need help with gsm module A6

Official Hardware Retired GSM Shield
1

Hello
i'm a newbie in arduino programming. i use A6 gsm module with arduino uno. and I found this exemple in your forum. that use pin 2 and 4 for communication. but i need to use pins 0 and 1 (rx and tx from arduino) to talk with gsm module. who can helpe me to change this proramme using pins 0 and 1

// SoftwareSerial lib allows to use digital pins for serial connection
#include <SoftwareSerial.h>

// Tx of A6 linked to pin 4
const int pinRxNano = 4;
// Rx of A6 linked to pin 2
const int pinTxNano = 2;

//Enter here the phone number
const String phoneNumber= "+";
const String messageInit = "A6 ready";

//Create serial connection on the pin
SoftwareSerial A6GSM(pinRxNano, pinTxNano);

//Function waiting for "OK", used for various purposes
void Response(){
int a = 0;
Serial.println();
while(1){
if(A6GSM.available()){
String dataFromA6 =A6GSM.readString();
dataFromA6.trim();
Serial.println(dataFromA6);
a++;
if(dataFromA6.indexOf("OK")>0){break;}
}
if(a>500){a=0;break;}
delay(200);
}
}

//Function used to send "AT" to A6 until it answers with "OK"
void startAT(){
int nbAT = 0;
while(1){
if (nbAT==0){A6GSM.println("AT");Serial.print(".");}
if(A6GSM.available()){
String dataFromA6 =A6GSM.readString();
dataFromA6.trim();
Serial.println(dataFromA6);
if(dataFromA6.indexOf("OK")>0){break;}
}
delay(200);
nbAT++;
if(nbAT++>10){nbAT=0;}
}
}

//Function used to send a sms
void envoieSMS(String numeroEnvoi, String messageEnvoi) {
delay(200);
Serial.println("Selection format message SMS");
A6GSM.println("AT+CMGF=1");
Response();
delay(200);
Serial.println("Envoi message SMS");
A6GSM.print("AT+CMGS="");
A6GSM.print(numeroEnvoi);
A6GSM.println(""");
delay(200);
A6GSM.print(messageEnvoi);
delay(200);
A6GSM.println (char(26));
Response();
}

void setup() {
//GSM serial connection
A6GSM.begin(9600);
//Usual serial connection to display on console
Serial.begin(9600);
delay(200);
Serial.println("Init");
//AT
startAT();
envoieSMS(phoneNumber,messageInit);
}

void loop() {
}

2

It would have been easier to read you code if you had enclosed it in code tags, as requested in the sticky at the top of each page of the forum - How to get the best out of this forum (short version)

If you change the code provided to use pins 0 & 1 to communicate with the A6 then where are your Serial.prints going to go? You lose the ability to communicate with Serial monitor.

To modify the code as you wish, remove all Serial.print and Serial.println lines of code, get rid of the SoftwareSerial lines and finally then change all the A6GSM references to Serial. It may take a little fine tuning after you have done that.

However, I doubt that it will then work the way you want it to.