Hello, I am trying to connect a microsd (https://www.adafruit.com/product/254) with the heltec htcc-ab02 board but I am having problems getting the data to be saved in the memory, the memory detects it, but the data is not saved. I am using the example code that comes on the board:
#include <SPI.h>
#include <SD.h>const int chipSelect = GPIO2;
void setup() {
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.print(“Initializing SD card…”);
// see if the card is present and can be initialized:if (!SD.begin(chipSelect)) {
Serial.println(“Card failed, or not present”);
// don’t do anything more:
while (1);
}Serial.println(“card initialized.”);
}void loop() {
// make a string for assembling the data to log:
String dataString = “”;
// read three sensors and append to the string:
for (int analogPin = 0; analogPin < 3; analogPin++) {
int sensor = analogRead(analogPin);
dataString += String(sensor);
if (analogPin < 2) {
dataString += “,”;
}
}
// open the file. note that only one file can be open at a time,// so you have to close this one before opening another.
File dataFile = SD.open(“datalog.txt”, FILE_WRITE);
// if the file is available, write to it:
if (dataFile) {
dataFile.println(dataString);
dataFile.close();
// print to the serial port too:
Serial.println(dataString);
}// if the file isn’t open, pop up an error:
else {
Serial.println(“error opening datalog.txt”);
}
}
Could someone help me so that the data can be saved in memory please?