Skriva till SD-kort

[mlassesg07]

http://forum.arduino.cc/index.php/topic,8863.0.html, finns lite exempel på vad man kan göra. Får vänta tills jag får leverans av delar.

[mlassesg07]

https://www.arduino.cc/en/Tutorial/Datalogger något att använda.

[mlassesg07]

https://rydepier.wordpress.com/2015/08/07/using-an-sd-card-reader-to-store-and-retrieve-data-with-arduino/

[mlassesg07]

http://www.toptechboy.com/arduino/arduino-lesson-21-log-sensor-data-to-an-sd-card/

[mlassesg07]

https://www.youtube.com/watch?v=v3QW7Jf6_GE

[mlassesg07]

https://www.youtube.com/watch?v=5Dp-XatLySM skriver till xls

[mlassesg07]

/* Writing Sensor Data to an SD card // This example shows how to write data to an SD card using the SD library. // The circuit:

• SD card attached to SPI bus as follows: MOSI - pin 11 MISO - pin 12 CLK - pin 13 CS - pin 10 Uno (53 on Mega) Based on code by Tom Igoe */ //

  include "SD.h"

  include"SPI.h"

  // //the hardware CS pin (10 on most Arduino boards, // 53 on the Mega) must be left as an output or the SD // library functions will not work. const int CSpin = 10; String dataString =""; // holds the data to be written to the SD card float sensorReading1 = 0.00; // value read from your first sensor float sensorReading2 = 0.00; // value read from your second sensor float sensorReading3 = 0.00; // value read from your third sensor File sensorData; // // void setup() { // Open serial communications Serial.begin(9600); Serial.print("Initializing SD card..."); pinMode(CSpin, OUTPUT); // // see if the card is present and can be initialized: if (!SD.begin(CSpin)) { Serial.println("Card failed, or not present"); // don't do anything more: return; } Serial.println("card initialized."); } // void loop(){ // build the data string dataString = String(sensorReading1) + "," + String(sensorReading2) + "," + String(sensorReading3); // convert to CSV saveData(); // save to SD card delay(60000); // delay before next write to SD Card, adjust as required } // void saveData(){ if(SD.exists("data.csv")){ // check the card is still there // now append new data file sensorData = SD.open("data.csv", FILE_WRITE); if (sensorData){ sensorData.println(dataString); sensorData.close(); // close the file } } else{ Serial.println("Error writing to file !"); } }