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Increases the accuracy of the synchronization by a factor of 50. #132

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Increases the accuracy of the synchronization by a factor of 50. #132

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8 changes: 7 additions & 1 deletion NTPClient.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -114,6 +114,12 @@ bool NTPClient::forceUpdate() {

this->_currentEpoc = secsSince1900 - SEVENZYYEARS;

// get also the most significant 16 bits of the fraction of the second
unsigned long fracWord = word(this->_packetBuffer[44], this->_packetBuffer[45]);

// Account for fraction of the second.
this->_lastUpdate -= (fracWord/66); // should be devided by 2^16/1000 = 65.536 but 66 is close enough

return true; // return true after successful update
}

Expand Down Expand Up @@ -207,4 +213,4 @@ void NTPClient::sendNTPPacket() {
void NTPClient::setRandomPort(unsigned int minValue, unsigned int maxValue) {
randomSeed(analogRead(0));
this->_port = random(minValue, maxValue);
}
}