brushless motors ,esc , quadcopters

Using Arduino Motors, Mechanics, Power and CNC
5

hi tnx for u r help anyway>>> i came out of that easily with my prof advise>>>
he advised me to use the microseconds value for the esc and arm the same >>>
my esc arms at 100ms and has the highest throttle range of 2000ms......
now all is working like charm>>>>\

my next point of interest is using the gsm module and the at commands>>>>
kindly give me essential details

#include <Servo.h>
Servo motor;

void esc() {
  delay(5000);
  Serial.print("Sending lowest throttle");
  motor.writeMicroseconds(1000);
  delay(2000);
  Serial.print("Low throttle sent");
}
void setup() {
  Serial.begin(9600);
  motor.attach(9);
  Serial.print("ESC calibration started"); 
  esc();
  Serial.print("ESC calibration completed");
}

void loop() {
  if (Serial.available()>0) {
    int key = Serial.read();
    switch(key) {
      case '1':
      motor.writeMicroseconds(1250);
      delay(2000);
      break;
      case '2':
      motor.writeMicroseconds(1400);
      delay(2000);
      break;
      case '3':
      motor.writeMicroseconds(1750);
      delay(2000);
      break;
      case '4':
      motor.writeMicroseconds(2000);
      delay(2000);
      break;
      case '5':
      motor.writeMicroseconds(2500);
      delay(2000);
      break;
      default:
      motor.writeMicroseconds(1000);
      break;
    }
  }
}

Tjhis is the code i used for controlling the motor