Development

Communication / WiFi:

» Wifi 28: Resolve a DNS query

This example shows how to perform a DNS query on the supplied hostname.

Required Materials

1 x Waspmote
1 x Battery
1 x WiFi Module

Notes

- The battery has to be connected.
- Plug the antenna in the SMA connector.
- Remember to set the correct AP settings

Code

/*
 *  ------Waspmote WIFI_28 Example--------
 *
 *  Explanation: This example shows how to perform a DNS query on the 
 *  supplied hostname.
 *
 *  Copyright (C) 2013 Libelium Comunicaciones Distribuidas S.L.
 *  http://www.libelium.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 2 of the License, or
 *  (at your option) any later version.
 * 
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 * 
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *  Version:                0.2
 *  Design:                 David Gascón
 *  Implementation:         Joaquin Ruiz
 */

// Include WIFI library 
#include <WaspWIFI.h>

// choose socket (SELECT USER'S SOCKET)
///////////////////////////////////////
uint8_t socket=SOCKET0;
///////////////////////////////////////

// WiFi AP settings (CHANGE TO USER'S AP)
/////////////////////////////////
#define ESSID "libelium_AP"
#define AUTHKEY "password"
/////////////////////////////////


void setup()
{
  // Switch on the WIFI module on the desired socket.
  WIFI.ON(socket);

  // 1. Configure the transport protocol (UDP, TCP, FTP, HTTP...)
  WIFI.setConnectionOptions(UDP);
  // 2. Configure the way the modules will resolve the IP address.
  WIFI.setDHCPoptions(DHCP_ON);
  // 3. Configure how to connect the AP 
  WIFI.setJoinMode(MANUAL); 
  // 4. Set the AP authentication key
  WIFI.setAuthKey(WPA1,AUTHKEY); 
  // 5. Save Data to module's memory
  WIFI.storeData();
}

void loop()
{
  // Switch ON the WiFi module on the desired socket
  if( WIFI.ON(socket) == 1 )
  {   
    USB.println(F("Switched on"));

    // If it is manual, call join giving the name of the AP 
    if(WIFI.join(ESSID)) 
    { 
      USB.println(F("Joined network"));

      WIFI.resolve("www.libelium.com");
    }
    else
    {
      USB.println(F("ERROR joining"));
    }
  }
  else
  {
    USB.println(F("ERROR switching on"));
  }

  // switch off the module
  WIFI.OFF();
  USB.println(F("**********************"));
  delay(2000);

}


Output

D#
Switched on
Joined network
R: lookup www.libelium.com

www.libelium.com=46.105.20.38
<2.32>
**********************
Switched on
Joined network
R: lookup www.libelium.com

www.libelium.com=46.105.20.38
<2.32>
**********************
Switched on
Joined network
R: lookup www.libelium.com

www.libelium.com=46.105.20.38
<2.32>
**********************
...

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