#include <SoftwareSerial.h>
#include <Servo.h>

SoftwareSerial BT(10, 11); // RX, TX -> HC-06 TXD to pin 10, RXD to pin 11
Servo fanServo;

const int PIN_SERVO   = 9;
const int ANGLE_REST  = 90;   //TUNE THIS TO  YOUR OWN SWITCHES
const int ANGLE_ON    = 56;   
const int ANGLE_OFF   = 124;  
const int PRESS_DELAY = 400;  

void setup() {
  Serial.begin(9600);
  BT.begin(9600);
  fanServo.attach(PIN_SERVO);
  fanServo.write(ANGLE_REST);
  Serial.println("Ready. Send 1 = ON, 0 = OFF.");
}

void loop() {
  if (BT.available()) {
    char c = BT.read();

    if (c == '1') {
      pressSwitch(ANGLE_ON);
      BT.println("Fan ON");
      Serial.println("Fan ON");
    } 
    else if (c == '0') {
      pressSwitch(ANGLE_OFF);
      BT.println("Fan OFF");
      Serial.println("Fan OFF");
    }

  }
}

void pressSwitch(int angle) {
  fanServo.write(angle);
  delay(PRESS_DELAY);
  fanServo.write(ANGLE_REST);
}