script for writing to an SD card, to eventually be combined with the script to measure voltage

write to SD card

+#include <SPI.h>
+#include <SD.h>
+File myFile;
+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...");
+if (!SD.begin(10)) {
+Serial.println("initialization failed!");
+while (1);
+}
+Serial.println("initialization done.");
+// open the file for reading:
+myFile = SD.open("test.txt");
+if (myFile) {
+Serial.println("test.txt:");
+// read from the file until there's nothing else in it:
+while (myFile.available()) {
+Serial.write(myFile.read());
+}
+// close the file:
+myFile.close();
+} else {
+// if the file didn't open, print an error:
+Serial.println("error opening test.txt");
+}
+}