Dzień dobry,

Arduino Mega i taki kod:

#include <SPI.h>
#include <SD.h>
File myFile;
File meFile;
String file_name;
String file_name2;
int filenameNumber = 1;
int fileData = 0;

void createlogFile() {
String ext = ".txt";
String ext2 = ".tx";
while (1) {
file_name = filenameNumber + ext;
file_name2 = filenameNumber + ext2;
if (SD.exists(file_name) == false) {
break;
} else {
filenameNumber++;
}
}
myFile = SD.open(file_name, FILE_WRITE);
myFile.close();

if (SD.exists(file_name)) {
Serial.print("1. Log file: ");
Serial.print(file_name);
Serial.println(" created.");
}
delay(50);
meFile = SD.open(file_name2, FILE_WRITE);
meFile.close();

if (SD.exists(file_name2)) {
Serial.print("1. Log file: ");
Serial.print(file_name2);
Serial.println(" created.");
}
}

void updatelogFile() {
delay(50);
if (SD.exists(file_name)) {
myFile = SD.open(file_name, FILE_WRITE);
myFile.print("# ");
myFile.println(fileData);
myFile.close();
Serial.print("2. Log file: ");
Serial.print(file_name);
Serial.println(" updated.");
} else {
Serial.print("2. File ");
Serial.print(file_name);
Serial.println(" doesn't exist.");
}
delay(50);
if (SD.exists(file_name2)) {
meFile = SD.open(file_name2, FILE_WRITE);
meFile.print("# ");
meFile.println(fileData);
meFile.close();
Serial.print("2. Log file: ");
Serial.print(file_name2);
Serial.println(" updated.");
} else {
Serial.print("2. File ");
Serial.print(file_name2);
Serial.println(" doesn't exist.");
}
}

void setup() {
Serial.begin(115200);
Serial.print(F("Initializing SD card..."));
while (!SD.begin(53)) {
Serial.println(F("initialization failed!"));
}
Serial.println(F("initialization done."));
createlogFile();
}

void loop() {
updatelogFile();
delay(1000);
fileData++;
}

Kompiluje się to bez problemów i daje taki log:

Initializing SD card...initialization done.
1. Log file: 2.txt created.
1. Log file: 2.tx created.
2. Log file: 2.txt updated.
2. Log file: 2.tx updated.
2. File 2.txt doesn't exist.
2. File 2.tx doesn't exist.
2. File 2.txt doesn't exist.

na karcie pliki oczywiście istnieją:

Volume in drive E has no label.
Volume Serial Number is 6CE0-F3F8

Directory of E:\

01/01/2000 01:00 654 1.TXT
01/01/2000 01:00 8 1.TX
01/01/2000 01:00 3 2.TXT
01/01/2000 01:00 0 2.TX
23/01/2020 11:22 <DIR> libraries
23/01/2020 11:22 <DIR> hardware
26/01/2020 13:26 0 log2.txt
5 File(s) 665 bytes
2 Dir(s) 7,897,579,520 bytes free

Bardzo proszę o podpowiedź co robię źle, dlaczego pliki nie są uaktualniane?

Pomożecie? Z góry bardzo dziękuję.

--
Michał