L'ido pour les pièces de monnaie

// Erik Moran 
// IoT for Coins
//
// PINout
// pin 3 - Coin 
//
// pin 6 - GLCD
// pin 7 - GLCD
// pin 8 - GLCD
// pin 9 - GLCD
// pin 10 - GLCD
//
// pin 2 - r
// pin 1 - g
// pin 0 - b
//
// pin 5 - Locker
//
// pin 4 - Chip slct
// pin 10 - mosi /SD
// pin 8 - miso /SD
// pin 9 -sck /SD
//
// pin A1- Random seed.
//
// pin A0 - Buzzer-Sound
//

#include <SD.h>
#include <SPI.h>
#include <AudioZero.h>
#include <WiFi101.h>
#include "ST7565.h"

// Internet password
char ssid[] = "Network Name";     //  your network SSID (name) 
char pass[] = "Password";    // your network password
int keyIndex = 0;                 // your network key Index number (needed only for WEP)

int status = WL_IDLE_STATUS;
WiFiServer server(80);
String IP;

// Coin Acceptor
const int CoinPin = 3;     // the number of the pushbutton pin
int cash = 0;
int t = 0;

//Graphic Liquid Cristal display - GLCD
ST7565 glcd(10, 9, 8, 7, 6);
char Val[5]; 

unsigned long duration;

// variables will change:
int buttonState = 0;         // variable for reading the pushbutton status
int buttonState1 = 0;   

int vx;//variable x
int vy;//resultado
int vc;//constante
int vl;//A
int re;//respuesta del usuario
int st = 0;
//2 1 0 pines r g b
int pr = 2;
int pg = 1;
int pb = 0;

int locker = 5;

void setup() {
  Serial.begin(9600);
  
  pinMode(CoinPin, INPUT);

// GLCD background color
  pinMode(pr, OUTPUT);
  pinMode(pg, OUTPUT);
  pinMode(pb, OUTPUT);

  digitalWrite(pr, LOW);
  digitalWrite(pg, LOW);
  digitalWrite(pb, LOW);

  pinMode(locker, OUTPUT); //locker

  glcd.begin(0x18);
  //pon algo de IOT
  // delay(2000);
  glcd.clear(); 

  if (WiFi.status() == WL_NO_SHIELD) {
    Serial.println("WiFi shield not present");
    while (true);       // don't continue
  }

  // attempt to connect to Wifi network:
  while ( status != WL_CONNECTED) {
    Serial.print("Attempting to connect to Network named: ");
    Serial.println(ssid);                   // print the network name (SSID);

    // Connect to WPA/WPA2 network. Change this line if using open or WEP network:
    status = WiFi.begin(ssid, pass);
    // wait 10 seconds for connection:
    delay(10000);
  }
  server.begin();                           // start the web server on port 80
  printWifiStatus();                        // you're connected now, so print out the status

  randomSeed(analogRead(1));
  genera_ec();//inicializa pw
}

void loop() {

// Read the pulse for coin
  duration = pulseIn(CoinPin, HIGH);
  if(duration > 0){
    cash++;
    }else {
        if (t != cash) {
          Serial.println(cash);
            t = cash;
        }
    }

  sprintf(Val, "%d", cash);

  char IPc[24];
  IP.toCharArray(IPc, 24);

  glcd.drawstring(0, 0, IPc);
  glcd.drawstring(0, 1, "IOT for Coins");
  glcd.drawstring(0, 2, "You have:");
  glcd.drawstring(0, 3, Val);
  glcd.display();
  //delay(2000);
  glcd.clear();
 
 // Serial.println(duration);

  WiFiClient client = server.available();   // listen for incoming clients

  if (client) {                             // if you get a client,
    Serial.println("new client");           // print a message out the serial port
    String currentLine = "";                // make a String to hold incoming data from the client
    while (client.connected()) {            // loop while the client's connected
      if (client.available()) {             // if there's bytes to read from the client,
        char c = client.read();             // read a byte, then
        Serial.write(c);                    // print it out the serial monitor
        if (c == '\n') {                    // if the byte is a newline character

