/// <summary>
/// Constructor for creating the web server
/// Example: HttpWebServer webServer = new HttpWebServer("SSID", "password", -4);
/// </summary>
public HttpWebServer(string SSID, string Password, Double TimeOffSet = -5)
{
bool success;
CancellationTokenSource cs = new(60000);
success = NetworkHelper.ConnectWifiDhcp(SSID, Password, setDateTime: true, token: cs.Token);
// Initialize Socket class
socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
//Request and bind to an IP from DHCP server
socket.Bind(new IPEndPoint(IPAddress.Any, 80));
Debug.WriteLine("IP " + NetworkInterface.GetAllNetworkInterfaces()[0].IPv4Address);
String macString = BitConverter.ToString(NetworkInterface.GetAllNetworkInterfaces()[0].PhysicalAddress);
Debug.WriteLine("Mac " + macString);
// Start listen for web requests
socket.Listen(10);
// SMTP connects automatically to get time
Rtc.SetSystemTime(DateTime.UtcNow.AddHours(TimeOffSet));
Debug.WriteLine("System time is:" + DateTime.UtcNow.ToString());
// Create and start a thead for listening for server requests
Thread tListenforRequest = new Thread(ListenForRequest);
tListenforRequest.Start();
}
/// <summary>
/// Constructor for creating the web server
/// Example: HttpWebServer webServer = new HttpWebServer("SSID", "password", -4);
/// </summary>
public HttpWebServer(string SSID, string Password, Double TimeOffSet = -5)
{
_SSID = SSID;
_Password = Password;
_TimeOffSet = TimeOffSet;
ConnectNetwork();
// Initialize Socket class
socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
//Request and bind to an IP from DHCP server
socket.Bind(new IPEndPoint(IPAddress.Any, 80));
Console.WriteLine(NetworkInterface.GetAllNetworkInterfaces()[0].IPv4Address);
// Start listen for web requests
socket.Listen(10);
// SMTP connects automatically to get time
Rtc.SetSystemTime(DateTime.UtcNow.AddHours(_TimeOffSet));
Console.WriteLine("System time is:" + DateTime.UtcNow.ToString());
// Create and start a thead for listening for server requests
Thread tListenforRequest = new Thread(ListenForRequest);
tListenforRequest.Start();
}
public static void Main()
{
Console.WriteLine("system time is: " + DateTime.UtcNow);
// set RTC
Rtc.SetSystemTime(new DateTime(2018, 2, 28, 10, 20, 30));
Console.WriteLine("system time is: " + DateTime.UtcNow);
Thread.Sleep(Timeout.Infinite);
}
private void Sync_clocks()
{
var time = clock.GetDateTime();
if (time.Year < 2100)
{
Rtc.SetSystemTime(time);
InvokeOn1Spassed(time);
}
else
{
InvokeOn1Spassed(DateTime.UtcNow, false);
}
}
private static bool SetupNetwork()
{
CancellationTokenSource cs = new CancellationTokenSource(5000); //5 seconds.
// We are using TLS and it requires valid date & time (so we should set the option to true, but SNTP is run in the background, and setting it manually causes issues for the moment!!!)
// Although setting it to false seems to cause a worse issue. Let us fix this by using a managed class instead.
try
{
_logger.LogInformation("Waiting for network up and IP address...");
var success = NetworkHelper.SetupAndConnectNetwork(requiresDateTime: true, token: cs.Token);
if (!success)
{
_logger.LogWarning($"Failed to receive an IP address and/or valid DateTime. Error: {NetworkHelper.Status}.");
if (NetworkHelper.HelperException != null)
{
_logger.LogWarning($"Failed to receive an IP address and/or valid DateTime. Error: {NetworkHelper.HelperException}.");
}
_logger.LogInformation("It is likely a DateTime problem, so we will now try to set it using a managed helper class!");
success = Rtc.SetSystemTime(ManagedNtpClient.GetNetworkTime());
if (success)
{
_logger.LogInformation("Retrived DateTime using Managed NTP Helper class...");
}
else
{
_logger.LogWarning("Failed to Retrive DateTime (or IP Address)! Retrying...");
SetupNetwork();
}
_logger.LogInformation($"RTC = {DateTime.UtcNow}");
return(false);
}
return(true);
}
catch (Exception e)
{
_logger.LogWarning(e.Message.ToString());
return(false);
}
}
static void UpdateRTCFromNetwork()
{
Console.WriteLine("... requesting time from NTP server ...");
//////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////
// the following code block uses an async call to SNTP client which should be OK for most of the use scenarios
// check an alternative in the code block commented bellow
SIM800H.SntpClient.SyncNetworkTimeAsync("pool.ntp.org", TimeSpan.Zero, (ar) =>
{
// update RTC only if update was successful
if (((SyncNetworkTimeAsyncResult)ar).Result == SyncResult.SyncSuccessful)
{
// get current date time and update RTC
DateTime rtcValue = SIM800H.GetDateTime();
// set framework date time
Rtc.SetSystemTime(rtcValue);
Console.WriteLine("!!! new time from NTP server: " + rtcValue.ToString());
// done here, dispose SNTP client to free up memory
SIM800H.SntpClient.Dispose();
SIM800H.SntpClient = null;
}
else
{
Console.WriteLine("### failed to get time from NTP server ###");
}
});
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// if your network connection is not that good and you definitely need a valid RTC better do this inside a try/catch AND using a retry strategy
// the implementation bellow uses a synchronous call to SNTP client
// for the simplest async call see the
//byte retryCounter = 0;
//while (retryCounter <= 3)
//{
// try
// {
// var result = SIM800H.SntpClient.SyncNetworkTimeAsync("time.nist.gov", TimeSpan.Zero).End();
// // check result
// if (result == SyncResult.SyncSuccessful)
// {
// // get current date time and update RTC
// DateTime rtcValue = SIM800H.GetDateTime();
// // set framework date time
// Rtc.SetSystemTime(rtcValue);
// Console.WriteLine("!!! new time from NTP server: " + rtcValue.ToString());
// // done here, dispose SNTP client to free up memory
// SIM800H.SntpClient.Dispose();
// SIM800H.SntpClient = null;
// return;
// }
// else
// {
// Console.WriteLine("### failed to get time from NTP server ###");
// }
// }
// catch
// {
// // failed updating RTC
// // flag this
// }
// // add retry
// retryCounter++;
// // progressive wait 15*N seconds before next retry
// Thread.Sleep(15000 * retryCounter);
//}
}
