NNN40 change mode from AP to STA by HTTP server

Dependencies:   WIFI_API_32kRAM mbed

How to use Demo code

  • Step1: Prepare a router, and set the SSID and Password as follow
  1. SSID: "SSID"
  2. Password: "0123456789"
  • Step2: Burn demo code to NNN40 module.

You can drag and drop the sample code to NNN40 module.

  • Step3: Login module from Http server (192.168.2.1) by PC.

You can set SSID and password by browser. After clicking "confirm" button, the module will change mode from AP to STA, get IP from router

  • DEMO video:

HTTPServer.cpp

Committer:
feb11
Date:
2013-07-18
Revision:
8:464abd184b7b
Parent:
7:838d7ea07e18
Child:
9:a9bf63017854

File content as of revision 8:464abd184b7b:

#include "HTTPServer.h"

#define INVALID_FORMATTER "No valid formatter specified"

bool cmp(char* a, char* b)
{
    return strcmp(a,b) < 0;
}

HTTPServer::HTTPServer(Formatter *f):
socket(),
handlers(&cmp),
formatter(f),
reply(),
command()
{
}

HTTPServer::~HTTPServer()
{
    for(std::map<char*, RequestHandler*>::iterator itor = handlers.begin();
        itor != handlers.end();
        ++itor)
        delete itor->second;
    
    if(formatter)
        delete formatter;
}

bool HTTPServer::init(int port)
{
    socket.set_blocking(true);
    return !socket.bind(port) && !socket.listen();
}

void HTTPServer::run()
{
    TCPSocketConnection c;
    while(true)
    {
        while(socket.accept(c));
        c.set_blocking(false, 1000);
        while(c.is_connected())
        {
            char buffer[512];
            int n = c.receive_all(buffer, sizeof(buffer)-1);
            if(n == 0)
            {
                c.close();
                break;
            }
            else if(n != -1)
            {
                printf("Received data\n");
                buffer[n] = '\0';
                handle_request(buffer);
                if(formatter != NULL)
                {
                    printf("Sending data...");
                    char *page = formatter->get_page(reply);
                    do
                    {
                        c.send(page, strlen(page)+1);
                        page = formatter->get_page(reply);
                    }while(strlen(page)>0);
                    printf("done\n");
                }
                else
                    c.send(INVALID_FORMATTER, strlen(INVALID_FORMATTER)+1);
            }
            else
                printf("Error while receiving data\n");
        }
    }
}

void HTTPServer::handle_request(char *buffer)
{
    char *request_type = strtok(buffer, " ");
    char *request = strtok(NULL, " ");

    reply[0] = '\0';
    if(!strcmp(request, "/"))
        return;    
    
    if(!command.decode(request))
    {
        strcat(reply, "Malformed request");
        return;
    }
    
    std::map<char*, RequestHandler*>::iterator itor = handlers.find(request_type);
    if(itor == handlers.end())
    {
        strcat(reply, "No request handler found for this type of request.");
        return;
    }
    if(itor->second != NULL)
        itor->second->handle(command, reply);
    else
        strcat(reply, "Invalid request handler");
}

void HTTPServer::add_request_handler(char *name, RequestHandler* handler)
{
    handlers[name] = handler;
}