#include <Servo.h>

Servo ESC;  // create ESC object to control a servo
// twelve servo objects can be created on most boards

int PulseRate = 1200;    // variable to store the BLDC pulse rate.
void setup() {
  ESC.attach(PIN_PA3, 1000, 2000);  // attach Signal pin to arduino pin 6, set minimum pulse width and maximyum pulse width in microseconds). 
}

void loop() {
  
  if(Serial.available()){
     PulseRate = Serial.read();
     ESC.write(PulseRate);              // tell servo to go to position in variable 'pos'
    delay(500);                       // waits 1s
  }
}