title: How to convert the incoming characters coming from gsm module into a string?
body: <p>Its my first time to use gsm shield to my arduino so I'm kinda confused so i need directions. My aim is to read the message sent to my gsm shield then compare that message into a specific string. if they are the same, arduino will do something. Example is, the GSM shield received a text message containing STATUS, the arduino will do something. The problem I'm stuck up with now is how to read the incoming characters from the gsm module into a single string then compare that string into a specific word. I have this code as of now.</p>
  
  <pre><code>    #include &lt;SoftwareSerial.h&gt;
      #include &lt;String.h&gt;
      char inchar[255];
      SoftwareSerial cell(2,3); 
      int led1 = 22;
      #define powerOn 4
      int i;
      //char comparestring[160];
      char command[]={'S','T','A','T','U','S','\0'}; // this is a string for command                                               ended with null terminator
      void setup()
      {
        // ilagay sa loob ng setup
        digitalWrite(powerOn, HIGH);  
        delay(1500);
        digitalWrite(powerOn, LOW);
        delay(5000);
  
        pinMode(led1, OUTPUT);
        digitalWrite(led1, LOW);
  
        Serial.begin(9600);
        cell.b-egin(9600);
        delay(30000);
        cell.println("AT+CMGF=1"); // set SMS mode to text
        delay(200);
        cell.println("AT+CNMI=1,2,0,0,0 "); // set module to send SMS data to serial out         upon receipt
        delay(200);
        Serial.println("GSM SHIELD IS NOW OK AND READY");
  
      }
      void loop()
      {
        while(cell.available() &gt;0)
        {
            inchar[i]=cell.read();
            i++;
            inchar[i] = '\0';
            Serial.print(inchar);
          if (inchar==command)
          {
            digitalWrite(led1, HIGH);
            cell.write("AT+CMGS=\"");
            cell.write("09267955775");
            cell.write("\"\r");
            delay(1000);
            cell.write("\nTerminal Monitoring System");
            delay(1000);
            cell.write(0x1A); // End the SMS with a control-z
          }
          else
          {
            Serial.println("\nInvalid Keyword! Type ?");
    dig-italWrite(led1, LOW);
          }
          }
          }
  </code></pre>
  
  <p>these codes are the codes that supposed to do the trick but i think its not working. I hope you can teach me the right way. Thank you!</p>
  
  <pre><code>      while(cell.available() &gt;0)
        {
            inchar[i]=cell.read();
            i++;
            inchar[i] = '\0';
            Serial.print(inchar);
          if (inchar==command)
  </code></pre>