[SOLVED] Communication between Arduino with Wavecom Q2303A GSM modem

[xemse89]

Guys,i need help with my project
I have connected my arduino AtMega328 to Wavecom Q2303A GSM Modem using rs232 level converter(**broken link removed** i still can't configure my gsm modem to send SMS to my desired phone number.I'm using arduino 1.0 btwFollowing is my coding for the project:

#include <SoftwareSerial.h>

const int rxpin = 2; // pin used to receive 
const int txpin = 3; // pin used to transmit 
SoftwareSerial gsm(rxpin, txpin); // new serial port on pins 2 and 3
char phoneNumber[] = "60128950630";
void setup()
{
Serial.begin(9600); // 9600 baud for the built-in serial port
gsm.begin(9600); //initialize the software serial port also for 9600
delay(35000);
}
void loop()
{  

gsm.println("AT");
while(gsm.available())
    Serial.write((byte)gsm.read());
delay(500);
Serial.println();
gsm.println("AT+CMGF=1"); // set SMS mode to text
while(gsm.available())
    Serial.write((byte)gsm.read());
delay(500);
Serial.println();
gsm.print("AT+CMGS="); // now send message...
gsm.write((byte)34);// ASCII equivalent of "
gsm.print(phoneNumber);
gsm.write((byte)34); // ASCII equivalent of "
gsm.println();
while(gsm.available())
    Serial.write((byte)gsm.read());
delay(500);
Serial.println();
gsm.print("Hello, This is your Arduino"); // our message to send
gsm.write((byte)26); // ASCII equivalent of Ctrl-Z
// this will send the following to the GSM module
// on the Cellular Shield: AT+CMGS=”phonenumber”<CR>
// message<CTRL+Z><CR>
gsm.println();
while(gsm.available())
    Serial.write((byte)gsm.read());
delay(500);
Serial.println();
delay(15000); // The GSM module needs to return to an OK status



}

I have connected Tx and Rx wire from the rs232 level converter to pin 2 and pin 3 of the arduino respectively,is this correct? Can anyone point out what's wrong with my coding? I have also connected pin rts and cts at rs232 level converter together.
This is the manual for my modem http://www.ozeki.hu/attachments/588/M1206B_Manual.pdf

 

[engshahrul]

gsm.println("AT");

//you need to send 'Enter' at this line

while(gsm.available())
    Serial.write((byte)gsm.read());
delay(500);

As I comment above, I think you need to send AT then 'ENTER', so that GSM will response.

 

[xemse89]

Erm...not the case....nevertheless i have solved it,it is related to my rs232 connection

 

[robschu]

Erm...not the case....nevertheless i have solved it,it is related to my rs232 connection

Hi, how did u solve your Problem?
Can you send a final example of your code and the wiring how it works please?

Thanks
robschu

 

[mishra12]

i don't think this code will work for wavecom gsm modem this at command is for https://www.sparkfun.com/products/9607 cellular shield ? pls reply