#include <GSM.h>

// PIN Number
#define PINNUMBER
GSMScanner scannerNetworks;
// initialize the library instance

GSM gsmAccess;     // include a 'true' parameter to enable debugging



GSMModem modemTest;

// Save data variables

String IMEI = "";

// serial monitor result messages

String errortext = "ERROR";

void setup() {

  // initialize serial communications and wait for port to open:

  Serial.begin(9600);

  while (!Serial) {

    ; // wait for serial port to connect. Needed for Leonardo only

  }

  Serial.println("GSM networks scanner");

  scannerNetworks.begin();

  // connection state

  bool notConnected = true;

  // Start GSM shield

  // If your SIM has PIN, pass it as a parameter of begin() in quotes

  while (notConnected) {

    if (gsmAccess.begin(PINNUMBER) == GSM_READY) {

      notConnected = false;

    } else {

      Serial.println("Not connected");

      delay(1000);

    }

  }

  // get modem parameters

  // IMEI, modem unique identifier

  Serial.print("Modem IMEI: ");

  IMEI = modemTest.getIMEI();

  IMEI.replace("\n", "");

  if (IMEI != NULL) {

    Serial.println(IMEI);

  }
}

void loop() {

  // scan for existing networks, displays a list of networks

  Serial.println("Scanning available networks. May take some seconds.");

  Serial.println(scannerNetworks.readNetworks());

  // currently connected carrier

  Serial.print("Current carrier: ");

  Serial.println(scannerNetworks.getCurrentCarrier());

  // returns strength and ber

  // signal strength in 0-31 scale. 31 means power > 51dBm

  // BER is the Bit Error Rate. 0-7 scale. 99=not detectable

  Serial.print("Signal Strength: ");

  Serial.print(scannerNetworks.getSignalStrength());

  Serial.println(" [0-31]");
int isAccessAlive();
Serial.println(gsmAccess.isAccessAlive());
if (!gsmAccess.isAccessAlive())
    Serial.println(F("gsm access is down!"));
  //if (!(gprs.status() == GPRS_READY))
    //Serial.println(F("gprs status is not ready!"));
}