/**************************************************************
 *
 * This sketch connects to a website and downloads a page.
 * It can be used to perform HTTP/RESTful API calls.
 *
 * TinyGSM Getting Started guide:
 *   https://tiny.cc/tinygsm-readme
 *
 **************************************************************/

// Select your modem:
#define TINY_GSM_MODEM_SIM800
// #define TINY_GSM_MODEM_SIM900
// #define TINY_GSM_MODEM_SIM808
// #define TINY_GSM_MODEM_SIM868
// #define TINY_GSM_MODEM_SIM7000
// #define TINY_GSM_MODEM_UBLOX
// #define TINY_GSM_MODEM_M95
// #define TINY_GSM_MODEM_BG96
// #define TINY_GSM_MODEM_A6
// #define TINY_GSM_MODEM_A7
// #define TINY_GSM_MODEM_M590
// #define TINY_GSM_MODEM_MC60
// #define TINY_GSM_MODEM_MC60E
// #define TINY_GSM_MODEM_ESP8266
// #define TINY_GSM_MODEM_XBEE

// Increase RX buffer if needed
//#define TINY_GSM_RX_BUFFER 512

// See the debugging, if wanted
//#define TINY_GSM_DEBUG Serial
//#define LOGGING

// Add a reception delay, if needed
//#define TINY_GSM_YIELD() { delay(1); }

#include <TinyGsmClient.h>

// Uncomment this if you want to see all AT commands
//#define DUMP_AT_COMMANDS

// Uncomment this if you want to use SSL
//#define USE_SSL

// Set serial for debug console (to the Serial Monitor, default speed 115200)
#define SerialMon Serial

// Use Hardware Serial on Mega, Leonardo, Micro
#define SerialAT Serial1

// or Software Serial on Uno, Nano
//#include <SoftwareSerial.h>
//SoftwareSerial SerialAT(2, 3); // RX, TX


// Your GPRS credentials
// Leave empty, if missing user or pass
const char apn[]  = "YourAPN";
const char gprsUser[] = "";
const char gprsPass[] = "";
const char wifiSSID[]  = "YourSSID";
const char wifiPass[] = "SSIDpw";

// Server details
const char server[] = "vsh.pp.ua";
const char resource[] = "/TinyGSM/logo.txt";

#ifdef DUMP_AT_COMMANDS
  #include <StreamDebugger.h>
  StreamDebugger debugger(SerialAT, SerialMon);
  TinyGsm modem(debugger);
#else
  TinyGsm modem(SerialAT);
#endif

#ifdef USE_SSL
  TinyGsmClientSecure client(modem);
  const int  port = 443;
#else
  TinyGsmClient client(modem);
  const int  port = 80;
#endif

void setup() {
  // Set console baud rate
  SerialMon.begin(115200);
  delay(10);
  SerialMon.println(F("Wait..."));

  pinMode(23, OUTPUT);
  digitalWrite(23, LOW);

  // Set GSM module baud rate
  SerialAT.begin(9600);
  delay(3000);

  // Restart takes quite some time
  // To skip it, call init() instead of restart()
  SerialMon.println(F("Initializing modem..."));
  modem.restart();

  String modemInfo = modem.getModemInfo();
  SerialMon.print(F("Modem: "));
  SerialMon.println(modemInfo);

  // Unlock your SIM card with a PIN
  //modem.simUnlock("1234");
}

void loop() {

  if (modem.hasWifi()) {
    SerialMon.print(F("Setting SSID/password..."));
    if (!modem.networkConnect(wifiSSID, wifiPass)) {
      SerialMon.println(" fail");
      delay(10000);
      return;
    }
    SerialMon.println(" OK");
  }
  else if (modem.getModemName().indexOf("XBee") >= 0) {
    SerialMon.print(F("Setting APN"));
    if (!modem.gprsConnect(apn)) {
      SerialMon.println(" fail");
      delay(10000);
      return;
    }
    SerialMon.println(" OK");
  }

  SerialMon.print(F("Waiting for network..."));
  if (!modem.waitForNetwork()) {
    SerialMon.println(" fail");
    delay(10000);
    return;
  }
  SerialMon.println(" OK");

  if (modem.hasGPRS()) {
    SerialMon.print(F("Connecting to "));
    SerialMon.print(apn);
    if (!modem.gprsConnect(apn, gprsUser, gprsPass)) {
      SerialMon.println(" fail");
      delay(10000);
      return;
    }
    SerialMon.println(" OK");
  }

  SerialMon.print(F("Connecting to "));
  SerialMon.print(server);
  if (!client.connect(server, port)) {
    SerialMon.println(" fail");
    delay(10000);
    return;
  }
  SerialMon.println(" OK");

  // Make a HTTP GET request:
  client.print(String("GET ") + resource + " HTTP/1.0\r\n");
  client.print(String("Host: ") + server + "\r\n");
  client.print("Connection: close\r\n\r\n");

  unsigned long timeout = millis();
  while (client.connected() && millis() - timeout < 10000L) {
    // Print available data
    while (client.available()) {
      char c = client.read();
      SerialMon.print(c);
      timeout = millis();
    }
  }
  SerialMon.println();

  // Shutdown

  client.stop();
  SerialMon.println(F("Server disconnected"));

  if (modem.hasWifi()) {
    modem.networkDisconnect();
    SerialMon.println(F("WiFi disconnected"));
  }
  else {
    modem.gprsDisconnect();
    SerialMon.println(F("GPRS disconnected"));
  }

  // Do nothing forevermore
  while (true) {
    delay(1000);
  }
}