Receiving Data from RN42 Bluetooth Module

I have a problem senting my codes to my zumo bot. I have attached a RN42 to arduino uno board and the board is connected to a zumo shield which has two motors. When i sent the code the arduino uno is not receiving any data. is there any codes i need to add in order to receive the codes from my bluetooth module?

//online resources and library :
#include <QTRSensors.h>
#include <ZumoReflectanceSensorArray.h>
#include <ZumoMotors.h>
#define LED_PIN 13


// Change record
// Change second left turn (m= 2) to go forward before left turn.

ZumoMotors motors;
ZumoReflectanceSensorArray reflectanceSensors;
// Define an array for holding sensor values.
#define NUM_SENSORS 6
unsigned int sensorValues[NUM_SENSORS];
int proportional= 0;
int integral=0;
int last_proportional=0;
int derivative=0;
float K1, K2, K3;
float error_value;
int m = 0;
int s;
int wait = 2500; // Standard junction wait time




void setup()
{
  s= 70;
  reflectanceSensors.init();
 digitalWrite(2, LOW);
 
  

  delay(500);
  pinMode(13, OUTPUT);
  digitalWrite(13, HIGH);        // turn on LED to indicate we are in calibration mode
  
  unsigned long startTime = millis();
  while(millis() - startTime < 10000)   // make the calibration take 10 seconds
  {
    reflectanceSensors.calibrate();
  }
  digitalWrite(13, LOW);         // turn off LED to indicate we are through with calibration

  // print the calibration minimum values measured when emitters were on
  Serial.begin(9600);
  for (byte i = 0; i < NUM_SENSORS; i++)
  {
    Serial.print(reflectanceSensors.calibratedMinimumOn[i]);
    Serial.print(' ');
  }
  Serial.println();
  
  // print the calibration maximum values measured when emitters were on
  for (byte i = 0; i < NUM_SENSORS; i++)
  {
    Serial.print(reflectanceSensors.calibratedMaximumOn[i]);
    Serial.print(' ');
  }
  Serial.println();
  Serial.println();
  delay(1000);
}

void sensor()
{
  // read calibrated sensor values and obtain a measure of the line position.
  // Note: the values returned will be incorrect if the sensors have not been properly
  // calibrated during the calibration phase.
  unsigned int position = reflectanceSensors.readLine(sensorValues);

  // To get raw sensor values instead, call:  
  //reflectanceSensors.read(sensorValues);

  for (byte i = 0; i < NUM_SENSORS; i++)
  {
    Serial.print(sensorValues[i]);
    Serial.print(' ');
  }
  Serial.print("    ");
  Serial.println(position);
  
  delay(250);
}
















//code down by Song Hui. PID CONTROL

void turn() {
  unsigned int position = reflectanceSensors.readLine(sensorValues);
  float K1 = 0.1;
  float K2 = 0;
  float K3 = 0;
  proportional = position - 2450;
  integral = integral + proportional;
  derivative = proportional - last_proportional;
  last_proportional = proportional;
  error_value = proportional* K1 + integral * K2 + derivative *K3;
  Serial.print(' ');
  Serial.print(proportional);
  Serial.print(' ');
  Serial.print(integral);
  Serial.print(' ');
  Serial.print(derivative);
  Serial.print(' ');
  Serial.print(error_value);
  Serial.print(' ');
  
  if (error_value < - s) {
    error_value = -s;
  }
  if (error_value > s) {
    error_value = s;
  }
  if (error_value <0 ) {
    motors.setRightSpeed(-s +error_value );
    motors.setLeftSpeed(-s -error_value );
  }
  else {
    motors.setRightSpeed(-s +error_value);
    motors.setLeftSpeed(-s - error_value);
  }
}








