AT Command response into variable

Projects Programming
1

Hi, i am developing a project that send data from sensor to web server through SIM800l GSM/GPRS module. I want to know how can I get AT command response and save it into a variable.
For example, I want to know the signal strenght using AT command "AT+CSQ". In serial monitor I can see the response, but i want to take that response and display in a screen or light on a red led if signal = 0 or green led if signal > 0.

The response of AT+CSQ command is: "+CSQ: 0,0" (I have no signal), so I want to light on a red LED in this case.

Portion of my code:

#include <SoftwareSerial.h>  
SoftwareSerial mySerial(8, 9); 

void setup(){
  Serial.begin(9600);   
  mySerial.begin(9600);   
  delay(1000);   
  

  //with this, I can see response in serial monitor. 
  //I want to take the response into a String variable
  mySerial.write("AT+CSQ\r");   
}


void loop(){

  if (mySerial.available()){        
    Serial.write(mySerial.read());  
  
  } 
  
  if (Serial.available()){       
    while(Serial.available()) {    
      mySerial.write(Serial.read());  
    } 
    mySerial.println(); 
  }

}

Thank you very much.

2 
  if (mySerial.available()){       
    Serial.write(mySerial.read()); 
 
  }

If there is a response, do nothing more than read and print the response.

Saving the response in an array, and resetting the array index at the appropriate time, seems far more useful to me.