/*Interface a servo motor with NodeMCU to rotate it from 0 degree to 45 degree and to 90 
degree and then back to 0 degree.*/
#include <Servo.h>
int x;
Servo myservo;

void setup() {
pinMode(27, INPUT);
myservo.attach(25); 

myservo.write(0);

delay(2000);

}

void loop() {
x=analogRead(27);
if((x>2000) && (x<3000))
{
myservo.write(45);

delay(1000);
}
if((x>3000) && (x<4000))
{
myservo.write(90);

delay(1000);
}
if(x<2000)
{

myservo.write(0);

delay(1000);
}

}