NTP client

[leruetkins]

Please tell me can this library connect to ntp server and get unix time?

[niki-timofe]

Yes. NTP is realized by UDP, so you can look example in arduino IDE, how to issue ntp-server by UDP.

[leruetkins]

I saw an example in the standard library wifi, but I do not understand how to use this library? How to use with this library Udp.parsePacket (); Udp.read (); Udp.begin Packet (); Udp.write (); Udp.endPacket ()? Can someone tell me the code?

[leruetkins]

Find solution to get unix time with this library:

include "ESP8266.h"

include

SoftwareSerial espSerial(10, 11);

define HOST_NAME "82.209.243.241"

define HOST_PORT (123)

ESP8266 wifi(espSerial);

void setup() { Serial.begin(9600); Serial.print("setup begin\r\n"); Serial.print("Join AP success\r\n"); Serial.print("IP: "); Serial.println(wifi.getLocalIP().c_str());

if (wifi.disableMUX()) { Serial.print("single ok\r\n"); } else { Serial.print("single err\r\n"); }

Serial.print("setup end\r\n"); } void loop() { ntpupdate(); delay(20000); }

void ntpupdate() { uint8_t buffer[128] = {0};

if (wifi.registerUDP(HOST_NAME, HOST_PORT)) { Serial.print("register udp ok\r\n"); } else { Serial.print("register udp err\r\n"); }

static const char PROGMEM timeReqA[] = { 227, 0, 6, 236 }, timeReqB[] = { 49, 78, 49, 52 }; // Assemble and issue request packet uint8_t buf[48]; memset(buf, 0, sizeof(buf)); memcpy_P( buf , timeReqA, sizeof(timeReqA)); memcpy_P(&buf[12], timeReqB, sizeof(timeReqB));

// char _buf = "Hello, this is client!"; wifi.send((const uint8t)buf, 48);

uint32_t len = wifi.recv(buffer, sizeof(buffer), 10000); if (len > 0) { Serial.print("UNIX TIME IS:");

// Serial.print(buffer[42]);
unsigned long t = (((unsigned long)buffer[40] << 24) |
                   ((unsigned long)buffer[41] << 16) |
                   ((unsigned long)buffer[42] <<  8) |
                   (unsigned long)buffer[43]) - 2208988800UL;

Serial.println(t);

}

if (wifi.unregisterUDP()) { Serial.print("unregister udp "); Serial.println(" ok"); } else { Serial.print("unregister udp "); Serial.println(" err"); } }