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2025-07-08 08:54:35 +08:00
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commit 6de3458dfc
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lib/WebServer_ESP32_W5500/examples/UdpNTPClient/UdpNTPClient.ino Normal file
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/****************************************************************************************************************************
UdpNTPClient.ino - Simple Arduino web server sample for ESP8266 AT-command shield
For Ethernet shields using ESP32_W5500 (ESP32 + W5500)
WebServer_ESP32_W5500 is a library for the ESP32 with Ethernet W5500 to run WebServer
Based on and modified from ESP32-IDF https://github.com/espressif/esp-idf
Built by Khoi Hoang https://github.com/khoih-prog/WebServer_ESP32_W5500
Licensed under GPLv3 license
*****************************************************************************************************************************/
/*
The Arduino board communicates with the shield using the SPI bus. This is on digital pins 11, 12, and 13 on the Uno
and pins 50, 51, and 52 on the Mega. On both boards, pin 10 is used as SS. On the Mega, the hardware SS pin, 53,
is not used to select the Ethernet controller chip, but it must be kept as an output or the SPI interface won't work.
*/
#if !( defined(ESP32) )
#error This code is designed for (ESP32 + W5500) to run on ESP32 platform! Please check your Tools->Board setting.
#endif
#define DEBUG_ETHERNET_WEBSERVER_PORT Serial
// Debug Level from 0 to 4
#define _ETHERNET_WEBSERVER_LOGLEVEL_ 3
//////////////////////////////////////////////////////////
// Optional values to override default settings
// Don't change unless you know what you're doing
//#define ETH_SPI_HOST SPI3_HOST
//#define SPI_CLOCK_MHZ 25
// Must connect INT to GPIOxx or not working
//#define INT_GPIO 4
//#define MISO_GPIO 19
//#define MOSI_GPIO 23
//#define SCK_GPIO 18
//#define CS_GPIO 5
//////////////////////////////////////////////////////////
#include <WebServer_ESP32_W5500.h>
// Enter a MAC address and IP address for your controller below.
#define NUMBER_OF_MAC 20
byte mac[][NUMBER_OF_MAC] =
{
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x01 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x02 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x03 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x04 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x05 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x06 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x07 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x08 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x09 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x0A },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x0B },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x0C },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x0D },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x0E },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x0F },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x10 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x11 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x12 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0x13 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xBE, 0x14 },
};
// Select the IP address according to your local network
IPAddress myIP(192, 168, 2, 232);
IPAddress myGW(192, 168, 2, 1);
IPAddress mySN(255, 255, 255, 0);
// Google DNS Server IP
IPAddress myDNS(8, 8, 8, 8);
char timeServer[] = "time.nist.gov"; // NTP server
unsigned int localPort = 2390; // local port to listen for UDP packets
const int NTP_PACKET_SIZE = 48; // NTP timestamp is in the first 48 bytes of the message
const int UDP_TIMEOUT = 2000; // timeout in milliseconds to wait for an UDP packet to arrive
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;
// send an NTP request to the time server at the given address
void sendNTPpacket(char *ntpSrv)
{
// 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(ntpSrv, 123); //NTP requests are to port 123
Udp.write(packetBuffer, NTP_PACKET_SIZE);
Udp.endPacket();
}
void setup()
{
Serial.begin(115200);
while (!Serial && (millis() < 5000));
Serial.print(F("\nStart UdpNTPClient on "));
Serial.print(ARDUINO_BOARD);
Serial.print(F(" with "));
Serial.println(SHIELD_TYPE);
Serial.println(WEBSERVER_ESP32_W5500_VERSION);
ET_LOGWARN(F("Default SPI pinout:"));
ET_LOGWARN1(F("SPI_HOST:"), ETH_SPI_HOST);
ET_LOGWARN1(F("MOSI:"), MOSI_GPIO);
ET_LOGWARN1(F("MISO:"), MISO_GPIO);
ET_LOGWARN1(F("SCK:"), SCK_GPIO);
ET_LOGWARN1(F("CS:"), CS_GPIO);
ET_LOGWARN1(F("INT:"), INT_GPIO);
ET_LOGWARN1(F("SPI Clock (MHz):"), SPI_CLOCK_MHZ);
ET_LOGWARN(F("========================="));
///////////////////////////////////
// To be called before ETH.begin()
ESP32_W5500_onEvent();
// start the ethernet connection and the server:
// Use DHCP dynamic IP and random mac
//bool begin(int MISO_GPIO, int MOSI_GPIO, int SCLK_GPIO, int CS_GPIO, int INT_GPIO, int SPI_CLOCK_MHZ,
// int SPI_HOST, uint8_t *W6100_Mac = W6100_Default_Mac);
ETH.begin( MISO_GPIO, MOSI_GPIO, SCK_GPIO, CS_GPIO, INT_GPIO, SPI_CLOCK_MHZ, ETH_SPI_HOST );
//ETH.begin( MISO_GPIO, MOSI_GPIO, SCK_GPIO, CS_GPIO, INT_GPIO, SPI_CLOCK_MHZ, ETH_SPI_HOST, mac[millis() % NUMBER_OF_MAC] );
// Static IP, leave without this line to get IP via DHCP
//bool config(IPAddress local_ip, IPAddress gateway, IPAddress subnet, IPAddress dns1 = 0, IPAddress dns2 = 0);
//ETH.config(myIP, myGW, mySN, myDNS);
ESP32_W5500_waitForConnect();
///////////////////////////////////
Udp.begin(localPort);
}
void loop()
{
sendNTPpacket(timeServer); // send an NTP packet to a time server
// wait for a reply for UDP_TIMEOUT milliseconds
unsigned long startMs = millis();
while (!Udp.available() && (millis() - startMs) < UDP_TIMEOUT) {}
// if there's data available, read a packet
int packetSize = Udp.parsePacket();
if (packetSize)
{
Serial.print(F("UDP Packet received, size "));
Serial.println(packetSize);
Serial.print(F("From "));
IPAddress remoteIp = Udp.remoteIP();
Serial.print(remoteIp);
Serial.print(F(", port "));
Serial.println(Udp.remotePort());
// We've received a packet, read the data from it into the buffer
Udp.read(packetBuffer, NTP_PACKET_SIZE);
// 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(F("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);
// print the hour, minute and second:
Serial.print(F("The UTC time is ")); // UTC is the time at Greenwich Meridian (GMT)
Serial.print((epoch % 86400L) / 3600); // print the hour (86400 equals secs per day)
Serial.print(F(":"));
if (((epoch % 3600) / 60) < 10)
{
// In the first 10 minutes of each hour, we'll want a leading '0'
Serial.print(F("0"));
}
Serial.print((epoch % 3600) / 60); // print the minute (3600 equals secs per minute)
Serial.print(F(":"));
if ((epoch % 60) < 10)
{
// In the first 10 seconds of each minute, we'll want a leading '0'
Serial.print(F("0"));
}
Serial.println(epoch % 60); // print the second
}
// wait ten seconds before asking for the time again
delay(10000);
}