diff --git a/doc/decodeur.js b/doc/decodeur.js
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+++ b/doc/decodeur.js
@@ -0,0 +1,74 @@
+/**
+*	Anatole SCHRAMM-HENRY
+*	Tim THUREL
+*	GROUPE 3
+**/
+
+function DecodeByteFirstHalf(data) //Data de type byte
+{
+	return data & 0x0F;
+}
+
+function DecodeByteSecondHalf(data) //Data de type byte
+{
+	return data >> 4;
+}
+
+function DecodeDatePart(data, index)
+{
+	return {
+		year   : data[index]+2000,
+		month  : data[index+1],
+		day    : data[index+2],
+		hour   : data[index+3],
+		minute : data[index+4], 
+	};
+	
+}
+
+//10 bits (1 de signe et 9 de valeur) pour
+//la partie entière et 6 bits pour la partie fractionnaire
+function DecodeQ10_6(data, index)
+{
+  var temp = (data[index] << 8) | data[index + 1];
+	
+	//Regarde si la valeur et positive ou négative
+	if((temp & 0x8000) !== 0)
+	{
+		//Valeur négative on fait le complément à deux
+		temp = ~temp;
+		temp &= 0x7FFF ;
+		temp++;
+		temp *= -1*Math.pow(2,-6);
+	}
+	else
+	  temp *= Math.pow(2,-6);
+	
+	
+	return temp;
+}
+
+function Decoder(bytes, port) {
+   // Decode an uplink message from a buffer
+   // (array) of bytes to an object of fields.
+   var listToReturn = {}, decoded = {}, sensorNbr = 0;
+   
+   decoded.packetNbr = DecodeByteFirstHalf(bytes[0]);
+   decoded.packetId  = DecodeByteSecondHalf(bytes[0]);
+   decoded.sensorRow = DecodeByteFirstHalf(bytes[1]);
+   decoded.sensorCol = DecodeByteSecondHalf(bytes[1]);
+   sensorNbr = decoded.sensorRow * decoded.sensorCol;
+   
+   var date = DecodeDatePart(bytes, 2);
+   
+   for (var attrname in date) { decoded[attrname] = date[attrname]; }
+   
+   for(i = 0; i < sensorNbr*2; i+=2)
+   {
+	   decoded["t_"+Number(i/2+1)] = DecodeQ10_6(bytes, 7+i);
+   }
+   
+   listToReturn[0] = decoded;
+
+   return listToReturn;
+}
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