and i am using a sample code that is available in Arduino IDE. In that whenever i am using Arduino UNO to read SD card it is working well as expected but not working in ESP module. Can anyone please suggest how to fix that issue?
Thank you in advance!
I referred,
#include <SPI.h>
#include <SD.h>
File myFile;
void setup() {
// Open serial communications and wait for port to open:
Serial.begin(115200);
Serial.print("Initializing SD card...");
if (!SD.begin(15)) {
//while(1)
Serial.println("initialization failed!");
return;
// delay(500);
}
Serial.println("initialization done.");
// open the file. note that only one file can be open at a time,
// so you have to close this one before opening another.
myFile = SD.open("test.txt", FILE_WRITE);
// if the file opened okay, write to it:
if (myFile) {
Serial.print("Writing to test.txt...");
myFile.println("testing 1, 2, 3.");
// close the file:
myFile.close();
Serial.println("done.");
} else {
// if the file didn't open, print an error:
Serial.println("error opening test.txt");
}
// re-open the file for reading:
myFile = SD.open("test.txt");
if (myFile) {
Serial.println("test.txt:");
// read from the file until there's nothing else in it:
while (myFile.available()) {
Serial.write(myFile.read());
}
// close the file:
myFile.close();
} else {
// if the file didn't open, print an error:
Serial.println("error opening test.txt");
}
}
void loop() {
// nothing happens after setup
}