I think this is related to the Attenuation setting, the old code accepted 11db, the new wants 12db.
regards

Hi all, tried a slight modification of the above code for an overnight test and it gained about 3 minutes..

/*
* dw from https://esp32.com/viewtopic.php?f=19&t=5188&p=60278&hilit=sntp#p60278
*/
#include <WiFi.h>
#include <esp_sleep.h>

#define NTP_SRV "au.pool.ntp.org"
#define NTP_CYCLE 300 ...