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- int CS_PIN = 4;
- File file;
- void setup()
- {
- Serial.begin(9600);
- pinMode(10, OUTPUT);
- digitalWrite(10, HIGH);
- Serial.print("Initializing SD card...");
- if (!SD.begin(CS_PIN)) {
- Serial.println("Card failed, or not present");
- return;
- }
- Serial.println("card initialized.");
- }
- void loop() {
- String dataString = "TEST";
- File dataFile = SD.open("datalog.txt");
- if (dataFile) {
- dataFile.println(dataString);
- dataFile.close();
- Serial.println(dataString);
- } else {
- Serial.println("error opening datalog.txt");
- }
- delay(1000);
- }
- SD.open("file.txt", O_RDWR | O_APPEND);
- SD.open("file.txt", O_RDWR | O_CREAT);
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