WLED/wled00/wled10_ntp.ino
cschwinne 19d8bbc0c3 NTP added
added more settings
updated readme
improved boot time
2016-12-29 00:03:58 +01:00

90 lines
2.4 KiB
C++

void handleNetworkTime()
{
if (ntpEnabled && ntpConnected)
{
if (ntpSyncNeeded)
{
if (ntpPacketSent)
{
if (getNtpTime())
{
ntpSyncNeeded = false;
ntpPacketSent = false;
ntpSyncTime = millis();
Serial.print("Time: ");
Serial.println(now());
} else
{
if (millis() - ntpPacketSentTime > ntpRetryMs)
{
ntpPacketSent = false; //try new packet
}
}
} else
{
WiFi.hostByName(ntpServerName, ntpIp);
sendNTPpacket();
ntpPacketSent = true;
ntpPacketSentTime = millis();
}
} else if (millis() - ntpSyncTime > ntpResyncMs)
{
ntpSyncNeeded = true;
}
}
}
bool getNtpTime()
{
int size = ntpUdp.parsePacket();
if (size >= 48) {
ntpUdp.read(ntpBuffer, 48); // read packet into the buffer
unsigned long secsSince1900;
// convert four bytes starting at location 40 to a long integer
secsSince1900 = (unsigned long)ntpBuffer[40] << 24;
secsSince1900 |= (unsigned long)ntpBuffer[41] << 16;
secsSince1900 |= (unsigned long)ntpBuffer[42] << 8;
secsSince1900 |= (unsigned long)ntpBuffer[43];
setTime(secsSince1900 - 2208988800UL + (millis() - ntpPacketSentTime)/2000); //naive approach to improve accuracy, utc
return true;
}
return false; //unable to get the time
}
void sendNTPpacket()
{
Serial.println("Sending NTP packet");
memset(ntpBuffer, 0, 48);
ntpBuffer[0] = 0b11100011; // LI, Version, Mode
ntpBuffer[1] = 0; // Stratum, or type of clock
ntpBuffer[2] = 6; // Polling Interval
ntpBuffer[3] = 0xEC; // Peer Clock Precision
ntpBuffer[12] = 49;
ntpBuffer[13] = 0x4E;
ntpBuffer[14] = 49;
ntpBuffer[15] = 52;
ntpUdp.beginPacket(ntpIp, 123); //NTP requests are to port 123
ntpUdp.write(ntpBuffer, 48);
ntpUdp.endPacket();
}
String getTimeString()
{
local = CE.toLocal(now(), &tcr);
String ret = monthStr(month(local));
ret = ret + " ";
ret = ret + day(local);
ret = ret + " ";
ret = ret + year(local);
ret = ret + ", ";
ret = ret + hour(local);
ret = ret + ":";
if (minute(local) < 10) ret = ret + "0";
ret = ret + minute(local);
ret = ret + ":";
if (second(local) < 10) ret = ret + "0";
ret = ret + second(local);
return ret;
}