With ESP32 core 3.1.0 NTP.begin() restarts the MCU

[ednieuw]

FYI
On a Arduino Nano ESP32 NTP.begin(); restarts the Nano when compiling with Espressif ESP32 core 3.1.0
With core 3.0.7 there is no issue

[ednieuw]

Has probably something to do with the WIFI connection in 3.1.

[ednieuw]

Tried this example sketch with core 3.1.1 but it crashes the MCU
No idea were to look. A
As mentioned above with core ESP32 3.0.7 there were no problems

`
#include <Arduino.h>
#include <ESPNtpClient.h>
#include <WiFi.h>

#define SHOW_TIME_PERIOD 1000

void setup() {
Serial.begin (115200);
Serial.println ();
WiFi.begin ("FRITZ!Box", "mysecretpwd");
NTP.setTimeZone (TZ_Etc_UTC);
NTP.begin ();
}

void loop() {
static int last = 0;

if ((millis () - last) >= SHOW_TIME_PERIOD) {
    last = millis ();
    Serial.println (NTP.getTimeDateStringUs ());
}

}

`

[ednieuw]

https://github.com/espressif/arduino-esp32/issues/10902#issuecomment-2613996805

The issue comment was:
The network part in core 3.1.x has been refactored. The NTP lib needs to be changed to work with these changes.

[Nourbakhsh-Rad]

I have the same problem!