hacknyu2019-arduino-turnstile

hacknyu2019-arduino-turnstile.ino

// Chris Woodle, HackNYU2019
// Send an 'S' to toggle a servo open and closed
// Refrences:
// https://www.arduino.cc/en/tutorial/sweep
// https://www.arduino.cc/en/serial/read

const char SIGNAL = 'S';

#include <Servo.h>

Servo myservo;  // create servo object to control a servo

void setup() {
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object
  myservo.write(0); // Set to 0 position
  myservo.detach(); // disable servo
  Serial.begin(9600);     // opens serial port, sets data rate to 9600 bps
}

void openTurnstile() {
  myservo.attach(9);
  int pos = 0;    // variable to store the servo position
  for (pos = 0; pos <= 90; pos += 1) { // goes from 0 degrees to 180 degrees
    // in steps of 1 degree
    myservo.write(pos);              // tell servo to go to position in variable 'pos'
    delay(15);                       // waits 15ms for the servo to reach the position
  }
  for (pos = 90; pos >= 0; pos -= 1) { // goes from 180 degrees to 0 degrees
    myservo.write(pos);              // tell servo to go to position in variable 'pos'
    delay(15);                       // waits 15ms for the servo to reach the position
  }
  myservo.detach();
}

void loop() {
  // send data only when you receive data:
  if (Serial.available() > 0) {
    int incomingByte = Serial.read(); // read the incoming byte:

    Serial.print("Recieved: ");
    Serial.println(incomingByte, DEC);
    if (incomingByte == SIGNAL) {
      openTurnstile();
    }
  }
}