void setup()  
{
  Serial.begin(115200);
  delay(5000);
  Serial.println("\n$PING 200");
  Serial.println("$P:Dg21;^{-%90,90gn2}{I7.55~1%10;}");
}


void loop() 
{
  static float x = 0;
  static float y = 0;
  static float dx = 0.17/1.3/2;
  static float dy = 0.213/1.3/2;

  static float CBall = 0;
  
  Serial.print("#C0:s~1:@");
  Serial.print(x+5,1);
  Serial.print(",");
  Serial.print(y,1);
  Serial.println("");
 
  if ((x+dx > 80) || (x+dx < 0)) { dx=-dx;}
  if ((y+dy > 80) || (y+dy < 0)) { dy=-dy;}
  
  x += dx;
  y += dy;
    
  delay(2);
}

NOTE: Remember to check (on your miuPanel App) that the baud-rate of your wifi module is the same set in this code.