add another example sketch, fixed a bug in the service request sketch

examples/SDIPassthroughExample/SDIPassthroughExample.ino

@@ -0,0 +1,67 @@
+#include <SDISerial.h>
+
+
+/*
+I used a few devices with no problem using a MEGA 2560 as well as an UNO.
+Sketch was built with Arduino 1.0.4, however I also tested it under 1.0.0
+Place the SDISerial folder in    "<ARDUINO_ROOT>/libraries"
+
+with the 5TE 
+the WHITE wire is power. 
+   - I hooked it up to the arduino 5v output pin, however you could also connect it to a pin and drive power only when you wanted it
+the RED wire is the DATA_LINE.
+   - you must hook it up to a pin that can process interrupts (see link below)
+   
+the remaining wire must be connected to ground
+*/
+
+//in order to recieve data you must choose a pin that supports interupts
+#define DATALINE_PIN 2
+#define INVERTED 1
+#define MAX_TIMEOUT 1000
+//see:   http://arduino.cc/en/Reference/attachInterrupt
+//for pins that support interupts (2 or 3 typically)
+
+
+SDISerial connection(DATALINE_PIN, INVERTED);
+char b_in[125];
+char output_buffer[255];
+char tmp_buffer[10];
+
+
+void wait_for_message(char* buffer,char terminal){
+   Serial.println("Waiting For input...");
+   int i=0;
+   while( true){
+     if(!Serial.available())delay(500);
+     else{
+        buffer[i] = Serial.read();
+        if(buffer[i] == terminal){
+          buffer[i+1] = '\0';
+          return;
+        }
+        i+=(buffer[i] >= 32 && buffer[i] <= 127);
+     } 
+   }
+
+}
+
+void setup(){
+   Serial.begin(9600);
+   connection.begin();
+   delay(1000);
+   Serial.println("Initialization Complete");
+
+}
+void loop(){
+
+   wait_for_message(b_in,'!');
+   sprintf(output_buffer,"[out]:%s",b_in?b_in:"No Output");
+   Serial.println(output_buffer);
+   char *response =connection.sdi_query(b_in,MAX_TIMEOUT);
+   sprintf(output_buffer,"[in]:%s",response?response:"No Response");
+   Serial.println(output_buffer);
+   Serial.flush();
+   delay(1000);
+
+}

examples/ServiceRequestExample/ServiceRequestExample.ino

@@ -31,7 +31,7 @@ void setup(){
   Serial.begin(9600); // start our uart
   Serial.println("OK INITIALIZED"); // startup string echo'd to our uart
   delay(3000); // startup delay to allow sensor to powerup and output its DDI serial string
-  char* sensor_info = connection.sdi_query("?I!"); // get sensor info
+  char* sensor_info = connection.sdi_query("?I!",1000); // get sensor info
   //print to uart
   sprintf(output_buffer,"Sensor Info: %s",sensor_info?sensor_info:"No Response");
   Serial.println(output_buffer);