add ex. read sms

examples/SMS/reading_sms.pde

@@ -0,0 +1,32 @@
+/*
+
+			Example for Sim800l library
+	by Cristian Steib , < steibkhriz@gmail.com >
+
+		Demonstrate the use of the library
+				for send a sms. 
+
+
+			Created 24 April 2016
+
+*/
+
+#include <Sim800l.h>
+#include <SoftwareSerial.h> //is necesary for the library!! 
+Sim800l Sim800l;  //to declare the library
+String text;     // to almacenate the text of the sms
+uint8_t index;   // to indicate the message to read.
+
+
+void setup(){
+	Serial.begin(9600); // only for debug the results . 
+	Sim800l.begin(); // initializate the library. 
+	index=1; // first position in the prefered memory storage. 
+	text=Sim800l.readSms(index);   	
+	Serial.println(text);
+
+}
+
+void loop(){
+	//do nothing
+}