LoRa_APRS_iGate/lib/NTPClient/NTPClient.cpp

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2021-01-01 22:23:27 +00:00
/**
* The MIT License (MIT)
* Copyright (c) 2015 by Fabrice Weinberg
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "NTPClient.h"
NTPClient::NTPClient() {
}
NTPClient::NTPClient(long timeOffset) {
this->_timeOffset = timeOffset;
}
NTPClient::NTPClient(const char* poolServerName) {
this->_poolServerName = poolServerName;
}
NTPClient::NTPClient(IPAddress poolServerIP) {
this->_poolServerIP = poolServerIP;
this->_poolServerName = NULL;
}
NTPClient::NTPClient(const char* poolServerName, long timeOffset) {
this->_timeOffset = timeOffset;
this->_poolServerName = poolServerName;
}
NTPClient::NTPClient(IPAddress poolServerIP, long timeOffset){
this->_timeOffset = timeOffset;
this->_poolServerIP = poolServerIP;
this->_poolServerName = NULL;
}
NTPClient::NTPClient(const char* poolServerName, long timeOffset, unsigned long updateInterval) {
this->_timeOffset = timeOffset;
this->_poolServerName = poolServerName;
this->_updateInterval = updateInterval;
}
NTPClient::NTPClient(IPAddress poolServerIP, long timeOffset, unsigned long updateInterval) {
this->_timeOffset = timeOffset;
this->_poolServerIP = poolServerIP;
this->_poolServerName = NULL;
this->_updateInterval = updateInterval;
}
void NTPClient::begin() {
this->begin(NTP_DEFAULT_LOCAL_PORT);
}
void NTPClient::begin(unsigned int port) {
this->_port = port;
this->_udp.begin(this->_port);
this->_udpSetup = true;
}
bool NTPClient::forceUpdate() {
#ifdef DEBUG_NTPClient
Serial.println("Update from NTP Server");
#endif
// flush any existing packets
while(this->_udp.parsePacket() != 0)
this->_udp.flush();
this->sendNTPPacket();
// Wait till data is there or timeout...
byte timeout = 0;
int cb = 0;
do {
delay ( 10 );
cb = this->_udp.parsePacket();
if (timeout > 100) return false; // timeout after 1000 ms
timeout++;
} while (cb == 0);
this->_lastUpdate = millis() - (10 * (timeout + 1)); // Account for delay in reading the time
this->_udp.read(this->_packetBuffer, NTP_PACKET_SIZE);
unsigned long highWord = word(this->_packetBuffer[40], this->_packetBuffer[41]);
unsigned long lowWord = word(this->_packetBuffer[42], this->_packetBuffer[43]);
// combine the four bytes (two words) into a long integer
// this is NTP time (seconds since Jan 1 1900):
unsigned long secsSince1900 = highWord << 16 | lowWord;
this->_currentEpoc = secsSince1900 - SEVENZYYEARS;
return true; // return true after successful update
}
bool NTPClient::update() {
if ((millis() - this->_lastUpdate >= this->_updateInterval) // Update after _updateInterval
|| this->_lastUpdate == 0) { // Update if there was no update yet.
if (!this->_udpSetup || this->_port != NTP_DEFAULT_LOCAL_PORT) this->begin(this->_port); // setup the UDP client if needed
return this->forceUpdate();
}
return false; // return false if update does not occur
}
unsigned long NTPClient::getEpochTime() const {
return this->_timeOffset + // User offset
this->_currentEpoc + // Epoc returned by the NTP server
((millis() - this->_lastUpdate) / 1000); // Time since last update
}
int NTPClient::getDay() const {
return (((this->getEpochTime() / 86400L) + 4 ) % 7); //0 is Sunday
}
int NTPClient::getHours() const {
return ((this->getEpochTime() % 86400L) / 3600);
}
int NTPClient::getMinutes() const {
return ((this->getEpochTime() % 3600) / 60);
}
int NTPClient::getSeconds() const {
return (this->getEpochTime() % 60);
}
String NTPClient::getFormattedTime() const {
unsigned long rawTime = this->getEpochTime();
unsigned long hours = (rawTime % 86400L) / 3600;
String hoursStr = hours < 10 ? "0" + String(hours) : String(hours);
unsigned long minutes = (rawTime % 3600) / 60;
String minuteStr = minutes < 10 ? "0" + String(minutes) : String(minutes);
unsigned long seconds = rawTime % 60;
String secondStr = seconds < 10 ? "0" + String(seconds) : String(seconds);
return hoursStr + ":" + minuteStr + ":" + secondStr;
}
void NTPClient::end() {
this->_udp.stop();
this->_udpSetup = false;
}
void NTPClient::setTimeOffset(int timeOffset) {
this->_timeOffset = timeOffset;
}
void NTPClient::setUpdateInterval(unsigned long updateInterval) {
this->_updateInterval = updateInterval;
}
void NTPClient::setPoolServerName(const char* poolServerName) {
this->_poolServerName = poolServerName;
}
void NTPClient::sendNTPPacket() {
// set all bytes in the buffer to 0
memset(this->_packetBuffer, 0, NTP_PACKET_SIZE);
// Initialize values needed to form NTP request
// (see URL above for details on the packets)
this->_packetBuffer[0] = 0b11100011; // LI, Version, Mode
this->_packetBuffer[1] = 0; // Stratum, or type of clock
this->_packetBuffer[2] = 6; // Polling Interval
this->_packetBuffer[3] = 0xEC; // Peer Clock Precision
// 8 bytes of zero for Root Delay & Root Dispersion
this->_packetBuffer[12] = 49;
this->_packetBuffer[13] = 0x4E;
this->_packetBuffer[14] = 49;
this->_packetBuffer[15] = 52;
// all NTP fields have been given values, now
// you can send a packet requesting a timestamp:
if (this->_poolServerName) {
this->_udp.beginPacket(this->_poolServerName, 123);
} else {
this->_udp.beginPacket(this->_poolServerIP, 123);
}
this->_udp.write(this->_packetBuffer, NTP_PACKET_SIZE);
this->_udp.endPacket();
}
void NTPClient::setRandomPort(unsigned int minValue, unsigned int maxValue) {
randomSeed(analogRead(0));
this->_port = random(minValue, maxValue);
}