Four Steps to writing an Arduino Program Step 3

four_steps_arduino_program_template_step_3.ino

#include <Servo.h>

/*
 *Title: My Awesome Arduino Program
 *Author: Liz Miller
 *Date: 02/15/2018
 *Version: v1.0
 *Purpose: This code shows you how to write an Arduino Program!
 */

//STEP 2 - define all of your IO
const int led = 6;
const int ping = 5;

Servo myServo;

void setup() {
  // put your setup code here, to run once:
  myServo.attach(3); //servo on pin 3
  pinMode(led, OUTPUT);
  pinMode(ping, INPUT);
  Serial.begin(9600); //to initialize the serial monitor
  myServo.write(0); //initialize servo to position 0
  delay(15);
}

//turns the given LED on
void ledOn(const int led){
  digitalWrite(led, HIGH);
}

//moves the servo 180 degrees
void moveServo(){
  myServo.write(180); //move servo to opposite side (180-deg)
  delay(50); //delay to give servo enough time to reach the position
}

/*
 * detect distance from ping sensor
 * Set PING to OUTPUT and pulse for 2 microseconds
 * Send LOW, HIGH, LOW signal
 * Set PING as INPUT and read the signal
 */
int detectDistance(){
  int dur, inches;
  
  // send out a signal
  pinMode(ping, OUTPUT);
  digitalWrite(ping, LOW);
  delayMicroseconds(2);
  digitalWrite(ping, HIGH);
  delayMicroseconds(2);
  digitalWrite(ping, LOW);
  delayMicroseconds(2);
  
  //read the signal as a pulse
  pinMode(ping, INPUT);
  dur = pulseIn(ping, HIGH);
  
  //translate duration as a distance in inches
  inches = dur/74/2; //74 microseconds per inch (account only for the return, divide by 2);
  
  return inches; //return the distance as an integer
}
  

void loop() {
  // put your main code here, to run repeatedly:

}