Added SD card writes -> Coords are stored as coords[0..].txt

LoRaSender/LoRaSender.ino

@@ -35,7 +35,7 @@
 Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
 TinyGPSPlus gps;
 
-SDHelper logger(SD_CS, FAM_W);
+SDHelper logger;
 
 void sendMessage(const String& msg) {
   LoRa.beginPacket();
@@ -116,6 +116,7 @@ void SerialPrintGPS(){
 
 void storeToSD(const String& lat, const String& lng){
   static int i = 1;
+  Serial.println("Filename: " + logger.Filename());
   logger.Log(String(i++) + ": " + lat + " " + lng);
 }