RN2903 Lora module with arduino uno : only getting join request data not getting

when we are sending data we are only getting uplink not data

 #include <SoftwareSerial.h>         // Include the SoftwareSerial Library 
    SoftwareSerial mySerial(10,11);   // RX, TX ( Creates a new SoftwareSerial object )
    char store_data;     
    int led_test = 13;
    void setup() {
      Serial.begin(115200);
      mySerial.begin(115200);

      pinMode(led_test,OUTPUT);
      digitalWrite(led_test,HIGH);
      delay(500);
      digitalWrite(led_test,LOW);
    }

    void loop() {
      serialFlush();
          Serial.print("loop");
          Serial.println();
          senddata();    
     }

void senddata(){
                modulesetup();
                delay(100);

                String finsend ="30";
               const String finalpush="mac tx cnf 15 "+finsend;
                mySerial.readStringUntil('\n');  
    }

    void serialFlush(){
      while(mySerial.available() > 0) {
        char t = mySerial.read();
         delay(20);
      }
      while(Serial.available() > 0) {
        char n = Serial.read();
         delay(20);
      }
    } 

      int modulesetup(){

                  mySerial.println("radio set sf sf12");
                  mySerial.readStringUntil('\n');  
                  delay(100);

                mySerial.println("mac set deveui xxxxxxxxxxxx");
                mySerial.readStringUntil('\n');  

                mySerial.println("mac set appskey xxxxxxxxxxxxxx");
                mySerial.readStringUntil('\n');


                mySerial.println("mac set devaddr xxxxxxx");
                mySerial.readStringUntil('\n');  

                mySerial.println("mac set nwkskey XXXXXXXXXXX");
                 mySerial.readStringUntil('\n');  

                mySerial.println("mac set retx 4");
                mySerial.readStringUntil('\n');  

                mySerial.println("mac join abp");
                mySerial.readStringUntil('\n');  
     }
  1. Do not initialize the module for every transmission,
  2. Your code is not sending the transmit command to the module so you should not receive anything at all.
  3. DO NOT USE SF12. You are wasting airtime.
  4. Do not use confirmed transmissions. You are only allowed 10 ACKs a day!

Take a look at the existing rn2483/rn2903 libraries to see how to do things correctly.