Development v12

Warning - Product Update

All the resources present on this section belong to Waspmote v12, Waspmote Plug & Sense! v12 and Meshlium v3.8.

If you have a Waspmote v15, Waspmote Plug & Sense! v15 or Meshlium v4.0 please go to the new Development Section.

Check what is your version and what are the differences between the old and the new one in this document.

» Wifi 30a: PC App code – UDP

This example shows how to create an UDP connection to comunicate with the Waspmote Wifi PC program.

Required Materials

1 x Waspmote
1 x Battery
1 x WiFi Module
1 x PC

Notes

- The battery has to be connected.
- Plug the antenna in the SMA connector.
- Check the PC App section inside the WiFi Networking Guide
- This example can be executed in Waspmote v12 and Waspmote v15

Code

/*
 *  ------Waspmote WIFI_30a Example--------
 *
 *  Explanation: This example shows how to create an UDP 
 *  connection to comunicate with the Waspmote Wifi PC program. 
 *
 *  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"
/////////////////////////////////

// UDP server settings
/////////////////////////////////
#define IP_ADDRESS "???.???.???.???"
#define REMOTE_PORT 3000
#define LOCAL_PORT 2000
/////////////////////////////////


// define timeout for listening to messages
#define TIMEOUT 10000

unsigned long previous;

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 the Authentication Key
  WIFI.setAuthKey(WPA1,AUTHKEY);
  // 4. Configure how to connect the AP 
  WIFI.setJoinMode(MANUAL);
  // 5. Store values
  WIFI.storeData();

  USB.println(F("WiFi setup done"));

}


void loop()
{
  // 1. Switch ON the WiFi module
  WIFI.ON(socket);

  // 2. Join Network
  if (WIFI.join(ESSID)) 
  {    
    USB.println(F("Joined AP"));

    // 3. Call the function to create UDP connection 
    if (WIFI.setUDPclient(IP_ADDRESS, REMOTE_PORT, LOCAL_PORT)) 
    {  
      USB.println(F("UDP client set"));

      // 4. Now we can use send and read functions to send and 
      // receive UDP messages. 
      // Sends an UDP message 
      WIFI.send("UDP - Hi from WIFI module!"); 

      // 5. Reads an answer from the UDP connection (NOBLO means NOT BLOCKING)
      USB.println(F("Listen to UDP socket:"));
      previous=millis();
      while(millis()-previous<TIMEOUT)
      {
        if(WIFI.read(NOBLO)>0)
        {
          for(int j=0; j<WIFI.length; j++)
          {
            USB.print(WIFI.answer[j],BYTE);
          }
          USB.println();
        }
        // Condition to avoid an overflow (DO NOT REMOVE)
        if (millis() < previous)
        {
          previous = millis();	
        }
      }

      // 6. Closes the UDP connection. 
      USB.println(F("Close UDP socket"));
      WIFI.close(); 
    } 
    else
    {
      USB.println(F("UDP client NOT set"));
    }

    // 7. Leaves AP
    WIFI.leave();
  }
  else
  {
    USB.println(F("NOT Connected to AP"));
  } 

  WIFI.OFF();  
  USB.println(F("****************************"));
  delay(3000);    

} 

Output

H#
WiFi setup done
Joined AP
UDP client set
Listen to UDP socket:
Close UDP socket
****************************
Joined AP
UDP client set
Listen to UDP socket:
Close UDP socket
****************************

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