NTP client app setting system time and X-NUCLEO-IDW01M1 Wi-Fi board time connecting to internet NTP UTC time server.
Dependencies: NTPClient NetworkSocketAPI X_NUCLEO_IDW01M1v2 mbed
Fork of NTPClient_HelloWorld by
Example of retrieval of current time using an NTP server.
Time is then used to perform a TLS secure connection to https://mbed.org.
The application is meant to be used with mbed OS 2 ("Classic") only (no mbedOS 5 support).
main.cpp
- Committer:
- mapellil
- Date:
- 2017-01-13
- Revision:
- 9:c710dd7a4242
- Parent:
- 7:a33ce4fe1b91
File content as of revision 9:c710dd7a4242:
#include "mbed.h" #include "SpwfInterface.h" #include "NTPClient.h" #include "TCPSocket.h" //www.mbed.com CA certificate in PEM format char CA_cert []="-----BEGIN CERTIFICATE-----\r\n" "MIIDVDCCAjygAwIBAgIDAjRWMA0GCSqGSIb3DQEBBQUAMEIxCzAJBgNVBAYTAlVT\r\n" "MRYwFAYDVQQKEw1HZW9UcnVzdCBJbmMuMRswGQYDVQQDExJHZW9UcnVzdCBHbG9i\r\n" "YWwgQ0EwHhcNMDIwNTIxMDQwMDAwWhcNMjIwNTIxMDQwMDAwWjBCMQswCQYDVQQG\r\n" "EwJVUzEWMBQGA1UEChMNR2VvVHJ1c3QgSW5jLjEbMBkGA1UEAxMSR2VvVHJ1c3Qg\r\n" "R2xvYmFsIENBMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA2swYYzD9\r\n" "9BcjGlZ+W988bDjkcbd4kdS8odhM+KhDtgPpTSEHCIjaWC9mOSm9BXiLnTjoBbdq\r\n" "fnGk5sRgprDvgOSJKA+eJdbtg/OtppHHmMlCGDUUna2YRpIuT8rxh0PBFpVXLVDv\r\n" "iS2Aelet8u5fa9IAjbkU+BQVNdnARqN7csiRv8lVK83Qlz6cJmTM386DGXHKTubU\r\n" "1XupGc1V3sjs0l44U+VcT4wt/lAjNvxm5suOpDkZALeVAjmRCw7+OC7RHQWa9k0+\r\n" "bw8HHa8sHo9gOeL6NlMTOdReJivbPagUvTLrGAMoUgRx5aszPeE4uwc2hGKceeoW\r\n" "MPRfwCvocWvk+QIDAQABo1MwUTAPBgNVHRMBAf8EBTADAQH/MB0GA1UdDgQWBBTA\r\n" "ephojYn7qwVkDBF9qn1luMrMTjAfBgNVHSMEGDAWgBTAephojYn7qwVkDBF9qn1l\r\n" "uMrMTjANBgkqhkiG9w0BAQUFAAOCAQEANeMpauUvXVSOKVCUn5kaFOSPeCpilKIn\r\n" "Z57QzxpeR+nBsqTP3UEaBU6bS+5Kb1VSsyShNwrrZHYqLizz/Tt1kL/6cdjHPTfS\r\n" "tQWVYrmm3ok9Nns4d0iXrKYgjy6myQzCsplFAMfOEVEiIuCl6rYVSAlk6l5PdPcF\r\n" "PseKUgzbFbS9bZvlxrFUaKnjaZC2mqUPuLk/IH2uSrW4nOQdtqvmlKXBx4Ot2/Un\r\n" "hw4EbNX/3aBd7YdStysVAq45pmp06drE57xNNB6pXE0zX5IJL4hmXXeXxx12E6nV\r\n" "5fEWCRE11azbJHFwLJhWC9kXtNHjUStedejV0NxPNO3CBWaAocvmMw==\r\n" "-----END CERTIFICATE-----\r\n"; SpwfSAInterface spwf(D8, D2, false); // Wifi interface DigitalOut myled(LED1); int main() { time_t ctTime; ctTime = time(NULL); printf ("\n\rConnecting to WiFi ...\n\r"); spwf.connect("STM","STMDemo", NSAPI_SECURITY_WPA2); NTPClient ntp(spwf); printf("Initial System Time is: %s\r\n", ctime(&ctTime)); printf("Trying to update time...\r\n"); if (ntp.setTime("0.pool.ntp.org") == 0) { printf("Set time successfully\r\n"); ctTime = time(NULL); printf("Time is set to (UTC): %s\r\n", ctime(&ctTime)); if (!spwf.set_time(ctTime)) printf ("ERROR set_time\n\r"); if (!spwf.clean_TLS_certificate(ALL)) printf ("ERROR clean_TLS_certificate\n\r"); if (!spwf.set_TLS_certificate(CA_cert, sizeof(CA_cert), FLASH_CA_ROOT_CERT)) printf ("ERROR set_TLS_certificate\n\r"); if (!spwf.set_TLS_SRV_domain("*.mbed.com",FLASH_DOMAIN)) printf ("ERROR set_TLS_CA_domain\n\r"); // NOTE: DNS requires UDP socket. DNS is invoked while connecting a secure socket to resolve URL to IP, // so DNS doesnt answer as it requires unsecure UDP socket connection. // workaroud: convert URL to IP quering DNS before secure socket creation, then connect // the secure socket created to the retrieved IP. SocketAddress addr(&spwf, "www.mbed.com", 443); // must be called BEFORE set_secure_socket() to allow DNS udp connection spwf.set_secure_mode(); TCPSocket socket(&spwf); spwf.set_unsecure_mode(); int err = socket.connect(addr); if (err != 0 )printf ("ERROR opening %d\n\r", err); else printf ("--->>> Secure socket CONNECTED to: %s\n\r", addr.get_ip_address()); socket.close(); printf ("Socket closed\n\r"); } else { printf("Error: NTP could not contact server\r\n"); } spwf.disconnect(); printf ("WIFI disconnected, exiting ...\n\r"); while(1) { wait(1); myled = !myled; } }