90 lines
2.4 KiB
Arduino
90 lines
2.4 KiB
Arduino
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void handleNetworkTime()
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{
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if (ntpEnabled && ntpConnected)
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{
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if (ntpSyncNeeded)
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{
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if (ntpPacketSent)
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{
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if (getNtpTime())
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{
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ntpSyncNeeded = false;
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ntpPacketSent = false;
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ntpSyncTime = millis();
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Serial.print("Time: ");
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Serial.println(now());
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} else
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{
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if (millis() - ntpPacketSentTime > ntpRetryMs)
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{
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ntpPacketSent = false; //try new packet
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}
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}
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} else
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{
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WiFi.hostByName(ntpServerName, ntpIp);
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sendNTPpacket();
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ntpPacketSent = true;
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ntpPacketSentTime = millis();
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}
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} else if (millis() - ntpSyncTime > ntpResyncMs)
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{
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ntpSyncNeeded = true;
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}
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}
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}
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bool getNtpTime()
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{
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int size = ntpUdp.parsePacket();
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if (size >= 48) {
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ntpUdp.read(ntpBuffer, 48); // read packet into the buffer
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unsigned long secsSince1900;
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// convert four bytes starting at location 40 to a long integer
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secsSince1900 = (unsigned long)ntpBuffer[40] << 24;
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secsSince1900 |= (unsigned long)ntpBuffer[41] << 16;
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secsSince1900 |= (unsigned long)ntpBuffer[42] << 8;
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secsSince1900 |= (unsigned long)ntpBuffer[43];
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setTime(secsSince1900 - 2208988800UL + (millis() - ntpPacketSentTime)/2000); //naive approach to improve accuracy, utc
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return true;
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}
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return false; //unable to get the time
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}
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void sendNTPpacket()
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{
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Serial.println("Sending NTP packet");
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memset(ntpBuffer, 0, 48);
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ntpBuffer[0] = 0b11100011; // LI, Version, Mode
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ntpBuffer[1] = 0; // Stratum, or type of clock
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ntpBuffer[2] = 6; // Polling Interval
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ntpBuffer[3] = 0xEC; // Peer Clock Precision
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ntpBuffer[12] = 49;
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ntpBuffer[13] = 0x4E;
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ntpBuffer[14] = 49;
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ntpBuffer[15] = 52;
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ntpUdp.beginPacket(ntpIp, 123); //NTP requests are to port 123
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ntpUdp.write(ntpBuffer, 48);
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ntpUdp.endPacket();
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}
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String getTimeString()
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{
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local = CE.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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