Arduino web server

#include <LiquidCrystal_I2C.h>
#include <Wire.h>
int _GSM_TXPIN_ = 10;
int _GSM_RXPIN_ = 11;
#include "SIM900.h"
#include <SoftwareSerial.h>
#include "inetGSM.h"

LiquidCrystal_I2C lcd(0x27, 20, 4);
InetGSM inet;

int sensor = 52;
int count = 0;
int lastSensorState = 0;
boolean started = false;

void setup() {
  pinMode(sensor, INPUT);
  Serial.begin(9600);
  delay(2000);
  Serial.println("Start LCD");
  lcd.init();
  lcd.backlight();
  lcd.clear();
  lcd.print("Starting...");
  //
  if (gsm.begin(4800)) {
    Serial.println("\nstatus=READY");
    started = true;
  } else Serial.println("\nstatus=IDLE");
  lcd.clear();
  lcd.print("status=READY");
  if (started) {
    //viettel v-internet / mobi m-wap
    if (inet.attachGPRS("m-wap", "mms", "mms")) {
      Serial.println("status=ATTACHED");
      lcd.clear();
      lcd.print("status=ATTACHED");
    }
    else Serial.println("status=ERROR");
    delay(1000);

    //Read IP address.
    gsm.SimpleWriteln("AT+CIFSR");
    count = updateServer();
  }
  updateLCD(count);
}

void loop() {
  int sensorState = digitalRead(sensor);
  if (sensorState != lastSensorState) {
    if (sensorState == HIGH) {
      Serial.println("Sensor on");
      count++;
      updateLCD(count);
      updateServer();
    } else {
      Serial.println("Sensor off");
    }
  }
  lastSensorState = sensorState;
  delay(50);
}

void updateLCD(int count) {
  lcd.clear();
  lcd.print("so nguoi");
  lcd.setCursor(0, 1);
  lcd.print(count);
}

int updateServer() {
  char res[250];
  int numdata = 0;
  numdata = inet.httpPOST("mayruatay.ga", 80, "/update", "", res, 255);
  Serial.println("SENT");
  delay(500);
  //Print the results.
//  Serial.print("Respond length: ");
//  Serial.print(numdata);
//  Serial.print(" | Data received: ");
//  Serial.println(res);
  return atoi(res);
}