diff --git a/lib/PayloadFormatter/PayloadFormatter.cpp b/lib/PayloadFormatter/PayloadFormatter.cpp
new file mode 100644
index 0000000..e41f6e0
--- /dev/null
+++ b/lib/PayloadFormatter/PayloadFormatter.cpp
@@ -0,0 +1,68 @@
+#include "PayloadFormatter.h"
+
+PayloadFormatter::PayloadFormatter(uint8_t numOfRow, uint8_t numOfColumn) : _totalPayloads(0), _currentPayload(0), _numOfRow(numOfRow), _numOfColumn(numOfColumn), _payload(NULL), _length(0)
+{
+  _length = numOfRow * numOfColumn * 2 + 7 + 1;
+  _payload = (uint8_t *) calloc(_length, sizeof(uint8_t));
+}
+PayloadFormatter::~PayloadFormatter()
+{
+  free(_payload);
+}
+
+void PayloadFormatter::startSession(uint8_t totalPayloads)
+{
+  _totalPayloads = totalPayloads;
+  _currentPayload = 0;
+}
+
+boolean PayloadFormatter::endSession()
+{
+  boolean ret = _currentPayload == _totalPayloads;
+  if(ret)_totalPayloads = 0;
+  
+  return ret;
+}
+
+int16_t PayloadFormatter::buildPayload(uint8_t **buffer, DateTime *dateTime, double *tempArray)
+{
+  *buffer = _payload;
+  if(_currentPayload == _totalPayloads || !_totalPayloads)
+  {
+      *_payload = '\0';
+      return 0;
+  }
+    
+  _currentPayload++;
+
+  //Octet avec nombre de trames et numero de la trame
+  _payload[0] = _totalPayloads;
+  _payload[0] &= 0x0F;//Permet  de mettre à 0 les overflow
+  _payload[0] |= _currentPayload << 4;
+
+  //Octet avec nombre de ligne et nombre de colonne de capteurs
+  _payload[1] = _numOfRow;
+  _payload[1] &= 0x0F;//Permet  de mettre à 0 les overflow
+  _payload[1] |= _numOfColumn << 4;
+
+  //5 octets de dates
+  _payload[2] = dateTime->year() - 2000;
+  _payload[3] = dateTime->month();
+  _payload[4] = dateTime->day();
+  _payload[5] = dateTime->hour();
+  _payload[6] = dateTime->minute();
+
+  //Partie temperature
+  for(int i(7),j(0); j < (_numOfRow * _numOfColumn); i+=2, j++)
+  {
+    //Format Q10.6
+    int16_t q10_6 = round(tempArray[j] * pow(2,6));
+    
+    _payload[i] = q10_6 >> 8;
+    _payload[i+1] = q10_6;
+
+  }
+
+  _payload[_length-1] = '\0';
+  return _length - 1;
+}
diff --git a/lib/PayloadFormatter/PayloadFormatter.h b/lib/PayloadFormatter/PayloadFormatter.h
new file mode 100644
index 0000000..b7032a7
--- /dev/null
+++ b/lib/PayloadFormatter/PayloadFormatter.h
@@ -0,0 +1,27 @@
+#ifndef PAYLOADFORMATTER_H
+#define PAYLOADFORMATTER_H
+#include <math.h>
+#include "RTClib.h" //Nécessaire afin d'utiliser l'object DateTime
+
+class PayloadFormatter
+{
+  public:
+    PayloadFormatter(uint8_t numOfRow, uint8_t numOfColumn);
+    ~PayloadFormatter();
+
+    int16_t buildPayload(uint8_t **buffer, DateTime *dateTime, double *tempArray);
+    void startSession(uint8_t totalPackets);
+    boolean endSession();
+    
+  protected:
+  private:
+  
+    uint8_t _totalPayloads;
+    uint8_t _currentPayload;
+    uint8_t _numOfRow;
+    uint8_t _numOfColumn;
+    uint8_t *_payload;
+    uint8_t _length;
+};
+
+#endif //PAYLOADFOMATTER_H
diff --git a/lib/PayloadFormatter/PayloadFormatter.ino b/lib/PayloadFormatter/PayloadFormatter.ino
new file mode 100644
index 0000000..95c2b6e
--- /dev/null
+++ b/lib/PayloadFormatter/PayloadFormatter.ino
@@ -0,0 +1,9 @@
+void setup() {
+  // put your setup code here, to run once:
+
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+
+}