//what should the car do when it meets the junctions and how it gonna remember it

void loop(){

  unsigned int position = reflectanceSensors.readLine(sensorValues);
//  ****************  Comment out the first Y junction, to place the car after it
//    if (sensorValues[0] > 50 and sensorValues[5] < 50 and m==0){  
//    motors.setRightSpeed(0);
//    motors.setLeftSpeed(0);
//    delay(wait);
//    
//    motors.setRightSpeed(-s);
//    motors.setLeftSpeed(-s);
//    delay(1200);
//    m=m+1;
//   
//    turn();
//  }
// *******************************************************************

  if (sensorValues[0] > 50 and sensorValues[5] < 50 and m==0){  
    motors.setRightSpeed(0);
    motors.setLeftSpeed(0);
    delay(wait);

// ************** Insert move forward to clear the grass patch on left, with a more aggressive turn

    motors.setRightSpeed(-s);
    motors.setLeftSpeed(-s);
    delay(700);

// ****************    

    motors.setRightSpeed(-180); // change from -130
    motors.setLeftSpeed(80);
    delay(600);
   
    motors.setRightSpeed(-50);
    motors.setLeftSpeed(-50);
    delay(2000);
    
    motors.setRightSpeed(-50);
    motors.setLeftSpeed(30);
    delay(450);

    m=m+1;

    turn();
  }

  if (sensorValues[0] > 50 and sensorValues[5] > 50 and m==1){
    motors.setRightSpeed(0);
    motors.setLeftSpeed(0);
    delay(wait);
    
    motors.setRightSpeed(-s);
    motors.setLeftSpeed(-s);
    delay(1200);
    m=m+1;
    
    turn();
  }

  if (sensorValues[0] > 50 and sensorValues[5] > 50 and m==2){  
    motors.setRightSpeed(0);
    motors.setLeftSpeed(0);
    delay(wait);

    // *********** Change in Rev 2 to move forward x msec before turning ***************
    
    motors.setRightSpeed(-s);
    motors.setLeftSpeed(-s);
    delay(1200);
    // **********************************************************************************
    
    motors.setRightSpeed(-200); // change from -130
    motors.setLeftSpeed(100);
    delay(1000);
    
    motors.setRightSpeed(-50);
    motors.setLeftSpeed(30);
    delay(1200);
    
    motors.setRightSpeed(-50);
    motors.setLeftSpeed(-50);
    delay(500);

    m=m+1;

    turn();
  }

  if (sensorValues[0] > 50 and sensorValues[5] > 50 and m==3){
    motors.setRightSpeed(0);
    motors.setLeftSpeed(0);
    delay(wait);

  // *********** Change in Rev 2 to move forward 300msec before turning ***************
    
    motors.setRightSpeed(-s);
    motors.setLeftSpeed(-s);
    delay(850);
    
    motors.setLeftSpeed(-150); // change from -130
    motors.setRightSpeed(80);
    delay(2000);
   
   // Added straight
    motors.setRightSpeed(-80);
    motors.setLeftSpeed(-80);
    delay(1500);              // change from 1500
    
    motors.setRightSpeed(20);
    motors.setLeftSpeed(-90);
    delay(1200);

    m=m+1;

    turn();
  }

  if (sensorValues[0] > 50 and sensorValues[5] > 50 and m==4){
    motors.setRightSpeed(0);
    motors.setLeftSpeed(0);
    delay(wait);

    
    motors.setRightSpeed(-s);
    motors.setLeftSpeed(-s);
    delay(1200);
    m=m+1;
    
    turn();
  }

  if (sensorValues[0] > 50 and sensorValues[5] > 50 and m==5){
    motors.setRightSpeed(0);
    motors.setLeftSpeed(0);
    delay(30000);
    m=0;
  
  

 }

  else{
    turn();
  }
  
}

There’s a lot of code there for hardware I and most other do not have so if it’s okay to start from simple…

How many parts have you been able to get to run alone, just to test?

Have you made the sensors alone work? The RN42? The motor shield?
Even if it is the example code for any of those, which have you made work by themselves?

This is troubleshooting 101. If it’s broke then go back to what worked.