wanna Merge two codes (Sim908+RfID)

want to Merge this codes to send sms to my mobile have a RFID TAG Number
First Code for Sending msg to mobile

int8_t answer;
int onModulePin= 13;
char aux_string[30];
char phone_number[]="000000652";

void setup(){

    pinMode(onModulePin, OUTPUT);
    Serial.begin(115200);    
        
    Serial.println("Starting...");
    power_on();
    
    delay(3000);
    
    // sets the PIN code
    sendATcommand("AT+CPIN=****", "OK", 2000);
    
    delay(3000);
    
    Serial.println("Connecting to the network...");

    while( (sendATcommand("AT+CREG?", "+CREG: 0,1", 500) || 
            sendATcommand("AT+CREG?", "+CREG: 0,5", 500)) == 0 );

    Serial.print("Setting SMS mode...");
    sendATcommand("AT+CMGF=1", "OK", 1000);    // sets the SMS mode to text
    Serial.println("Sending SMS");
    
    sprintf(aux_string,"AT+CMGS=\"%s\"", phone_number);
    answer = sendATcommand(aux_string, ">", 2000);    // send the SMS number
    if (answer == 1)
    {
        Serial.println("Test-Arduino-Hello World");
        Serial.write(0x1A);
        answer = sendATcommand("", "OK", 20000);
        if (answer == 1)
        {
            Serial.print("Sent ");    
        }
        else
        {
            Serial.print("error ");
        }
    }
    else
    {
        Serial.print("error ");
        Serial.println(answer, DEC);
    }

}


void loop(){

}

void power_on(){

    uint8_t answer=0;
    
    // checks if the module is started
    answer = sendATcommand("AT", "OK", 2000);
    if (answer == 0)
    {
        // power on pulse
        digitalWrite(onModulePin,HIGH);
        delay(3000);
        digitalWrite(onModulePin,LOW);
    
        // waits for an answer from the module
        while(answer == 0){     // Send AT every two seconds and wait for the answer
            answer = sendATcommand("AT", "OK", 2000);    
        }
    }
    
}

int8_t sendATcommand(char* ATcommand, char* expected_answer, unsigned int timeout){

    uint8_t x=0,  answer=0;
    char response[100];
    unsigned long previous;

    memset(response, '\0', 100);    // Initialice the string
    
    delay(100);
    
    while( Serial.available() > 0) Serial.read();    // Clean the input buffer
    
    Serial.println(ATcommand);    // Send the AT command 


    x = 0;
    previous = millis();

    // this loop waits for the answer
    do{
        // if there are data in the UART input buffer, reads it and checks for the asnwer
        if(Serial.available() != 0){    
            response[x] = Serial.read();
            x++;
            // check if the desired answer is in the response of the module
            if (strstr(response, expected_answer) != NULL)    
            {
                answer = 1;
            }
        }
    // Waits for the asnwer with time out
    }while((answer == 0) && ((millis() - previous) < timeout));    

    return answer;
}

Second code for Reading RFID Tag

#include<SoftwareSerial.h>
#define RFIDEnablePin 2 
#define RFIDSerialRate 2400
#define RxPin 5
#define TxPin 4 
SoftwareSerial RFIDReader(RxPin , TxPin);
String RFIDTAG="";
String DispalyTAG="";
 


void setup() {

  RFIDReader.begin(RFIDSerialRate);
  pinMode(RFIDEnablePin,OUTPUT);
  digitalWrite(RFIDEnablePin,LOW);
  Serial.begin(9600);
  Serial.println("Please Scan Card");
}

void loop() {
  // put your main code here, to run repeatedly:
  if(RFIDReader.available() > 0)
  {
    ReadSerial(RFIDTAG);
  }
  if(DispalyTAG!=RFIDTAG)
  {
    DispalyTAG=RFIDTAG;
    Serial.println(RFIDTAG);
 
  }
}
void ReadSerial(String &ReadTagString)
{
  int bytesread=0;
  int val=0;
  char code[10];
  String TagCode="";
  if (RFIDReader.available()>0)
  {
    if((val = RFIDReader.read()) == 10)
    {
      bytesread=0;
      while(bytesread<10)
      {
        if( RFIDReader.available() > 0)
        {
          val = RFIDReader.read();
          if((val == 10)||(val == 13)){
            break;
          }
          code[bytesread]=val;
          bytesread++;
        }
      }
      if(bytesread==10){
        for(int x=0; x<10; x++)
        {
          TagCode+=code[x];
        }
        ReadTagString = TagCode;
        while(RFIDReader.available() > 0)
        {
          RFIDReader.read();
        }
      }
      bytesread=0;
      TagCode="";
    }
  }
}