how to interface gsm module sim900a to arduino

[rupa]

helllo all,

iam using sim900a with arduino uno 

and iam want to send sms using it i have tried a program but i failed to do it no idea it is running everything in serial monitor but it is not sending msg to moblie 

my program is 

int timesTosend=1;

int count=0;

char phone_no[]="8885751592";

void setup()

{

Serial.begin(9600);

delay(2000);

Serial.println("AT+CMGF=1"); //set GSm to test mode

delay(200);

}

void loop()

{

while(count<timesTOsend){

delay(1500);

Serial.print("AT+CMGF="");

Serial.print(phone_no);

Serial.println(""");

while(Serial.read()!='>');{

Serial.print("test messsage from arduino ….hello…how r u");

delay(5000);

Serial.write(26);//sends ctrl+z end of message

delay(5000);

}

count++;

}

}

 

can anyone help me with this 

[rupa]

but u dont find anything going on serial monitor but u will get sms to ru phone

#include <SoftwareSerial.h>

 

SoftwareSerial mySerial(9, 10);

void setup()

{

mySerial.begin(9600);

Serial.begin(9600);

delay(2000);

 //set GSm to test mode

}

 

void loop()

{

  if (Serial.available()>0)

   switch(Serial.read())

 

mySerial.println("AT+CMGF=1");

delay(1000);

mySerial.println("AT+CMGS="+918885751592"r");

delay(1000);

mySerial.print("test messsage from arduino ….hello…how r u");

delay(1000);

mySerial.println((char)26);//sends ctrl+z end of message

delay(1000);

}

 

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