Speichern von verschiedenen Messwerten auf SD-Karte

[Andreas G. (gandy)]

Hallo Community,

bin Arduinoneuling und hab ein Problem beim Speichern meiner Daten auf 
die SD-Karte. Ich benutze einen Arduino Uno, ADXL345 und Ultimate GPS 
Datenlogger Shield (beide Adafruit)

Obwohl ich schon viel im Internet gesucht und gefunden habe, konnte ich 
mein Problem nicht lösen.

in meinem Seriellen Monitor erhalte ich die gewünschten Daten von meinen 
Shield und B.Sensor.

Nun würde ich diese gerne auf die SD-Karte speichern. Dazu verwende ich 
die SD-lib. von Adafruit.

Mein Code:

 

#include <SPI.h>
#include <SD.h>

#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_ADXL345_U.h>

#include <Adafruit_GPS.h>
#include <SoftwareSerial.h>

Adafruit_ADXL345_Unified accel = Adafruit_ADXL345_Unified(12345);

// If you're using a GPS module:
// Connect the GPS Power pin to 5V
// Connect the GPS Ground pin to ground
// If using software serial (sketch example default):
//   Connect the GPS TX (transmit) pin to Digital 3
//   Connect the GPS RX (receive) pin to Digital 2
// If using hardware serial (e.g. Arduino Mega):
//   Connect the GPS TX (transmit) pin to Arduino RX1, RX2 or RX3
//   Connect the GPS RX (receive) pin to matching TX1, TX2 or TX3

// If you're using the Adafruit GPS shield, change
// SoftwareSerial mySerial(3, 2); -> SoftwareSerial mySerial(8, 7);
// and make sure the switch is set to SoftSerial

// If using software serial, keep this line enabled
// (you can change the pin numbers to match your wiring):
SoftwareSerial mySerial(8, 7);

// If using hardware serial (e.g. Arduino Mega), comment out the
// above SoftwareSerial line, and enable this line instead
// (you can change the Serial number to match your wiring):

//HardwareSerial mySerial = Serial1;

const int chipSelect = 10;
File dataFile;

Adafruit_GPS GPS(&mySerial);


// Set GPSECHO to 'false' to turn off echoing the GPS data to the Serial console
// Set to 'true' if you want to debug and listen to the raw GPS sentences.
#define GPSECHO  true

// this keeps track of whether we're using the interrupt
// off by default!
boolean usingInterrupt = false;
void useInterrupt(boolean); // Func prototype keeps Arduino 0023 happy

void setup()
{

  // connect at 115200 so we can read the GPS fast enough and echo without dropping chars
  // also spit it out
  Serial.begin(115200);





  // SD CARD
  
  // Open serial communications and wait for port to open:
  //Serial.begin(9600);
   while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }
   // SD CARD
  Serial.print("Initializing SD card...");
  // make sure that the default chip select pin is set to
  // output, even if you don't use it:
  pinMode(SS, OUTPUT);
  
  // 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.");
  
  // Open up the file we're going to log to!
  dataFile = SD.open("datalog.txt", FILE_WRITE);
  if (! dataFile) {
    Serial.println("error opening datalog.txt");
    // Wait forever since we cant write data
    while (1) ;
  }




  // BESCHLEUNIGUNGSSENSOR

  /* Initialise the sensor */
  if (!accel.begin())
  {
    /* There was a problem detecting the ADXL345 ... check your connections */
    Serial.println("Ooops, no ADXL345 detected ... Check your wiring!");
    while (1);
  }




  // GPS
  // 9600 NMEA is the default baud rate for Adafruit MTK GPS's- some use 4800
  GPS.begin(9600);

  // uncomment this line to turn on RMC (recommended minimum) and GGA (fix data) including altitude
  GPS.sendCommand(PMTK_SET_NMEA_OUTPUT_RMCGGA);
  // uncomment this line to turn on only the "minimum recommended" data
  // GPS.sendCommand(PMTK_SET_NMEA_OUTPUT_RMCONLY);
  // For parsing data, we don't suggest using anything but either RMC only or RMC+GGA since
  // the parser doesn't care about other sentences at this time

  // Set the update rate
  GPS.sendCommand(PMTK_SET_NMEA_UPDATE_1HZ);   // 1 Hz update rate
  // For the parsing code to work nicely and have time to sort thru the data, and
  // print it out we don't suggest using anything higher than 1 Hz

  // Request updates on antenna status, comment out to keep quiet
  GPS.sendCommand(PGCMD_ANTENNA);

  // the nice thing about this code is you can have a timer0 interrupt go off
  // every 1 millisecond, and read data from the GPS for you. that makes the
  // loop code a heck of a lot easier!
  useInterrupt(true);

  delay(1000);
  // Ask for firmware version
  mySerial.println(PMTK_Q_RELEASE);
}


// Interrupt is called once a millisecond, looks for any new GPS data, and stores it
SIGNAL(TIMER0_COMPA_vect) {
  char c = GPS.read();
  // if you want to debug, this is a good time to do it!
#ifdef UDR0
  if (GPSECHO)
    if (c) UDR0 = c;
  // writing direct to UDR0 is much much faster than Serial.print
  // but only one character can be written at a time.
#endif
}

void useInterrupt(boolean v) {
  if (v) {
    // Timer0 is already used for millis() - we'll just interrupt somewhere
    // in the middle and call the "Compare A" function above
    OCR0A = 0xAF;
    TIMSK0 |= _BV(OCIE0A);
    usingInterrupt = true;
  } else {
    // do not call the interrupt function COMPA anymore
    TIMSK0 &= ~_BV(OCIE0A);
    usingInterrupt = false;
  }
}

uint32_t timer = millis();
void loop()                     // run over and over again
{

  /* Get a new sensor event */
  sensors_event_t event;
  accel.getEvent(&event);


  // SD CARD - ABSPEICHERN

  // make a string for assembling the data to log:

  String dataString = "";
  int x =(event.acceleration.x);
  int y =(event.acceleration.y);
  int z =(event.acceleration.z);

//  dataString += String(x, y, z); funktioniert nicht! 


  

  dataFile.println(dataString);

  // print to the serial port too:
  Serial.println(dataString);
  
  // The following line will 'save' the file to the SD card after every
  // line of data - this will use more power and slow down how much data
  // you can read but it's safer! 
  // If you want to speed up the system, remove the call to flush() and it
  // will save the file only every 512 bytes - every time a sector on the 
  // SD card is filled with data.
  dataFile.flush();


  
  // BESCHLEUNIGUNGSSENSOR 

  // if a sentence is received, we can check the checksum, parse it...
  if (GPS.newNMEAreceived()) {
    
  //  if (GPS.fix) {

      /* Display the results (acceleration is measured in m/s^2)  
       */
      Serial.print(event.acceleration.x); Serial.print("; ");
      Serial.print(event.acceleration.y); Serial.print("; ");
      Serial.print(event.acceleration.z); Serial.print("; "); Serial.println(" ");
      delay(1000);

      

   }   
  }

Jedoch ohne Erfolg, ich hoffe ihr könnt mir Tipps geben

Vielen Dank

Gandy

[Alex R. (itaxel)]

Andreas G. schrieb:
> dataString += String(x, y, z);

????????
Schau dir mal die Referenz zum String Objekt an.

Probiers mal so:
dataString = String(x + ',' + y + ',' + z);