Master Arduino code for bluetooth and gyroscope

master.ino

#include <Wire.h>
#include <MPU6050.h>
#include <Servo.h>
//---------------------
int Pot = A1;
int value;
//---------------------------

Servo myservo;  // create servo object to control a servo
MPU6050 mpu;
float timeStep = 0.01;
float yaw = 0;
int pos = 0;    // variable to store the servo position
void setup() {
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object
  Serial.begin(9600);
 while(!mpu.begin(MPU6050_SCALE_2000DPS, MPU6050_RANGE_2G))
  {
    Serial.println("Could not find a valid MPU6050 sensor, check wiring!");
    delay(500);
  }
  // Calibrate gyroscope. The calibration must be at rest.
  // If you don't want calibrate, comment this line.
  mpu.calibrateGyro();
  // Set threshold sensivty. Default 3.
  // If you don't want use threshold, comment this line or set 0.
  mpu.setThreshold(5); 
//  pinMode(A0 , INPUT);

}
int hamoksha=0;
void loop()
{
  Vector norm = mpu.readNormalizeGyro();
  yaw = yaw + norm.ZAxis *timeStep;

  hamoksha=map(yaw,-80,80,0,180);
  hamoksha=constrain(hamoksha,0,180);
  myservo.write(hamoksha);
 //----------------------------------
  value = analogRead(Pot);
  value=map(value,0,1023,0,255);
  //---------------------------
   Serial.write('a');
  delay(100);
  Serial.write(value);
   Serial.write('a');
  delay(100);
  Serial.write(hamoksha);
  
  
}