BotoneraInalambrica.ino

#include <SPI.h>

// For I2C LCD: https://bitbucket.org/fmalpartida/new-liquidcrystal/overview
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#include <Bridge.h>
#include <BridgeClient.h>
#include <HttpClient.h>

#define LCD_I2C_ADDR 0x3F

const char *arduino_id = "YUN0"; // Variar al momento de carga en cada Arduino
const char *server = "192.168.1.116"; // Modificar al momento de configuracion de red
char buffer[64];

BridgeClient bClient;
HttpClient hClient;
LiquidCrystal_I2C lcd(LCD_I2C_ADDR, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);

byte buttonNum[5] = {3, 4, 5, 6, 7};
byte q = 1, a = 0;


void setup() {
  Serial.begin(9600);
  lcd.begin(20, 4);
  lcd.backlight();
  lcd.home();
  lcd.print("Loading...");

  Bridge.begin();
  lcd.clear();
  lcd.home();
  lcd.print("Bridge ready...");
  delay(750);
  
  for (int x = 0; x < 5; x++)
  {
    pinMode(buttonNum[x], INPUT_PULLUP);
  }
  lcd.clear();
  lcd.home();
  lcd.print("Buttons ready...");
  delay(750);
}

void loop() {
  // Show question
  show_q(q);

  // Wait for an answer
  while (a == 0)
  {
    a = getAnswer();
  }
  Serial.print("Respuesta: ");
  Serial.println(a);
  // Send answer to server
  send_answer(q, a);
  a = 0;
}

// Get and show question in LCD
void show_q(int i)
{
  String url = String(server) + "/proyecto_iot/question.php?id=" + String(id, DEC);
  hClient.get(url);
  String question = "";

  while (hClient.available())
  {
    char c = hClient.read();
    question = question + c;
  }

  lcd.clear();
  lcd.home();
  lcd.print(question);
}

void change_q()
{
  q++;
}

int getAnswer()
{
  if (digitalRead(buttonNum[0]) == LOW)
  {
    while (digitalRead(buttonNum[0]) == LOW)
    {
      delay(10);
    }
    return 1;
  } 
  else if (digitalRead(buttonNum[1]) == LOW)
  {
    while (digitalRead(buttonNum[1]) == LOW)
    {
      delay(10);
    }
    return 2;
  }
  else if (digitalRead(buttonNum[2]) == LOW)
  {
    while (digitalRead(buttonNum[2]) == LOW)
    {
      delay(10);
    }
    return 3;
  }
  else if (digitalRead(buttonNum[3]) == LOW)
  {
    while (digitalRead(buttonNum[3]) == LOW)
    {
      delay(10);
    }
    return 4;
  }
  else if (digitalRead(buttonNum[4]) == LOW)
  {
    while (digitalRead(buttonNum[4]) == LOW)
    {
      delay(10);
    }
    return buttonNum[4];
  }
  else if (digitalRead(buttonNum[5]) == LOW)
  {
    while (digitalRead(buttonNum[5]) == LOW)
    {
      delay(10);
    }
    return 5;
  }
  else
  {
    return 0;
  }
}

// Sends answer to server
void send_answer(int q, int a)
{
  if (bClient.connect(server, 80))
  {
    sprintf(buffer, "POST /proyecto_iot/receiver.php HTTP/1.1");
    bClient.println(buffer);
    sprintf(buffer, "Host: %s", server);
    bClient.println(buffer);
    bClient.println("Content-Type: application/json");
    sprintf(buffer, "{ \"ID\" : \"%s\", \"pregunta\" : \" %i \", \"respuesta\" : \" %i \" }", arduino_id, q, n);
    bClient.print("Content-Length: ");
    bClient.println(strlen(buffer));
    bClient.println();
    bClient.println(buffer);
  } else {
    lcd.clear();
    lcd.home();
    lcd.print("Connection failed");
    delay(2500);
  }
  a++;
}