ESP32 Forum

After synchronizing time from NTP, can the time still run after the internet connection is lost? how to keep time update stored in memory without having to connect to the server after rebooting or power off? I'm using esp-idf framework.

the code is from https://github.com/espressif/esp-idf/bl ... ple_main.c

The ESP32 will keep time while running, even when not connected to a network, as well as during sleep modes including deep sleep (although not very precisely in deep sleep, unless it has a 32KHz crystal connected to it). It does not keep the time when powered off or through an (external) reset.