-
Notifications
You must be signed in to change notification settings - Fork 5
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
1 changed file
with
139 additions
and
140 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,141 +1,140 @@ | ||
/* | ||
"Get time (epoch) and local time through an NTP server" | ||
modified from https://github.com/sandeepmistry/esp8266-Arduino/blob/master/esp8266com/esp8266/libraries/ESP8266WiFi/examples/NTPClient/NTPClient.ino | ||
This program is free software: you can redistribute it and/or modify | ||
it under the terms of the GNU General Public License as published by | ||
the Free Software Foundation, either version 3 of the License, or | ||
(at your option) any later version. | ||
This program is distributed in the hope that it will be useful, | ||
but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
GNU General Public License for more details. | ||
You should have received a copy of the GNU General Public License | ||
along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
---------------- | ||
You can edit NKNTP.h in order to change to your Timezone and DST | ||
check https://github.com/JChristensen/Timezone/blob/master/ReadMe.md for examples. | ||
-------------------------------------------------------------------------------- | ||
*/ | ||
|
||
#include <ESP8266WiFi.h> | ||
#include <WiFiUdp.h> | ||
// the Timezone library is modified by nikant to remove eeprom access, check Timezone.h and Timezone.cpp for commented out sections | ||
#include <Timezone.h> //https://github.com/JChristensen/Timezone | ||
|
||
|
||
unsigned int localPort = 2390; // local port to listen for UDP packets | ||
|
||
/* Don't hardwire the IP address or we won't get the benefits of the pool. | ||
* Lookup the IP address for the host name instead */ | ||
//IPAddress timeServer(129, 6, 15, 28); // time.nist.gov NTP server | ||
IPAddress timeServerIP; // time.nist.gov NTP server address | ||
const char* ntpServerName = "time.nist.gov"; | ||
|
||
const int NTP_PACKET_SIZE = 48; // NTP time stamp is in the first 48 bytes of the message | ||
|
||
byte packetBuffer[ NTP_PACKET_SIZE]; //buffer to hold incoming and outgoing packets | ||
|
||
// A UDP instance to let us send and receive packets over UDP | ||
WiFiUDP udp; | ||
|
||
boolean NTPsuccess = false; | ||
|
||
void getTheNTPTime() { | ||
Serial.println(F("Starting UDP")); | ||
udp.begin(localPort); | ||
Serial.print(F("Local port: ")); | ||
Serial.println(udp.localPort()); | ||
|
||
//get a random server from the pool | ||
WiFi.hostByName(ntpServerName, timeServerIP); | ||
|
||
sendNTPpacket(timeServerIP); // send an NTP packet to a time server | ||
// wait to see if a reply is available | ||
delay(1000); | ||
|
||
int cb = udp.parsePacket(); | ||
if (!cb) { | ||
Serial.println(F("no packet yet")); | ||
} | ||
else { | ||
Serial.print(F("packet received, length=")); | ||
Serial.println(cb); | ||
// We've received a packet, read the data from it | ||
udp.read(packetBuffer, NTP_PACKET_SIZE); // read the packet into the buffer | ||
|
||
//the timestamp starts at byte 40 of the received packet and is four bytes, | ||
// or two words, long. First, esxtract the two words: | ||
|
||
unsigned long highWord = word(packetBuffer[40], packetBuffer[41]); | ||
unsigned long lowWord = word(packetBuffer[42], 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; | ||
//Serial.print("Seconds since Jan 1 1900 = " ); | ||
//Serial.println(secsSince1900); | ||
|
||
// now convert NTP time into everyday time: | ||
Serial.print(F("Unix time = ")); | ||
// Unix time starts on Jan 1 1970. In seconds, that's 2208988800: | ||
const unsigned long seventyYears = 2208988800UL; | ||
// subtract seventy years: | ||
unsigned long epoch = secsSince1900 - seventyYears; | ||
|
||
// print Unix time: | ||
Serial.println(epoch); | ||
|
||
// set time to local timezone | ||
setTime(myTZ.toLocal(epoch)); | ||
|
||
NTPsuccess = true; | ||
|
||
} | ||
} | ||
|
||
// send an NTP request to the time server at the given address | ||
unsigned long sendNTPpacket(IPAddress& address) | ||
{ | ||
Serial.println(F("sending NTP packet...")); | ||
// set all bytes in the buffer to 0 | ||
memset(packetBuffer, 0, NTP_PACKET_SIZE); | ||
// Initialize values needed to form NTP request | ||
// (see URL above for details on the packets) | ||
packetBuffer[0] = 0b11100011; // LI, Version, Mode | ||
packetBuffer[1] = 0; // Stratum, or type of clock | ||
packetBuffer[2] = 6; // Polling Interval | ||
packetBuffer[3] = 0xEC; // Peer Clock Precision | ||
// 8 bytes of zero for Root Delay & Root Dispersion | ||
packetBuffer[12] = 49; | ||
packetBuffer[13] = 0x4E; | ||
packetBuffer[14] = 49; | ||
packetBuffer[15] = 52; | ||
|
||
// all NTP fields have been given values, now | ||
// you can send a packet requesting a timestamp: | ||
udp.beginPacket(address, 123); //NTP requests are to port 123 | ||
udp.write(packetBuffer, NTP_PACKET_SIZE); | ||
udp.endPacket(); | ||
} | ||
|
||
|
||
void NTP2localTime() { | ||
int gettimestamp = 0; | ||
getTheNTPTime(); | ||
while (year() == 1970) { | ||
delay(1000); | ||
getTheNTPTime(); | ||
