Create microSD card test

iot/MicroSDTest/MicroSDTest.ino

@@ -0,0 +1,87 @@
+/*
+   SD card read/write
+
+   This example shows how to read and write data to and from an SD card file
+   The circuit:
+ * SD card attached to SPI bus as follows:
+ ** MOSI - pin 11
+ ** MISO - pin 12
+ ** CLK - pin 13
+ ** CS - pin 9
+
+   LED on pin 5
+
+   This example code is in the public domain.
+
+ */
+#include <SPI.h>
+#include <SD.h>
+
+#define PIN_SPI_DATA		9
+#define	PIN_SPI_CHIP_SELECT	3
+
+File myFile;
+
+void setup()
+{
+	int i;
+	Serial.begin(9600);
+	Serial.println("\r\nHobbytronics Test Program for SD card...");
+	Serial.println("Initializing SD card...");
+	// On the Ethernet Shield, CS is pin 4. It's set as an output by default.
+	// Note that even if it's not used as the CS pin, the hardware SS pin
+	// (10 on most Arduino boards, 53 on the Mega) must be left as an output
+	// or the SD library functions will not work.
+	pinMode(PIN_SPI_CHIP_SELECT, OUTPUT);
+
+	if (!SD.begin(PIN_SPI_DATA)) {
+		Serial.println("initialization failed!");
+		return;
+	}
+	Serial.println("initialization done.");
+
+	if (SD.exists("test.txt"))
+		SD.remove("test.txt");
+
+	myFile = SD.open("test.txt", FILE_WRITE);
+
+	// if the file opened okay, write to it:
+	if (myFile) {
+		Serial.println("Writing to test.txt...");
+		Serial.println("Hobbytronics Test");
+		for(i=0; i<20; i++)
+		{
+			myFile.println("Hobbytronics Test of file writing");
+		}
+
+		// close the file:
+		myFile.close();
+		Serial.println("done.");
+	} else {
+		// if the file didn't open, print an error:
+		Serial.println("error opening test.txt");
+	}
+
+	// re-open the file for reading:
+	Serial.println("\n\rReading from test.txt...");
+	myFile = SD.open("test.txt");
+	if (myFile) {
+
+		// 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");
+	}
+	Serial.println("Test Complete.");
+}
+
+void loop()
+{
+	// nothing happens after setup
+}