Delta / Mbed OS NNN50_SoftAP_HelloWorld Featured

Hello World program for NNN50 SoftAP mode

Dependencies:   NNN50_WIFI_API

This is a SoftAP example for Delta DFCM-NNN50 platform. In order to test with this example, user first need to open TCP Client port (use port 1030 in this example) on a PC or mobile with Socket test tool (download RealTerm' for PC, and Socket X for iOS or anymore socket test tool program available) When this example is running, the module will run as SoftAP with TCP Server. A PC or mobile can then connect to the SoftAP and connect to Server port. Once Server port is connected, user can send out the test message and expected to receive the reversed test message reply by Delta DFCM-NNN50. For more information on the usage of regular TCP and UDP Sockets, the mbed handbook can be found here

main.cpp

Committer:
tsungta
Date:
2017-04-17
Revision:
2:74cba40b8b64
Parent:
1:797e84377dc1

File content as of revision 2:74cba40b8b64:

#include "mbed.h"
#include "EthernetInterface.h"
#include "WIFIDevice.h"

WIFIDevice wifi;
EthernetInterface eth;
     
uint16_t ECHO_SERVER_PORT = 1030;
 
int main(void)
{   
    eth.init();
    //Default AP mode setting: ip = 192.168.1.1 / security = WEP / channel no. = 1, refer to WIFIDevice.h for detail
    if(wifi.enableAccessPoint("NNN50_AP", "0123456789") != 0)      
        printf("enableAccessPoint return error!...\n");
 
    TCPSocketServer server;
    
    while (true) {
        printf("Wait for new connection...\n");
        TCPSocketConnection client;
        server.bind(ECHO_SERVER_PORT);
        server.listen();
        server.accept(client);
        client.set_blocking(false, 10000); // Timeout after 10s
        
        printf("Connection from: %s\n", client.get_address());
        char buffer[256];
        while (true) {
            int n = client.receive(buffer, sizeof(buffer));
            if (n <= 0) {//disconnect with client if no tcp packet is received within blocking period or remote endpoint close the socket. 
                server.close();
                break;
            }
            // print received message to terminal
            buffer[n] = '\0';
            printf("Received message from Client :'%s'\n",buffer);
            
            // reverse the message
            char temp;
            for(int f = 0, l = n-1; f<l; f++,l--){
                temp = buffer[f];
                buffer[f] = buffer[l];
                buffer[l] = temp;
                }
            
            // print reversed message to terminal
            printf("Sending message to Client: '%s'\n",buffer);
            
            // Echo received message back to client
            client.send_all(buffer, n);
            if (n <= 0) break;
        }
        
        client.close();
    }
}