diff --git a/LoRaSender/LoRaSender.ino b/LoRaSender/LoRaSender.ino
index b27c3b2..1ccfe72 100644
--- a/LoRaSender/LoRaSender.ino
+++ b/LoRaSender/LoRaSender.ino
@@ -5,7 +5,7 @@
 #include <Adafruit_SSD1306.h>
 #include <TinyGPS++.h>
 
-#include "SDCardHelper.ino"
+#include "SDCardHelper.hpp"
 
 // LORA Settings
 #define SYNC_WORD 0xCE
diff --git a/LoRaSender/SDCardHelper.ino b/LoRaSender/SDCardHelper.hpp
similarity index 94%
rename from LoRaSender/SDCardHelper.ino
rename to LoRaSender/SDCardHelper.hpp
index cc6eec3..06d15be 100644
--- a/LoRaSender/SDCardHelper.ino
+++ b/LoRaSender/SDCardHelper.hpp
@@ -1,3 +1,4 @@
+#pragma once
 #include <SPI.h>
 #include <SD.h>
 
@@ -13,7 +14,7 @@ private:
   File _stream;
   String _filename;
   bool _available = false;
-  SPIClass _spi(HSPI);
+  SPIClass _spi;
 
   String getNewFilename() {
     static unsigned long i = 0;
@@ -25,7 +26,7 @@ private:
   }
 
 public:
-  SDHelper(uint8_t csPin, FileAccessMode fam, String filename = "") : _cs(csPin), _fam(fam) {
+  SDHelper(uint8_t csPin, FileAccessMode fam, String filename = "") : _cs(csPin), _fam(fam), _spi(HSPI){
     _spi.begin(14, 2, 15, 13);
     if(!SD.begin(_cs, _spi)){ 
       _available = false;