wno158:
Rate jetzt mal: Könnte das Ding hier sein.
Mit so einem (ähnlichen) habe ich das nachgebaut:
Arduino MEGA
SD-Card-Modul
Micro-SD-Card (SDHC) 16 GB (formatiert FAT32)

Verkabelung:
MEGA SD-Card-Modul
52 ........ SCK
51 ........ MOSI
50 ........ MISO
4 ........ CS
GND ....... GND
5V ........ VCC
Sketch "Datalogger" aus den Beispielen auf den MEGA draufgespielt:
/*
SD card datalogger
This example shows how to log data from three analog sensors
to an SD card using the SD library.
The circuit:
* analog sensors on analog ins 0, 1, and 2
* SD card attached to SPI bus as follows:
** UNO MEGA
** MOSI - pin 11 51
** MISO - pin 12 50
** CLK - pin 13 52
** CS - pin 4 4 (for MKRZero SD: SDCARD_SS_PIN)
created 24 Nov 2010
modified 9 Apr 2012
by Tom Igoe
This example code is in the public domain.
*/
#include <SPI.h>
#include <SD.h>
const int chipSelect = 4;
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");
}
}
Das Ganze 5 Minuten arbeiten lassen. Dann den Inhalt der Karte am PC inspiziert.
Es wurden etwa 1400 14000 Datensätze geschrieben. Z.B:
255,246,249
253,250,251
276,278,275
303,308,303
320,321,316
314,311,307
288,279,279
259,250,251
Alles wie zu erwarten.
Also prinzipiell funktionert das.
Wie ist deine Verkabelung, dein Sketch usw. ?
