main.cpp

00001 #include "mbed.h"
00002 #include "SpwfInterface.h"
00003 #include "NTPClient.h"
00004 #include "TCPSocket.h"
00005 
00006 //www.mbed.com CA certificate in PEM format
00007 char  CA_cert []="-----BEGIN CERTIFICATE-----\r\n"
00008 "MIIDVDCCAjygAwIBAgIDAjRWMA0GCSqGSIb3DQEBBQUAMEIxCzAJBgNVBAYTAlVT\r\n"
00009 "MRYwFAYDVQQKEw1HZW9UcnVzdCBJbmMuMRswGQYDVQQDExJHZW9UcnVzdCBHbG9i\r\n"
00010 "YWwgQ0EwHhcNMDIwNTIxMDQwMDAwWhcNMjIwNTIxMDQwMDAwWjBCMQswCQYDVQQG\r\n"
00011 "EwJVUzEWMBQGA1UEChMNR2VvVHJ1c3QgSW5jLjEbMBkGA1UEAxMSR2VvVHJ1c3Qg\r\n"
00012 "R2xvYmFsIENBMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA2swYYzD9\r\n"
00013 "9BcjGlZ+W988bDjkcbd4kdS8odhM+KhDtgPpTSEHCIjaWC9mOSm9BXiLnTjoBbdq\r\n"
00014 "fnGk5sRgprDvgOSJKA+eJdbtg/OtppHHmMlCGDUUna2YRpIuT8rxh0PBFpVXLVDv\r\n"
00015 "iS2Aelet8u5fa9IAjbkU+BQVNdnARqN7csiRv8lVK83Qlz6cJmTM386DGXHKTubU\r\n"
00016 "1XupGc1V3sjs0l44U+VcT4wt/lAjNvxm5suOpDkZALeVAjmRCw7+OC7RHQWa9k0+\r\n"
00017 "bw8HHa8sHo9gOeL6NlMTOdReJivbPagUvTLrGAMoUgRx5aszPeE4uwc2hGKceeoW\r\n"
00018 "MPRfwCvocWvk+QIDAQABo1MwUTAPBgNVHRMBAf8EBTADAQH/MB0GA1UdDgQWBBTA\r\n"
00019 "ephojYn7qwVkDBF9qn1luMrMTjAfBgNVHSMEGDAWgBTAephojYn7qwVkDBF9qn1l\r\n"
00020 "uMrMTjANBgkqhkiG9w0BAQUFAAOCAQEANeMpauUvXVSOKVCUn5kaFOSPeCpilKIn\r\n"
00021 "Z57QzxpeR+nBsqTP3UEaBU6bS+5Kb1VSsyShNwrrZHYqLizz/Tt1kL/6cdjHPTfS\r\n"
00022 "tQWVYrmm3ok9Nns4d0iXrKYgjy6myQzCsplFAMfOEVEiIuCl6rYVSAlk6l5PdPcF\r\n"
00023 "PseKUgzbFbS9bZvlxrFUaKnjaZC2mqUPuLk/IH2uSrW4nOQdtqvmlKXBx4Ot2/Un\r\n"
00024 "hw4EbNX/3aBd7YdStysVAq45pmp06drE57xNNB6pXE0zX5IJL4hmXXeXxx12E6nV\r\n"
00025 "5fEWCRE11azbJHFwLJhWC9kXtNHjUStedejV0NxPNO3CBWaAocvmMw==\r\n"
00026 "-----END CERTIFICATE-----\r\n";
00027 
00028 SpwfSAInterface spwf(D8, D2, false);  // Wifi interface
00029 DigitalOut myled(LED1);
00030 
00031 int main() 
00032 {
00033     time_t ctTime;
00034     ctTime = time(NULL);
00035     
00036     printf ("\n\rConnecting to WiFi ...\n\r");  
00037     spwf.connect("STM","STMDemo", NSAPI_SECURITY_WPA2);
00038 
00039     NTPClient ntp(spwf);        
00040 
00041     printf("Initial System Time is: %s\r\n", ctime(&ctTime));   
00042     printf("Trying to update time...\r\n");
00043     if (ntp.setTime("0.pool.ntp.org") == 0)
00044     {
00045       printf("Set time successfully\r\n");
00046       ctTime = time(NULL);
00047       printf("Time is set to (UTC): %s\r\n", ctime(&ctTime));
00048       if (!spwf.set_time(ctTime)) printf ("ERROR set_time\n\r");     
00049       if (!spwf.clean_TLS_certificate(ALL)) printf ("ERROR clean_TLS_certificate\n\r");
00050       if (!spwf.set_TLS_certificate(CA_cert, sizeof(CA_cert), FLASH_CA_ROOT_CERT)) printf ("ERROR set_TLS_certificate\n\r");
00051       if (!spwf.set_TLS_SRV_domain("*.mbed.com",FLASH_DOMAIN)) printf ("ERROR set_TLS_CA_domain\n\r");
00052 // NOTE:  DNS requires UDP socket. DNS is invoked while connecting a secure socket to resolve URL to IP,
00053 //         so DNS doesnt answer as it requires unsecure UDP socket connection.
00054 //         workaroud: convert URL to IP quering DNS before secure socket creation, then connect 
00055 //         the secure socket created to the  retrieved IP.
00056       SocketAddress addr(&spwf, "www.mbed.com", 443);  // must be called BEFORE set_secure_socket() to allow DNS udp connection
00057       spwf.set_secure_mode();     
00058       TCPSocket  socket(&spwf);   
00059       spwf.set_unsecure_mode();                  
00060       int err = socket.connect(addr);
00061       if (err != 0 )printf ("ERROR opening %d\n\r", err);
00062       else printf ("--->>> Secure socket CONNECTED to: %s\n\r", addr.get_ip_address());
00063       socket.close();      
00064       printf ("Socket closed\n\r");
00065     }  
00066     else
00067     {
00068       printf("Error: NTP could not contact server\r\n");
00069     }    
00070     spwf.disconnect();
00071     printf ("WIFI disconnected, exiting ...\n\r");
00072 
00073     while(1) { 
00074       wait(1);
00075       myled = !myled;
00076     }    
00077 }