86 lines
2.1 KiB
C++
86 lines
2.1 KiB
C++
/*
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* Acquires time from NTP server
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*/
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void handleNetworkTime()
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{
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if (ntpEnabled && ntpConnected && millis() - ntpLastSyncTime > 50000000L && WiFi.status() == WL_CONNECTED)
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{
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if (millis() - ntpPacketSentTime > 10000)
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{
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sendNTPPacket();
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ntpPacketSentTime = millis();
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}
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if (checkNTPResponse())
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{
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ntpLastSyncTime = millis();
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}
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}
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}
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void sendNTPPacket()
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{
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WiFi.hostByName(ntpServerName, ntpServerIP);
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Serial.println("sending NTP packet...");
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memset(ntpPacketBuffer, 0, NTP_PACKET_SIZE);
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ntpPacketBuffer[0] = 0b11100011; // LI, Version, Mode
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ntpPacketBuffer[1] = 0; // Stratum, or type of clock
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ntpPacketBuffer[2] = 6; // Polling Interval
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ntpPacketBuffer[3] = 0xEC; // Peer Clock Precision
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// 8 bytes of zero for Root Delay & Root Dispersion
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ntpPacketBuffer[12] = 49;
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ntpPacketBuffer[13] = 0x4E;
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ntpPacketBuffer[14] = 49;
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ntpPacketBuffer[15] = 52;
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ntpUdp.beginPacket(ntpServerIP, 123); //NTP requests are to port 123
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ntpUdp.write(ntpPacketBuffer, NTP_PACKET_SIZE);
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ntpUdp.endPacket();
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}
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boolean checkNTPResponse()
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{
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int cb = ntpUdp.parsePacket();
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if (cb) {
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DEBUG_PRINT("packet received, length=");
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DEBUG_PRINTLN(cb);
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ntpUdp.read(ntpPacketBuffer, NTP_PACKET_SIZE); // read the packet into the buffer
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unsigned long highWord = word(ntpPacketBuffer[40], ntpPacketBuffer[41]);
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unsigned long lowWord = word(ntpPacketBuffer[42], ntpPacketBuffer[43]);
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if (highWord == 0 && lowWord == 0) return false;
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unsigned long secsSince1900 = highWord << 16 | lowWord;
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DEBUG_PRINT("Unix time = ");
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unsigned long epoch = secsSince1900 - seventyYears;
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setTime(epoch);
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DEBUG_PRINTLN(epoch);
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return true;
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}
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return false;
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}
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String getTimeString()
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{
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local = TZ.toLocal(now(), &tcr);
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String ret = monthStr(month(local));
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ret = ret + " ";
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ret = ret + day(local);
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ret = ret + " ";
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ret = ret + year(local);
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ret = ret + ", ";
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ret = ret + hour(local);
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ret = ret + ":";
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if (minute(local) < 10) ret = ret + "0";
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ret = ret + minute(local);
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ret = ret + ":";
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if (second(local) < 10) ret = ret + "0";
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ret = ret + second(local);
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return ret;
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}
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