After power on, memory contents is random. The exact pattern for "randomness" will differ from one chip to another. You may be able to detect whether your variables are "valid" by calculating a hash sum (or a CRC) and saving that in NOINIT section along with the variables. If after reset you find th...

Hi RA5040, I might have a clue where the issue is, could you please try one thing to check? In openocd directory, in share/openocd/scripts/target/esp32.cfg, change "halt" to "reset halt" on line 78: $TGT configure -event gdb-attach { reset halt } Save the file, start openocd, "make flash", try to co...

Flash read error likely happens because flash chip start up time is too slow, and ROM code tries to read from it before it is ready. It should not cause problems though, just an extra RTC WDT reset. Can you enable debug log level for both bootloader and app, and post the log produced when doing OTA,...

The order of starting gdb and OpenOCD should not matter, as long as OpenOCD is running at the point when you are executing "target remote ..." command in GDB.

Hi RA5040,

Not full dbg stub table 1 of 2 is not an error, it is logged at info level.

The reason was that the return type represents a moment in time, relative to some point (startup). So time can be both positive and negative, even if this function only ever returns positive values. This is similar to time_t being signed on most systems even though time() always returns positive val...

Please see the comment here: https://esp32.com/viewtopic.php?f=13&t= ... =10#p29505.

(adding to the ESP_Sprite's comment above) 2) Where is this stored? I reviewed the documentation and saw the partitioning, as well as the ROM/RAM/RTC Fast/Slow distribution. NVS library stores data in flash memory. Typically ESP32 based modules contain 4MB or more of flash memory( link ), which is u...

Possibly RTC memory via RTC_NOINIT_ATTR, but it may be lost if the supply voltage drops below about 1V.

Please have a look at protocols/sntp example in ESP-IDF:

https://github.com/espressif/esp-idf/tr ... cols/sntp/