Hallo, ich will mir die NTP Zeit mit einem ESP32 von meiner Fritzbox holen. Wenn ich das Demoprogramm von der IDE genau so lasse funktioniert das auch aber sobald ich die Zeile:
WiFi.config(local_IP, gateway, subnet,primaryDNS,secondaryDNS);
aktiviere funktioniert es nicht mehr.
Wenn ich die Zeit von einem fremden Server hole dann funktioniert es.
Ich kann auch mit den selben Daten auf den Hello Server zugreifen.
Woran kann das liegen?
#include <WiFi.h>
#include "time.h"
#include "sntp.h"
//const char* ssid = "YOUR_SSID";
//const char* password = "YOUR_PASS";
IPAddress local_IP(192, 168, 0, 156);
IPAddress gateway(192, 168, 0, 100);
IPAddress subnet(255, 255, 255, 0);
IPAddress primaryDNS(8, 8, 8, 8);
IPAddress secondaryDNS(8, 8, 4, 4);
//const char* ntpServer1 = "pool.ntp.org";
//const char* ntpServer2 = "time.nist.gov";
const char* ntpServer1 = "fritz.box";
const char* ntpServer2 = "fritz.box";
const long gmtOffset_sec = 3600;
const int daylightOffset_sec = 3600;
const char* time_zone = "CET-1CEST,M3.5.0,M10.5.0/3"; // TimeZone rule for Europe/Rome including daylight adjustment rules (optional)
void printLocalTime() {
struct tm timeinfo;
if (!getLocalTime(&timeinfo)) {
Serial.println("No time available (yet)");
return;
}
Serial.println(&timeinfo, "%A, %B %d %Y %H:%M:%S");
}
// Callback function (get's called when time adjusts via NTP)
void timeavailable(struct timeval* t) {
Serial.println("Got time adjustment from NTP!");
printLocalTime();
}
void setup() {
//Wenn diese Zeile deaktiviert ist funktioniert es, ansonsten nur über die externe Adresse
WiFi.config(local_IP, gateway, subnet, primaryDNS, secondaryDNS);
Serial.begin(115200);
// set notification call-back function
sntp_set_time_sync_notification_cb(timeavailable);
/**
* NTP server address could be aquired via DHCP,
*
* NOTE: This call should be made BEFORE esp32 aquires IP address via DHCP,
* otherwise SNTP option 42 would be rejected by default.
* NOTE: configTime() function call if made AFTER DHCP-client run
* will OVERRIDE aquired NTP server address
*/
sntp_servermode_dhcp(1); // (optional)
/**
* This will set configured ntp servers and constant TimeZone/daylightOffset
* should be OK if your time zone does not need to adjust daylightOffset twice a year,
* in such a case time adjustment won't be handled automagicaly.
*/
configTime(gmtOffset_sec, daylightOffset_sec, ntpServer1, ntpServer2);
/**
* A more convenient approach to handle TimeZones with daylightOffset
* would be to specify a environmnet variable with TimeZone definition including daylight adjustmnet rules.
* A list of rules for your zone could be obtained from https://github.com/esp8266/Arduino/blob/master/cores/esp8266/TZ.h
*/
//configTzTime(time_zone, ntpServer1, ntpServer2);
//connect to WiFi
Serial.printf("Connecting to %s ", ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println(" CONNECTED");
}
void loop() {
delay(5000);
printLocalTime(); // it will take some time to sync time :)
}