          // if the current line is blank, you got two newline characters in a row.
          // that's the end of the client HTTP request, so send a response:
          if (currentLine.length() == 0) {
            // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
            // and a content-type so the client knows what's coming, then a blank line:
            client.println("HTTP/1.1 200 OK");
            client.println("Content-type:text/html");
            client.println();
            
            client.print("<link rel=\"shortcut icon\" href=\"http://www.example.com/my_empty_resource\" />");
            client.print("<script src=\"//code.jquery.com/jquery-1.12.0.min.js\"></script>");
            client.print("<style>body {text-align: center; font-size: 18px; color: #333; text-shadow: 0px 0px 3px #ccc; font-family: Verdana;}</style>");

            client.print("Current cash:<br>");
            client.print(cash);

            client.print("<br\/><br\/>");
            if(vx != 1) client.print(vl);
            client.print("x");//vx
            if(vc < 0) {
              client.print("");
            } else {
              client.print(" + ");
            }
            client.print(vc);
            client.print(" = ");
            client.print(vy);
            client.print("<br\/>x = <input type='text' id='respuesta' value=''\/>");
            client.print("<input type='button' id='enviar' value='enviar'/>");

            /*
            client.print("<script>$(\"#respuesta\").keyup(function (e) {if (e.keyCode == 13) {window.location='http://'+self.location.hostname+'/'+String.fromCharCode(parseInt($(\"#respuesta\").val())+65);}});</script>");
            client.print("<script>$(\"#enviar\").click(function (e) {window.location='http://'self.location.hostname+'/'+String.fromCharCode(parseInt($(\"#respuesta\").val())+65);});</script>");
            */
            client.print("<script>$(\"#respuesta\").keyup(function (e) {if (e.keyCode == 13) {window.location='http://'+self.location.hostname+'/'+(parseInt($(\"#respuesta\").val())+65);}});</script>");
            client.print("<script>$(\"#enviar\").click(function (e) {window.location='http://'self.location.hostname+'/'+(parseInt($(\"#respuesta\").val())+65);});</script>");
            client.print("<script>$(\"#respuesta\").focus();</script>");

            // The HTTP response ends with another blank line:
            client.println();
            digitalWrite(pg, LOW);
            digitalWrite(locker, LOW);//abre locker
            // break out of the while loop:
            break;//!!!
          }
          else {      // if you got a newline, then clear currentLine:
            currentLine = "";
          }
        }
        else if (c != '\r') {    // if you got anything else but a carriage return character,
          currentLine += c;      // add it to the end of the currentLine
        }

        // Check to see if the client request was correct or wrong.
        if (currentLine.endsWith("GET /HH")) {
          digitalWrite(locker, HIGH);            
        }
        if (currentLine.endsWith("GET /LL")) {
          digitalWrite(locker, LOW);            
        }
        if (currentLine.endsWith("GET /"+String(vx+65))) {
        //if (currentLine.endsWith("GET /"+int(vx))) {
            st = 1;
            genera_ec();
            digitalWrite(pg, HIGH);
            digitalWrite(locker, HIGH);//abre locker
          }
          if (currentLine.endsWith("GET /NN")) {
            st = 1;
            genera_ec();
          }
          if (currentLine.endsWith("GET /RR")) {
            client.print("<br\/>*<br\/>");
            client.print(vx);
            client.print("<br\/>*<br\/>");
            client.print(String(vx+65));
            client.println();
            
            //digitalWrite(pg, HIGH);
            //digitalWrite(locker, HIGH);//abre locker
          }
      }
    }
    // close the connection:
    client.stop();
    Serial.println("client disonnected");
  }
 
}


String DisplayAddress(IPAddress address)
{
 return String(address[0]) + "." + 
        String(address[1]) + "." + 
        String(address[2]) + "." + 
        String(address[3]);
}

void printWifiStatus() {
  // print the SSID of the network you're attached to:
  Serial.print("SSID: ");
  Serial.println(WiFi.SSID());

  // print your WiFi shield's IP address:
  IPAddress ip = WiFi.localIP();
  Serial.print("IP Address: ");
  Serial.println(ip);
  IP = DisplayAddress(ip);

  // print the received signal strength:
  long rssi = WiFi.RSSI();
  Serial.print("signal strength (RSSI):");
  Serial.print(rssi);
  Serial.println(" dBm");
  // print where to go in a browser:
  Serial.print("To see this page in action, open a browser to http://");
  Serial.println(ip);
}



void genera_ec() {
  vx = random(0, 9);
  vc = random(-20, 20);
  vl = random(1,5);
  vy = (vl*vx)+vc;
  re = 0;
}