Sending sms to a number stored in variable

Projects Programming
1

Can anyone help me with this? I am using Gsm with arduino and want to send a message to a number I save in a variable. But my AT command does not work.
Here is the relevant portion of code:

String number1 = "03360234233";
Serial1.print("AT+CMGS=\"" + number1 + "\"");
2

Did you try Serial1.write instead?

3

Using this and printing to the serial monitor:-

String number1 = "03360234233";
Serial.print("AT+CMGS=\"" + number1 + "\"");

yields this result:-AT+CMGS="03360234233"Is that what it's supposed to look like?
(I've never used a GSM shield.)

Edit: Serial1.write("AT+CMGS=\"" + number1 + "\"");results in:-no matching function for call to 'HardwareSerial::write(StringSumHelper&)'

4

CrossRoads:
Did you try Serial1.write instead?

It gives error.

5

OldSteve:
Using this and printing to the serial monitor:-

String number1 = "03360234233";

Serial.print("AT+CMGS="" + number1 + """);



yields this result:-

AT+CMGS="03360234233"

Yes. When I insert the number instead of variable, message is sent. But with variable, there's no error and nothing is sent.

6

Which microcontroller are you using?
Serial1 will work on 1284 and 2560.
For Uno, only Serial is available. To talk to a SMS device you then need one of the software serial libraries and have to define a SerialSMS name or similar to use.

7

I am using arduino mega 2560.

8

Have you tried:-

char number1[12] = "03360234233";
Serial1.print("AT+CMGS=\"");
Serial1.print(number1);
Serial1.print("\"");

or

char number1[12] = "03360234233";
char outString[22];
sprintf_P(outString, PSTR("AT+CMGS=\"%s\""), number1);
Serial1.print(outString);

I've never used, and don't trust, the 'String' class.

9

I tried it with char array. It doesn't work too.

10

There should be no difference between this:-

char number1[12] = "03360234233";
char outString[22];
sprintf_P(outString, PSTR("AT+CMGS=\"%s\""), number1);
Serial1.print(outString);

and this:-Serial1.print("AT+CMGS=\"03360234233\"");  // You said this works.
Both should produce exactly the same result.