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 23: UDP server

This example shows how to create an UDP server connection.

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
- This example can be executed in Waspmote v12 and Waspmote v15

Code

/*
 *  ------Waspmote WIFI_23 Example--------
 *
 *  Explanation: This example shows how to create an UDP Server 
 *  connection. 
 *
 *  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 LOCAL_PORT 2000
/////////////////////////////////

// define time to be listening
#define TIMEOUT 60000
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. Set local port
  WIFI.setLocalPort(LOCAL_PORT);
  // 5. Configure how to connect the AP 
  WIFI.setJoinMode(MANUAL);  
  // 6. Store values
  WIFI.storeData();
}

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

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

    // 3. Get IP address
    USB.println(F("-----------------------"));    
    USB.println(F("get IP"));
    USB.println(F("-----------------------"));
    WIFI.getIP();
    USB.println();

    // 4. Call the function to create UDP connection in LOCAL_PORT 
    if( WIFI.setUDPserver(LOCAL_PORT) ) 
    { 
      USB.println(F("UDP server set"));

      // Listen for a while
      USB.print(F("Listening for incoming data during "));
      USB.print(TIMEOUT);
      USB.println(F(" milliseconds"));

      previous=millis();
      while( millis()-previous<TIMEOUT ) 
      {
        // Reads from the UDP connection 
        WIFI.read(NOBLO);  

        if(WIFI.length>0)
        {
          USB.print(F("RX: "));
          for( int k=0; k<WIFI.length; k++)
          {
            USB.print(WIFI.answer[k],BYTE);
          }
          USB.println(); 
        }    
        // Condition to avoid an overflow (DO NOT REMOVE)
        if (millis() < previous)
        {
          previous = millis();	
        }

      } 

      // Exits from UDP sending data mode. 
      USB.println(F("Close UDP socket"));
      WIFI.close(); 
    }
    else
    {
      USB.println(F("UDP server NOT set"));
    } 
  }
  else
  {
    USB.println(F("NOT Connected to AP"));
  } 

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



Output

H#
Joined AP
-----------------------
get IP
-----------------------
IF=UP
DHCP=ON
IP=10.10.10.11:2000
NM=255.255.255.0
GW=10.10.10.1
HOST=0.0.0.0:2000
PROTO=UDP,
MTU=1524
FLAGS=0x7
TCPMODE=0x0
BACKUP=0.0.0.0
<2.36>

UDP server set
Listening for incoming data during 60000 milliseconds
RX: UDP - Hi from WIFI module!
Close UDP socket
****************************
...

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