Band Management

This sketch, for the Arduino GSM shield, checks the band  currently configured in the modem and allows you to change
it.

/*

 Band Management

 This sketch, for the Arduino GSM shield, checks the band

 currently configured in the modem and allows you to change

 it.

 Please check http://www.worldtimezone.com/gsm.html

 Usual configurations:

 Europe, Africa, Middle East: E-GSM(900)+DCS(1800)

 USA, Canada, South America: GSM(850)+PCS(1900)

 Mexico: PCS(1900)

 Brazil: GSM(850)+E-GSM(900)+DCS(1800)+PCS(1900)

 Circuit:

 * GSM shield

 created 12 June 2012

 by Javier Zorzano, Scott Fitzgerald

 This example is in the public domain.

 */

// libraries
#include <GSM.h>

// initialize the library instance

GSMBand band;

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

  }

  // Beginning the band manager restarts the modem

  Serial.println("Restarting modem...");

  band.begin();

  Serial.println("Modem restarted.");

};

void loop() {

  // Get current band

  String bandName = band.getBand(); // Get and print band name

  Serial.print("Current band:");

  Serial.println(bandName);

  Serial.println("Want to change the band you're on?");

  String newBandName;

  newBandName = askUser();

  // Tell the user what we are about to do...

  Serial.print("\nConfiguring band ");

  Serial.println(newBandName);

  // Change the band

  bool operationSuccess;

  operationSuccess = band.setBand(newBandName);

  // Tell the user if the operation was OK

  if (operationSuccess) {

    Serial.println("Success");

  } else {

    Serial.println("Error while changing band");

  }

  if (operationSuccess) {

    while (true);

  }
}

// This function offers the user different options
// through the Serial interface
// The user selects one

String askUser() {

  String newBand;

  Serial.println("Select band:");

  // Print the different options

  Serial.println("1 : E-GSM(900)");

  Serial.println("2 : DCS(1800)");

  Serial.println("3 : PCS(1900)");

  Serial.println("4 : E-GSM(900)+DCS(1800) ex: Europe");

  Serial.println("5 : GSM(850)+PCS(1900) Ex: USA, South Am.");

  Serial.println("6 : GSM(850)+E-GSM(900)+DCS(1800)+PCS(1900)");

  // Empty the incoming buffer

  while (Serial.available()) {

    Serial.read();

  }

  // Wait for an answer, just look at the first character

  while (!Serial.available());

  char c = Serial.read();

  if (c == '1') {

    newBand = GSM_MODE_EGSM;

  } else if (c == '2') {

    newBand = GSM_MODE_DCS;

  } else if (c == '3') {

    newBand = GSM_MODE_PCS;

  } else if (c == '4') {

    newBand = GSM_MODE_EGSM_DCS;

  } else if (c == '5') {

    newBand = GSM_MODE_GSM850_PCS;

  } else if (c == '6') {

    newBand = GSM_MODE_GSM850_EGSM_DCS_PCS;

  } else {

    newBand = "GSM_MODE_UNDEFINED";

  }

  return newBand;
}