gettimestamp += 1; | ||
if (gettimestamp == 5) { | ||
NTPsuccess = false; | ||
break; | ||
} | ||
} | ||
gettimestamp = 0; | ||
/* | ||
"Get time (epoch) and local time through an NTP server" | ||
modified from https://github.com/sandeepmistry/esp8266-Arduino/blob/master/esp8266com/esp8266/libraries/ESP8266WiFi/examples/NTPClient/NTPClient.ino | ||
This program is free software: you can redistribute it and/or modify | ||
it under the terms of the GNU General Public License as published by | ||
the Free Software Foundation, either version 3 of the License, or | ||
(at your option) any later version. | ||
This program is distributed in the hope that it will be useful, | ||
but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
GNU General Public License for more details. | ||
You should have received a copy of the GNU General Public License | ||
along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
---------------- | ||
You can edit NKNTP.h in order to change to your Timezone and DST | ||
check https://github.com/JChristensen/Timezone/blob/master/ReadMe.md for examples. | ||
-------------------------------------------------------------------------------- | ||
*/ | ||
|
||
#include <ESP8266WiFi.h> | ||
#include <WiFiUdp.h> | ||
// the Timezone library is modified by nikant to remove eeprom access, check Timezone.h and Timezone.cpp for commented out sections | ||
#include <Timezone.h> //https://github.com/JChristensen/Timezone | ||
|
||
|
||
unsigned int localPort = 2390; // local port to listen for UDP packets | ||
|
||
/* Don't hardwire the IP address or we won't get the benefits of the pool. | ||
* Lookup the IP address for the host name instead */ | ||
//IPAddress timeServer(129, 6, 15, 28); // time.nist.gov NTP server | ||
IPAddress timeServerIP; // time.nist.gov NTP server address | ||
const char* ntpServerName = "time.nist.gov"; | ||
|
||
const int NTP_PACKET_SIZE = 48; // NTP time stamp is in the first 48 bytes of the message | ||
|
||
byte packetBuffer[ NTP_PACKET_SIZE]; //buffer to hold incoming and outgoing packets | ||
|
||
// A UDP instance to let us send and receive packets over UDP | ||
WiFiUDP udp; | ||
|
||
boolean NTPsuccess = false; | ||
|
||
void getTheNTPTime() { | ||
Serial.println(F("Starting UDP")); | ||
udp.begin(localPort); | ||
Serial.print(F("Local port: ")); | ||
Serial.println(udp.localPort()); | ||
|
||
//get a random server from the pool | ||
WiFi.hostByName(ntpServerName, timeServerIP); | ||
|
||
sendNTPpacket(timeServerIP); // send an NTP packet to a time server | ||
// wait to see if a reply is available | ||
delay(1000); | ||
|
||
int cb = udp.parsePacket(); | ||
if (!cb) { | ||
Serial.println(F("no packet yet")); | ||
} | ||
else { | ||
Serial.print(F("packet received, length=")); | ||
Serial.println(cb); | ||
// We've received a packet, read the data from it | ||
udp.read(packetBuffer, NTP_PACKET_SIZE); // read the packet into the buffer | ||
|
||
//the timestamp starts at byte 40 of the received packet and is four bytes, | ||
// or two words, long. First, esxtract the two words: | ||
|
||
unsigned long highWord = word(packetBuffer[40], packetBuffer[41]); | ||
unsigned long lowWord = word(packetBuffer[42], 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; | ||
//Serial.print("Seconds since Jan 1 1900 = " ); | ||
//Serial.println(secsSince1900); | ||
|
||
// now convert NTP time into everyday time: | ||
Serial.print(F("Unix time = ")); | ||
// Unix time starts on Jan 1 1970. In seconds, that's 2208988800: | ||
const unsigned long seventyYears = 2208988800UL; | ||
// subtract seventy years: | ||
unsigned long epoch = secsSince1900 - seventyYears; | ||
|
||
// print Unix time: | ||
Serial.println(epoch); | ||
|
||
// set time to local timezone | ||
setTime(myTZ.toLocal(epoch)); | ||
|
||
NTPsuccess = true; | ||
} | ||
} | ||
|
||
// send an NTP request to the time server at the given address | ||
unsigned long sendNTPpacket(IPAddress& address) | ||
{ | ||
Serial.println(F("sending NTP packet...")); | ||
// set all bytes in the buffer to 0 | ||
memset(packetBuffer, 0, NTP_PACKET_SIZE); | ||
// Initialize values needed to form NTP request | ||
// (see URL above for details on the packets) | ||
packetBuffer[0] = 0b11100011; // LI, Version, Mode | ||
packetBuffer[1] = 0; // Stratum, or type of clock | ||
packetBuffer[2] = 6; // Polling Interval | ||
packetBuffer[3] = 0xEC; // Peer Clock Precision | ||
// 8 bytes of zero for Root Delay & Root Dispersion | ||
packetBuffer[12] = 49; | ||
packetBuffer[13] = 0x4E; | ||
packetBuffer[14] = 49; | ||
packetBuffer[15] = 52; | ||
|
||
// all NTP fields have been given values, now | ||
// you can send a packet requesting a timestamp: | ||
udp.beginPacket(address, 123); //NTP requests are to port 123 | ||
udp.write(packetBuffer, NTP_PACKET_SIZE); | ||
udp.endPacket(); | ||
} | ||
|
||
|
||
void NTP2localTime() { | ||
int gettimestamp = 0; | ||
getTheNTPTime(); | ||
while (year() == 1970) { | ||
delay(1000); | ||
getTheNTPTime(); | ||
gettimestamp += 1; | ||
if (gettimestamp == 19) { | ||
NTPsuccess = false; | ||
break; | ||
} | ||
} | ||
gettimestamp = 0; | ||
} |