1.9.0 web - new implementation

src/Ntp.cpp

@@ -0,0 +1,49 @@
+/*
+ * Ntp.cpp
+ */
+
+#include "Ntp.h"
+
+char *    NtpClient::TimeServerName;
+int8_t    NtpClient::timezone;
+time_t    NtpClient::syncInterval;
+IPAddress NtpClient::timeServer;
+
+AsyncUDP NtpClient::udpListener;
+byte     NtpClient::NTPpacket[NTP_PACKET_SIZE];
+
+void ICACHE_FLASH_ATTR NtpClient::Ntp(const char * server, int8_t tz, time_t syncSecs) {
+    TimeServerName = strdup(server);
+    timezone       = tz;
+    syncInterval   = syncSecs;
+    WiFi.hostByName(TimeServerName, timeServer);
+    setSyncProvider(getNtpTime);
+    setSyncInterval(syncInterval);
+}
+
+ICACHE_FLASH_ATTR NtpClient::~NtpClient() {
+    udpListener.close();
+}
+
+// send an NTP request to the time server at the given address
+time_t ICACHE_FLASH_ATTR NtpClient::getNtpTime() {
+    memset(NTPpacket, 0, sizeof(NTPpacket));
+    NTPpacket[0]  = 0b11100011;
+    NTPpacket[1]  = 0;
+    NTPpacket[2]  = 6;
+    NTPpacket[3]  = 0xEC;
+    NTPpacket[12] = 49;
+    NTPpacket[13] = 0x4E;
+    NTPpacket[14] = 49;
+    NTPpacket[15] = 52;
+    if (udpListener.connect(timeServer, 123)) {
+        udpListener.onPacket([](AsyncUDPPacket packet) {
+            unsigned long highWord    = word(packet.data()[40], packet.data()[41]);
+            unsigned long lowWord     = word(packet.data()[42], packet.data()[43]);
+            time_t        UnixUTCtime = (highWord << 16 | lowWord) - 2208988800UL;
+            setTime(UnixUTCtime);
+        });
+    }
+    udpListener.write(NTPpacket, sizeof(NTPpacket));
+    return 0;
+}