source: rtos_arduino/trunk/arduino_lib/libraries/GSM/src/GSM3ShieldV1BandManagement.cpp@ 136

#include <GSM3ShieldV1BandManagement.h>

GSM3ShieldV1BandManagement::GSM3ShieldV1BandManagement(bool trace): modem(trace)
{
        quectelStrings[UNDEFINED]="";
        quectelStrings[EGSM_MODE]="\"EGSM_MODE\"";
        quectelStrings[DCS_MODE]="\"DCS_MODE\"";
        quectelStrings[PCS_MODE]="\"PCS_MODE\"";
        quectelStrings[EGSM_DCS_MODE]="\"EGSM_DCS_MODE\"";
        quectelStrings[GSM850_PCS_MODE]="\"GSM850_PCS_MODE\"";
        quectelStrings[GSM850_EGSM_DCS_PCS_MODE]="\"GSM850_EGSM_DCS_PCS_MODE\"";        
}

GSM3_NetworkStatus_t GSM3ShieldV1BandManagement::begin()
{
        // check modem response
        modem.begin();

        // reset hardware
        modem.restartModem();

        return IDLE;
}

String GSM3ShieldV1BandManagement::getBand()
{
  String modemResponse=modem.writeModemCommand("AT+QBAND?", 2000);
        
  for(GSM3GSMBand i=GSM850_EGSM_DCS_PCS_MODE;i>UNDEFINED;i=(GSM3GSMBand)((int)i-1))
  {
    if(modemResponse.indexOf(quectelStrings[i])>=0)
      return quectelStrings[i];
  }

  Serial.print("Unrecognized modem answer:");
  Serial.println(modemResponse);
  
  return "";
}

bool GSM3ShieldV1BandManagement::setBand(String band)
{
        String command;
        String modemResponse;
        bool found=false;

        command="AT+QBAND=";
        for(GSM3GSMBand i=EGSM_MODE;((i<=GSM850_EGSM_DCS_PCS_MODE)&&(!found));i=(GSM3GSMBand)((int)i+1))
        {
                String aux=quectelStrings[i];
                if(aux.indexOf(band)>=0)
                {
                    command+=aux;
                        found=true;
                }
        }
        
        if(!found)
                return false;
        // Quad-band takes an awful lot of time
    modemResponse=modem.writeModemCommand(command, 15000);
        
        if(modemResponse.indexOf("QBAND")>=0)
      return true;
        else
                return false;
}