Missing serialize.

Fixes #3285

wled00/cfg.cpp

@@ -481,6 +481,7 @@ bool deserializeConfig(JsonObject doc, bool fromFS) {
   JsonObject if_ntp = interfaces[F("ntp")];
   CJSON(ntpEnabled, if_ntp["en"]);
   getStringFromJson(ntpServerName, if_ntp[F("host")], 33); // "1.wled.pool.ntp.org"
+  CJSON(ntpSyncInterval, if_ntp[F("int")]);
   CJSON(currentTimezone, if_ntp[F("tz")]);
   CJSON(utcOffsetSecs, if_ntp[F("offset")]);
   CJSON(useAMPM, if_ntp[F("ampm")]);
@@ -939,6 +940,7 @@ void serializeConfig() {
   JsonObject if_ntp = interfaces.createNestedObject("ntp");
   if_ntp["en"] = ntpEnabled;
   if_ntp[F("host")] = ntpServerName;
+  if_ntp[F("int")] = ntpSyncInterval;
   if_ntp[F("tz")] = currentTimezone;
   if_ntp[F("offset")] = utcOffsetSecs;
   if_ntp[F("ampm")] = useAMPM;

wled00/data/settings_time.htm

@@ -171,6 +171,13 @@
 		Get time from NTP server: <input type="checkbox" name="NT"><br>
 		<input type="text" name="NS" maxlength="32"><br>
 		Use 24h format: <input type="checkbox" name="CF"><br>
+		NTP refresh: <select name="NP">
+			<option value="86400">once</option>
+			<option value="43200" selected>twice</option>
+			<option value="21600">4 times</option>
+			<option value="14400">6 times</option>
+			<option value="10800">8 times</option>
+		</select> per day<br>
 		Time zone: 
 		<select name="TZ">
 			<option value="0" selected>GMT(UTC)</option>

wled00/ntp.cpp

@@ -6,7 +6,6 @@
  * Acquires time from NTP server
  */
 //#define WLED_DEBUG_NTP
-#define NTP_SYNC_INTERVAL 42000UL //Get fresh NTP time about twice per day
 
 Timezone* tz;
 
@@ -180,7 +179,7 @@ void handleTime() {
 
 void handleNetworkTime()
 {
-  if (ntpEnabled && ntpConnected && millis() - ntpLastSyncTime > (1000*NTP_SYNC_INTERVAL) && WLED_CONNECTED)
+  if (ntpEnabled && ntpConnected && millis() - ntpLastSyncTime > (1000UL*ntpSyncInterval) && WLED_CONNECTED)
   {
     if (millis() - ntpPacketSentTime > 10000)
     {

wled00/set.cpp

@@ -390,6 +390,7 @@ void handleSettingsSet(AsyncWebServerRequest *request, byte subPage)
     ntpEnabled = request->hasArg(F("NT"));
     strlcpy(ntpServerName, request->arg(F("NS")).c_str(), 33);
     useAMPM = !request->hasArg(F("CF"));
+    ntpSyncInterval = min(86400U, max(10800U, (unsigned int)request->arg(F("NP")).toInt()));
     currentTimezone = request->arg(F("TZ")).toInt();
     utcOffsetSecs = request->arg(F("UO")).toInt();
 

wled00/wled.h

@@ -639,13 +639,14 @@ WLED_GLOBAL DNSServer dnsServer;
 // network time
 WLED_GLOBAL bool ntpConnected _INIT(false);
 WLED_GLOBAL time_t localTime _INIT(0);
+WLED_GLOBAL uint32_t ntpSyncInterval _INIT(43200U);
 WLED_GLOBAL unsigned long ntpLastSyncTime _INIT(999000000L);
 WLED_GLOBAL unsigned long ntpPacketSentTime _INIT(999000000L);
 WLED_GLOBAL IPAddress ntpServerIP;
 WLED_GLOBAL uint16_t ntpLocalPort _INIT(2390);
 WLED_GLOBAL uint16_t rolloverMillis _INIT(0);
-WLED_GLOBAL float longitude _INIT(0.0);
-WLED_GLOBAL float latitude _INIT(0.0);
+WLED_GLOBAL float longitude _INIT(0.0f);
+WLED_GLOBAL float latitude _INIT(0.0f);
 WLED_GLOBAL time_t sunrise _INIT(0);
 WLED_GLOBAL time_t sunset _INIT(0);
 WLED_GLOBAL Toki toki _INIT(Toki());

wled00/xml.cpp

@@ -574,6 +574,15 @@ void getSettingsJS(byte subPage, char* dest)
     sappend('c',SET_F("NT"),ntpEnabled);
     sappends('s',SET_F("NS"),ntpServerName);
     sappend('c',SET_F("CF"),!useAMPM);
+    int syncIntervalIndex;
+    switch (ntpSyncInterval) {
+      case 86400: syncIntervalIndex = 0; break;
+      case 21600: syncIntervalIndex = 2; break;
+      case 14400: syncIntervalIndex = 3; break;
+      case 10800: syncIntervalIndex = 4; break;
+      default   : syncIntervalIndex = 1; break;
+    }
+    sappend('i',SET_F("NP"),syncIntervalIndex);
     sappend('i',SET_F("TZ"),currentTimezone);
     sappend('v',SET_F("UO"),utcOffsetSecs);
     char tm[32];