/*
 * Lesson 75: Using Solid State Relay with Arduino
 * 
 * This is the Arduino code for an Infrared Obstacle Avoidance module
 
 * Written by Ahmad Shamshiri for Robojax.com 
 * on January 15, 2019 at 20:45 in Ajax, Ontario, Canada


  Watch instruction video for this code: https://youtu.be/DumIZ3lkHP4
  
  This video is part of the Arduino Step by Step Course, which starts here: https://youtu.be/-6qSrDUA5a8

 

If you found this tutorial helpful, please support me so I can continue creating 
content like this. 

or make a donation using PayPal http://robojax.com/L/?id=64
  
 * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact. * 
 * This code has been downloaded from Robojax.com
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
int signalPin = 8;
 
void setup() {
 Serial.begin(9600);
 pinMode(signalPin, INPUT);// set signalPin as input

}

void loop() {
  // Written for Robojax on December 28, 2017
  int detect = digitalRead(signalPin);// read obstacle status and store it into "detect"
  if(detect == LOW){
    
   Serial.println("Obstacle on the way"); 
  }else{
    
   Serial.println("All clear");  
  }
  delay(300);
}