[Week 7 FYP2] Development of Easy Parking Finder System

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Activity Title :

- Modify the previous code to suit with sensor (code 1).
- Make a status in web-page (code 2)
- Study java script using java editor

Objective :

To show the range on the web-page.
To show the color represent the status of parking

Content :

I modify the previous code to make the code suitable for ultrasonic sensor. 

 Code1: 
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>

 const char* ssid = "abc"; // ssid
const char* password = "123456789";// password
//192.168.43.20
IPAddress ip(192, 168, 43, 23); //set static ip
IPAddress gateway(192, 168, 43, 1); //set getteway
IPAddress subnet(255, 255, 255, 0);//set subnet

 // defines pins numbers
const int trigPin = 5;  //D1
const int echoPin = 4;  //D2

 // defines variables
long duration;
int distance;

 String page = "";
double data; 
ESP8266WebServer server(80);

 void setup() {
  pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
  pinMode(echoPin, INPUT); // Sets the echoPin as an Input
  
  Serial.begin(115200);
  delay(10);
  // Connection to wireless network
  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

   WiFi.config(ip, gateway, subnet);
  WiFi.begin(ssid, password);

   while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
  
  server.begin();
  Serial.println("Server started");

   // Print the IP address in serial monitor. It must be the same we entered above
  Serial.print("Type this address in URL to connect: ");
  Serial.print("http://");
  Serial.println(ip);
  Serial.println("/");
  server.on("/", [](){
    page = "<html>\
  <head>\
    <meta http-equiv='refresh' content='5'/>\
    <title>Parking Status:</title>\
    <style>\
      body { background-color: #ffe63b; font-family: Arial, Helvetica, Sans-Serif; Color: #000088; }\
    </style>\
  </head>\
  <body>\
  </body>\
</html>";

     server.send(200, "text/html", page);
  });

 }

 void loop() {

 // Clears the trigPin
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);

 // Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);

 // Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(echoPin, HIGH);

 // Calculating the distance
distance = duration*0.034/2;
delay(2000);
  data = distance;
  delay(1000);
  server.handleClient();
  delay(1);

 }

 Code2:
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>

 const char* ssid = "abc"; // ssid
const char* password = "123456789";// password
//192.168.43.20
IPAddress ip(192, 168, 43, 23); //set static ip
IPAddress gateway(192, 168, 43, 1); //set getteway
IPAddress subnet(255, 255, 255, 0);//set subnet

 // defines pins numbers
const int trigPin = 5;  //D1
const int echoPin = 4;  //D2
const int ledA = 14; //d5
const int ledB = 12; //d6
// defines variables
long duration;
int distance;

 String page = "";
double data; 
String (stats);
ESP8266WebServer server(80);

 void setup() {
  pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
  pinMode(echoPin, INPUT); // Sets the echoPin as an Input
  pinMode(ledA, OUTPUT);
  pinMode(ledB, OUTPUT);
  
  Serial.begin(115200);
  delay(10);
  // Connection to wireless network
  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

   WiFi.config(ip, gateway, subnet);
  WiFi.begin(ssid, password);

   while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
  
  server.begin();
  Serial.println("Server started");

   // Print the IP address in serial monitor. It must be the same we entered above
  Serial.print("Type this address in URL to connect: ");
  Serial.print("http://");
  Serial.println(ip);
  Serial.println("/");
  server.on("/", [](){
    page = "<html>\
  <head>\
    <meta http-equiv='refresh' content='5'/>\
    <title>Parking Status:</title>\
    <style>\
      body { background-color: #ffe63b; font-family: Arial, Helvetica, Sans-Serif; Color: #000088; }\
    </style>\
  </head>\
  <body>\
  </body>\
</html>";

     server.send(200, "text/html", page);
  });

 }

 void loop() {

 // Clears the trigPin
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);

// Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);


// Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(echoPin, HIGH);

 // Calculating the distance
distance = duration*0.034/2;
delay(2000);

     if(distance >= 15)          
    {

       digitalWrite(ledA, HIGH); // set turn on when more than 15 cm
      digitalWrite(ledB, LOW); // set off when less than 15
      stats = "Not Available";
    }
    
  else if(distance <= 14)          
    {

       digitalWrite(ledB, HIGH); // set off when less than 15
      digitalWrite(ledA, LOW); // set off when less than 15
      stats = "Available";
    }

   data = distance;
  delay(1000);
  server.handleClient();

   delay(1);
}


Result and Analysis:

As a result, the web-page show the reading of ultrasonic sensor and also the background will change to green or red depend on parking availability. 



Conclusion:
As a conclusion, the code is successfully build to make it suit for the sensor. 

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