main.cpp

00001 /******************** (C) COPYRIGHT 2016 Delta Electronics, Inc. ***************
00002 *
00003 * File Name : main.cpp
00004 * Authors   : Tsungta Wu - CPBG (tsungta.wu@deltaww.com)
00005 * Version   : V.1.0.0
00006 * Date      : 2016/Nov/24
00007 *
00008 * This example only show the most basic WiFi operation include AP scan and connect 
00009 * The usage of TCP/UDP socket please refer to the mbed Handbook from the link below
00010 * https://developer.mbed.org/handbook/Socket
00011 *
00012 *******************************************************************************/
00013 
00014 #include "mbed.h"
00015 #include "EthernetInterface.h"
00016 #include "WIFIDevice.h"
00017 
00018 const char* ECHO_SERVER_ADDRESS = "192.168.2.13";
00019 const int ECHO_SERVER_PORT = 1030;
00020 
00021 void scanCallback(tstrM2mWifiscanResult result)
00022 {
00023     printf("SSID: %s \n", result.au8SSID);
00024     printf("RSSI: %i \n", result.s8rssi);
00025 }
00026 
00027 int main() {
00028 
00029     EthernetInterface eth;
00030     WIFIDevice wifi;
00031 
00032     eth.init();
00033 
00034     wifi.apScan(scanCallback);
00035              
00036     wifi.setNetwork(M2M_WIFI_SEC_WPA_PSK, "TP-LINK_2.4G_TTWU", "0972753720"); 
00037     
00038     eth.connect();    
00039 
00040     if(wifi.is_AP_connected())
00041         printf("Connect Success! \n");
00042     else
00043         printf("Connect Fail! \n");    
00044 
00045     printf("MAC: %s\n", eth.getMACAddress());            
00046     printf("IP: %s\n", eth.getIPAddress());
00047     printf("Gateway: %s\n", eth.getGateway());
00048     printf("NetworkMask: %s\n", eth.getNetworkMask()); 
00049 
00050     UDPSocket sock;
00051     sock.init();
00052     
00053     Endpoint echo_server;
00054     echo_server.set_address(ECHO_SERVER_ADDRESS, ECHO_SERVER_PORT);
00055     
00056     char out_buffer[] = "Hello World";
00057     printf("Sending  message '%s' to server (%s)\n",out_buffer,ECHO_SERVER_ADDRESS);
00058     sock.sendTo(echo_server, out_buffer, sizeof(out_buffer));
00059     
00060     char in_buffer[256];    //IMPORTANT, array size MUST >= the actual received data size or set to maximum of 1400 if there is uncertainty
00061     int n = sock.receiveFrom(echo_server, in_buffer, sizeof(in_buffer));
00062     
00063     if(n <0)
00064         in_buffer[0] = '\0';//IMPORTANT, in case n = -1 when set_bloacking is timeout, prevent the illegal array in_buffer[-1] access 
00065     else
00066         in_buffer[n] = '\0';
00067         
00068     printf("Received message from server: '%s'\n", in_buffer);
00069     
00070     sock.close();
00071     
00072     eth.disconnect();                             
00073     
00074     wifi.sleep();
00075                                  
00076     while(1) {
00077     }
00078 }
00079