please i need when sent message like on make led HIGH and when sent low make led LOW
/*
SMS receiver
This sketch, for the Arduino GSM shield, waits for a SMS message
and displays it through the Serial port.
Circuit:
* GSM shield attached to and Arduino
* SIM card that can receive SMS messages
created 25 Feb 2012
by Javier Zorzano / TD
This example is in the public domain.
http://arduino.cc/en/Tutorial/GSMExamplesReceiveSMS
*/
// include the GSM library
#include <GSM.h>
// PIN Number for the SIM
#define PINNUMBER ""
// initialize the library instances
GSM gsmAccess;
GSM_SMS sms;
// Array to hold the number a SMS is retreived from
char senderNumber[20];
const int led = 13;
void setup()
{
// initialize serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
Serial.println("SMS Messages Receiver");
// connection state
boolean notConnected = true;
// Start GSM connection
while(notConnected)
{
if(gsmAccess.begin(PINNUMBER)==GSM_READY)
notConnected = false;
else
{
Serial.println("Not connected");
delay(1000);
}
}
Serial.println("GSM initialized");
Serial.println("Waiting for messages");
pinMode(led,OUTPUT);
digitalWrite(led,LOW);
}
void loop()
{
char c;
// If there are any SMSs available()
if (sms.available())
{
Serial.println("Message received from:");
// Get remote number
sms.remoteNumber(senderNumber, 20);
Serial.println(senderNumber);
// An example of message disposal
// Any messages starting with # should be discarded
if(sms.peek()=='#')
{
Serial.println("Discarded SMS");
sms.flush();
}
// Read message bytes and print them
while(c=sms.read())
Serial.print(c);
if(c== 1)
{digitalWrite(led,HIGH);
}
if(c== 0)
{digitalWrite(led,LOW);
}
Serial.println("\nEND OF MESSAGE");
// Delete message from modem memory
sms.flush();
Serial.println("MESSAGE DELETED");
}
delay(1000);
}
i receive message without make action for led ineed to know how check condition when receive message
// Read message bytes and print them
while(c=sms.read())
Serial.print(c);
if(c== 1)
{digitalWrite(led,HIGH);
}
if(c== 0)
{digitalWrite(led,LOW);
}
Serial.println("\nEND OF MESSAGE");
// Delete message from modem memory
sms.flush();
Serial.println("MESSAGE DELETED");
}
how check c if message sent 1 for HIGH and 0 for LOW