title: How to use response from sim900 module?
body: <p>Thanks in advance. I am using arduino and sim900 module to send my sensor data by SMS.</p>
  
  <p>Now I want to check SMS left in my sim card. I'm using below code to do that.<code>("AT+CUSD=1,\"*451#\"\r")</code>.</p>
  
  <p>I want to send that response to my mobile. but i don't know how to do that. Any one please help me.</p>
  
  <p>Thank you.</p>